Lintel Manual 11 - NMBS

Lintel Manual 11
Cl/SfB (31.9) Hh2

The UK and Ireland’s leading supplier of Steel Lintels and
the authority on providing lintel solutions to builders,
developers, builders merchants and end-users.
Keystone Lintels Limited, the leading manufacturer of steel lintels was founded in 1989.
The short history of Keystone has been one of relentless expansion and continuous
innovation whilst redefining the meaning of service in the lintel industry.
Production facilities in Swadlincote and Cookstown provide an efficient, flexible and ergonomic working environment,
which is part of the culture of quality and service at Keystone.
Keystone Group HQ, Cookstown
Keystone Lintels, Swadlincote
Keystone… the lintel company with genuine commitment to servicing your lintel requirements.
Keystone’s most important asset is its people. Every employee undergoes training on our NVQ approved premises.
We have also received the Investors in People accreditation.
Keystone People
Professional
Trained and Motivated
Accessible
Responsive
Extensive Product Knowledge
2

The Keystone support package includes:
Contents
page
Individual design service on full range of lintels
On site technical assistance and measurement
Free scheduling and specification service
Extensive range of steel lintels and structural supports
Structural performance calculations
Best delivery service in the industry
Comprehensive product literature
Interactive website with AutoCAD drawings
RIBA Assessed CPD Online “Steel Lintels – The Definitive Guide”.
Visit www.keystonelintels.co.uk/cpd
BMF & NMBS Approved Merchant e-Learning - Staff Training Online
Visit www.keystonelintels.co.uk/merchant
Company Profile 2
Lintel Selection Chart 4
Technical Data 6
Cavity Wall Lintel 8
(50-165mm Cavity)
Extra Heavy Duty Lintels 17
Eaves Lintels 18
Archboards 18
Solid Wall Lintels 19
Single Leaf Lintels 20
Box Lintels 22
Thin Joint Lintels 24
Cavity Trays 26
Extended Range 28
RIBA Assessed CPD 29
Special & Custom-made Lintels 30
Full Arch 32
Segmental Arch 32
Venetian Arch 33
Apex Arch 33
Parabolic Arch 34
Gothic Arch 35
Corner 36
Bow 37
Square Bay 38
Splayed Bay 39
Sun Lounge Lintel 40
Bow Sun Lounge Lintel 44
Venetian Arch Sun Lounge Lintel 45
Apex Sun Lounge Lintel 46
Brick Arch Sets 47
Windposts 48
Keystone “Special” Projects 50
Keylite Roof Windows 58
3

Lintel Selection Chart
50-70mm Cavity Wall Lintels
S/K-50
S/K-50 WIL
S/K-50 WOL
Standard Loading
Page 8
HD/K-50
Page 8
HD/K-50 WIL
Page 8
CFS/K-50
Heavy Duty Loading
Page 9
Page 9
Page 9
70-90mm Cavity Wall Lintels
S/K-70
S/K-70 WIL
S/K-70 WOL
Standard Loading
Page 10
HD/K-70
Page 10
HD/K-70 WIL
Page 10
CFS/K-70
Heavy Duty Loading
Page 11
Page 11
Page 11
90-110mm Cavity Wall Lintels
S/K-90
S/K-90 WIL
S/K-90 WOL
Standard Loading
Page 12
HD/K-90
Page 12
HD/K-90 WIL
Page 12
CFS/K-90
Heavy Duty Loading
Page 13
Page 13
Page 13
110-165mm Cavity Wall Lintels
S/K-110
S/K-110 WIL
HD/K-110
110-130mm Cavity
Page 14
S/K-130
Page 14
S/K-130 WIL
Page 14
HD/K-130
130-150mm Cavity
Page 15
Page 15
Page 15
S/K-150
S/K-150 WIL
HD/K-150
150-165mm Cavity
Page 16
Page 16
Page 16
Extra Heavy Duty Lintels
X/K
X/K-WIL
X/K-215 WIL
Page 17 Page 17 Page 17
Solid Wall Lintels
INT/K
SW/K
IB/K (2c)
Page 19 Page 19 Page 19
Box Lintels
BOX/K-60 BOX/K-75
BOX/K-100
BOX/K-150
Standard Loading
Heavy Duty Loading
Page 22 Page 22 Page 23
HDBOX/K-100
HDBOX/K-150
HDBOX/K-200
Page 22 Page 23 Page 23
Single Leaf Lintels
SB/K
SL/K
SW/K-100
Page 20 Page 20 Page 20
T/K HDT/K
B/K
RB/K
Page 21 Page 20 Page 21
Eaves Lintels and Arch Boards
EL/K-50
EL/K-90
Arch Boards
Page 18 Page 18 Page 18
4

CPD Online: www.keystonelintels.co.uk/cpd
Special & Custom-made Lintels
S/K-50 215 WIL
Full Arch Lintel
Segmental Arch Lintel
Venetian Arch Lintel
Page 8
CFS/K-50 WIL
Page 9
S/K-70 215 WIL
Page 10
CFS/K-70 WIL
Page 11
Page 32
Page 32
Page 33
Apex Arch Lintel Parabolic Arch Lintel Gothic Arch Lintel
S/K-90 215 WIL
Page 12
CFS/K-90 WIL
Page 13
CFS/K-110
Page 14
CFS/K-130
Page 15
CFS/K-150
Page 33
Corner Lintel
Page 34 Page 35
Bow Lintel
Square Bay Lintel
Page 16
Page 36
Page 37
Page 38
IBX/K
Splayed Bay Lintel
Sun Lounge Lintel
Bow Sun Lounge Lintel
Page 17
IB/K (3c)
Page 19
BOX/K-200
Page 23
TJ/K & TW/K
Thin Joint Lintels
Page 24 and 25
Cavity Trays
Page 26
Roller Shutter Lintel
Page 28
Brick Arch Sets
Page 47
Windposts
Page 48
Page 39
Venetian Arch Sun
Lounge Lintel
Page 45
Page 40
Apex Sun Lounge
Lintel
Page 46
Page 44
Keystone “Special”
Projects
Page 50
the key to a brighter life
Page 58
5

Technical Data
Material
Keystone Lintels are manufactured from high quality grade galvanised steel to BS EN
10346:2009 DX51D plus Z600 or Z275 with minimised spangle finish. In accordance with
BS5977: part 2, 1983 (BS EN 845-2:2003) all cut edges are treated with corrosion resistant
paint.
Insulation
The Keystone Lintel core is entirely filled with ‘CFC free’ insulation, which completely fills
all voids in the lintel, particularly at the apex ensuring continuity with wall insulation and
reducing cold bridge effect in this area. This ensures that the Keystone Lintel range is one
of the most thermally efficient lintels available with a thermal conductivity of 0.033 W/mk.
Quality
ISO 9001
CERTIFICATE NO. FM 21541
ISO 14001
CERTIFICATE NO. EMS 553955
Structural
Performance
Keystone Lintels are manufactured to the highest quality and are continually assessed by the
BSI to ensure our quality assurance systems comply with BS EN ISO 9001: 2008. The ‘Keystone
People’ are also a highly trained and motivated workforce. Our manufacturing premises have
been approved as a N.V.Q. Training Centre and the company has also received the Investors In
People Accreditation.
Keystone is committed to the continuous development of our Environmental Management
Systems, working in partnership with our specifiers, customers and suppliers. Keystone Lintels
Ltd are the first steel lintel manufacturer to be awarded BS EN ISO 14001:2004.
The Keystone Lintel range have safe working loads shown in each applicable loading table,
taking into account the differential loading arrangements which are common to traditional
cavity wall construction.
Differential Load 3:1 ratio, 75% load on inner leaf.
Differential Load 19:1 ratio, 95% load on inner leaf.
Lintel Types HD/K, S/K-50 (215WIL), S/K-70 (215WIL), SK-90 (215WIL), S/K-110, S/K-130, S/K-150,
SB/K, T/K, SL/K, RB/K, TJ/K, TW/K, INT/K, SW/K, IB/K, EL/K-50, EL/K-90, CFS/K, X/K have been tested
as a composite unit with surrounding masonry, built in accordance with BS5628-3:2005. These
composite units have been tested in accordance with the requirements of BS5977: part 2 1983
(BS EN 845-2:2003).
Testing
BBA – Extensive testing has been carried out on the Keystone range of lintels. The lintel testing
procedure and Agrément Board assessment is carried out under the direct supervision of
the University of Ulster.
Fire Test – The Keystone S/K lintel range has been subjected to fire tests at the Warrington Fire
Research Station and has achieved a one hour fire certificate by successfully supporting their
imposed load for 48 hours after the tests.
Durability – The service life of lintels shall be the same as that anticipated for the building
within which they are used, when used in conjunction with a flexible D.P.C. and where the
normal humidity and condensation levels of a habitable building exist. The Keystone Lintel
range complies with the technical requirements of the Housing Association Property Mutual
6

CPD Online: www.keystonelintels.co.uk/cpd
Technical Data
Installation
Lintels should be installed with a minimum end bearing of 150mm bedded in mortar,
levelled along its length and across its width. With cavity walls, both leaves should be raised
together to avoid excessive eccentricity of loading and be allowed to cure before applying
floor or roof loads. Blockwork is permitted to overhang the lintel flange by a maximum of
25mm. Point loads and concrete floor units should not be applied without prior consultation
with our Technical Department or a Structural Engineer.
Care should also be exercised in the selection of lintels for each application with regard
to wall construction, cavity width and loads applied.
COSHH – All components and materials in our products are considered as non-hazardous to
health under normal conditions of use as determined by COSHH Regulations 1994.
Due care should be taken when lifting and handling lintels with regard to weights. A table
of weights for individual lintel types is available on request. For further information contact
our Technical Department.
A cavity tray should be installed over all openings in external cavity walls.
Support for
the Specifier
For queries regarding
Keystone AutoCAD files
please contact Fastrack on
Tel: +44 (0)20 8668 4646
We provide the following:
Individual Design Service on full range of Specials
On-Site technical assistance and measurement
Specification service for Architects and Engineers
Take off / Scheduling Service for drawings
Structural Performance Calculations
Comprehensive product range literature
and interactive website
“Steel Lintels – The Definitive Guide”.
Visit www.keystonelintels.co.uk/cpd
To view or download any of our architectural details and sun
lounge plans visit our website at www.keystonelintels.co.uk
Keystone Lintel
Profile
Negligible Cold
Bridging Effect
Profiled Insulation
‘CFC free’
Steel Plaster Key for improved fire resistance
Thermal Break Plate
(Part ‘L’ Compliant) for added rigidity and structural performance
7

50-70mm Cavity
Standard Loading
S/K-50
Manufactured Length 600 1350 1650 1950 2250 2550 2850 3150 3750 4200*
in 150mm increments 1200 1500 1800 2100 2400 2700 3000 3600 4000 4800*
Height ‘h’ 79 98 110 134 150 172 172 209 209 209
‘h’ nominal
Thickness 1.6 1.8 2 2 2 2 2.5 2.9 2.9 3.2
Total UDL kn 3:1 12 14 19 21 21 26 27 27 26 27
95 48 100
Total UDL kn 19:1 10 12 16 17 19 22 20 20 19 22
S/K-50 WIL
150mm wide inner leaf
Manufactured Length 600 1650 1950 2250 2550 3150* 3750*
in 150mm increments 1500 1800 2100 2400 3000 3600* 4200*
Height ‘h’ 96 110 136 162 172 196 196
‘h’ nominal
Thickness 2 2 2 2 2.5 3.2 3.2
Total UDL kn 3:1 12 15 20 24 28 30 27
95 48 125
Total UDL kn 19:1 10 13 18 20 21 26 25
S/K-50 215 WIL
Extended fin 225mm high for
lintels greater than 2100mm long
215mm wide inner leaf
Manufactured Length 600* 1350* 1650* 1950* 2250* 2550* 2850* 3150*
in 150mm increments 1200* 1500* 1800* 2100* 2400* 2700* 3000* 4000*
Height ‘h’ 78 104 121 146 171 171 209 209
Thickness 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.9
Total UDL kn 3:1 25 25 25 30 30 35 40 40
‘h’ nominal
Total UDL kn 19:1 20 20 20 25 25 30 35 35
100 120 140 175 225 225 225 225
95 48 210
Fin height equals lintel height up to 2100mm long
S/K-50 WOL
For standard loading conditions with 215mm wide inner leaf as a composite beam.
To achieve loading figures, lintel must be built in with blockwork as shown.
150mm wide outer leaf
Manufactured Length 600 1500 1800 2250 2850* 3150*
in 150mm increments 1350 1650 2100 2700 3000* 3600*
Height ‘h’ 110 122 172 200 200 200
‘h’ nominal
Thickness 2.5 2.5 2.5 2.9 2.9 3.2
Total UDL kn 3:1 14 15 23 30 32 30
120 48 100
Total UDL kn 19:1 11 13 18 22 30 26
8

CPD Online: www.keystonelintels.co.uk/cpd
50-70mm Cavity
Heavy Duty Loading
HD/K-50
Manufactured Length 600 1350 1650* 2250* 2700* 3150* 3750*
in 150mm increments 1200 1500 2100* 2550* 3000* 3600* 4200*
‘h’ nominal
Height ‘h’ 105 121 171 209 209 209 209
Thickness 2.9 2.9 2.9 2.9 3.2 3.2 3.2
Total UDL kn 3:1 30 30 40 40 40 35 33
95 48 100
Total UDL kn 19:1 22 22 35 35 35 32 28
HD/K-50 WIL
150mm wide inner leaf
Manufactured Length 600 1350* 1650* 1950* 2250*
in 150mm increments 1200 1500* 1800* 2100* 2700*
Height ‘h’ 95 109 161 161 200
‘h’ nominal
Thickness 2.9 2.9 2.9 2.9 3.2
Total UDL kn 3:1 20 25 35 30 36
95 48 125
Total UDL kn 19:1 17 22 27 25 32
CFS/K-50
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 48 100
To achieve loading figures, lintel must be built in with blockwork as shown.
CFS/K-50 WIL
150mm wide inner leaf
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 48 125
To achieve loading figures, lintel must be built in with blockwork as shown.
*Continuous Bottom Plate
9

70-90mm Cavity
Standard Loading
S/K-70
Manufactured Length 600 1350 1650 1950 2250 2550 3150 3750 4200*
in 150mm increments 1200 1500 1800 2100 2400 3000 3600 4000 4800*
Height ‘h’ 98 89 106 130 142 168 204 204 204
‘h’ nominal
Thickness 1.6 1.8 2 2 2 2.5 2.9 2.9 3.2
Total UDL kn 3:1 12 14 18 21 21 27 27 26 27
95 68 100
Total UDL kn 19:1 10 12 14 17 19 22 20 19 22
S/K-70 WIL
150mm wide inner leaf
Manufactured Length 600 1500 1950 2250 2550 3150* 3750*
in 150mm increments 1350 1650 1800 2100 2400 3000 3600* 4200*
Height ‘h’ 93 90 110 134 158 167 192 192
‘h’ nominal
Thickness 2 2 2 2 2 2.5 3.2 3.2
Total UDL kn 3:1 12 13 20 19 24 27 30 27
95 68 125
Total UDL kn 19:1 10 11 17 17 20 21 26 25
S/K-70 215 WIL
Extended fin 225mm high for
lintels greater than 2100mm long
215mm wide inner leaf
Manufactured Length 600* 1350* 1650* 1950* 2250* 2550* 2850* 3150*
in 150mm increments 1200* 1500* 1800* 2100* 2400* 2700* 3000* 4000*
Height ‘h’ 67 100 110 142 167 167 167 204
Thickness 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.9
Total UDL kn 3:1 25 25 25 30 30 35 40 40
‘h’ nominal
Total UDL kn 19:1 20 20 20 25 25 30 35 35
100 120 140 175 225 225 225 225
95 68 210
Fin height equals lintel height up to 2100mm long
S/K-70 WOL
For standard loading conditions with 215mm wide inner leaf as a composite beam.
To achieve loading figures, lintel must be built in with blockwork as shown.
150mm wide outer leaf
Manufactured Length 600 1500 1800 2250 2850* 3150*
in 150mm increments 1350 1650 2100 2700 3000* 3600*
Height ‘h’ 106 118 168 192 192 192
‘h’ nominal
Thickness 2.5 2.5 2.5 2.9 2.9 3.2
Total UDL kn 3:1 14 15 23 30 32 30
120 68 100
Total UDL kn 19:1 11 13 18 22 30 26
10

CPD Online: www.keystonelintels.co.uk/cpd
70-90mm Cavity
Heavy Duty Loading
HD/K-70
Manufactured Length 600 1350 1650* 2250* 2700* 3150* 3750*
in 150mm increments 1200 1500 2100* 2550* 3000* 3600* 4200*
‘h’ nominal
Height ‘h’ 103 117 167 205 205 205 205
Thickness 2.9 2.9 2.9 2.9 3.2 3.2 3.2
Total UDL kn 3:1 30 30 40 40 40 35 33
95 68 100
Total UDL kn 19:1 22 22 35 35 35 32 28
HD/K-70 WIL
150mm wide inner leaf
Manufactured Length 600 1500* 1950* 2250*
in 150mm increments 1350 1800* 2100* 2700*
Height ‘h’ 130 155 192 192
‘h’ nominal
Thickness 2.9 2.9 2.9 3.2
Total UDL kn 3:1 20 25 30 36
95 68 125
Total UDL kn 19:1 17 22 25 32
CFS/K-70
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 68 100 To achieve loading figures, lintel must be built in with blockwork as shown.
CFS/K-70 WIL
150mm wide inner leaf
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 68 125
To achieve loading figures, lintel must be built in with blockwork as shown.
*Continuous Bottom Plate
11

90-110mm Cavity
Standard Loading
S/K-90
Manufactured Length 600 1350 1650 1950 2250 2550 2850 3150 3750 4200*
in 150mm increments 1200 1500 1800 2100 2400 2700 3000 3600 4000 4800*
Height ‘h’ 88 88 107 125 150 162 171 200 200 200
‘h’ nominal
Thickness 1.6 1.8 2 2 2 2.5 2.5 2.9 2.9 3.2
Total UDL kn 3:1 12 16 19 21 23 27 27 27 26 27
95 88 100
Total UDL kn 19:1 10 13 16 17 18 22 20 20 19 22
S/K-90 WIL
150mm wide inner leaf
Manufactured Length 600 1350 1950 2550 3150* 3750*
in 150mm increments 1200 1800 2400 3000 3600* 4200*
Height ‘h’ 92 107 150 177 188 188
‘h’ nominal
Thickness 2 2 2 2.5 3.2 3.2
Total UDL kn 3:1 13 17 23 24 30 27
95 88 125
Total UDL kn 19:1 11 14 18 18 26 25
S/K-90 215 WIL
Extended fin 225mm high for
lintels greater than 2100mm long
215mm wide inner leaf
Manufactured Length 600* 1500* 1800* 2250* 2850* 3150*
in 150mm increments 1350* 1650* 2100* 2700* 3000* 4000*
Height ‘h’ 90 105 138 163 171 200
Thickness 2.5 2.5 2.5 2.5 2.5 3.2
Total UDL kn 3:1 25 25 30 35 40 40
‘h’ nominal
Total UDL kn 19:1 20 20 25 30 35 35
100 120 175 225 225 225
95 88 210
Fin height equals lintel height up to 2100mm long
S/K-90 WOL
For standard loading conditions with 215mm wide inner leaf as a composite beam.
To achieve loading figures, lintel must be built in with blockwork as shown.
150mm wide outer leaf
Manufactured Length 600 1500 1800 2250 2850* 3150*
in 150mm increments 1350 1650 2100 2700 3000* 3600*
Height ‘h’ 93 110 162 188 188 188
‘h’ nominal
Thickness 2.5 2.5 2.5 2.9 3.2 3.2
Total UDL kn 3:1 14 15 23 30 32 30
120 88 100
Total UDL kn 19:1 11 13 18 22 30 26
12

CPD Online: www.keystonelintels.co.uk/cpd
90-110mm Cavity
Heavy Duty Loading
HD/K-90
Manufactured Length 600 1350* 1650* 2250* 2700* 3150* 3750*
in 150mm increments 1200 1500* 2100* 2550* 3000* 3600* 4200*
Height ‘h’ 110 135 163 203 203 203 203
‘h’ nominal
Thickness 2.9 2.9 2.9 2.9 3.2 3.2 3.2
Total UDL kn 3:1 30 30 40 40 40 35 33
95 88 100
Total UDL kn 19:1 22 22 35 35 35 32 28
HD/K-90 WIL
150mm wide inner leaf
Manufactured Length 600 1350* 1650* 1950* 2250*
in 150mm increments 1200 1500* 1800* 2100* 2700*
Height ‘h’ 113 135 165 165 188
‘h’ nominal
Thickness 2.9 2.9 2.9 2.9 3.2
Total UDL kn 3:1 20 25 35 30 36
95 88 125
Total UDL kn 19:1 17 22 27 25 32
CFS/K-90
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 88 100 To achieve loading figures, lintel must be built in with blockwork as shown.
CFS/K-90 WIL
150mm wide inner leaf
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 88 125
To achieve loading figures, lintel must be built in with blockwork as shown.
*Continuous Bottom Plate
13

110-130mm Cavity
Wide Cavity Lintels
S/K-110
Manufactured Length 600* 1650* 1950* 2250* 3150* 4200*
in 150mm increments 1500* 1800* 2100* 3000* 4000* 4800*
Height ‘h’ 95 121 145 195 195 195
‘h’ nominal
Thickness 2 2 2.5 2.9 3.2 3.2
Total UDL kn 3:1 16 22 24 27 26 25
95 108 100
Total UDL kn 19:1 13 18 18 22 19 20
S/K-110 WIL
150mm wide inner leaf
Manufactured Length 600* 1350* 1950* 2550* 3150*
in 150mm increments 1200* 1800* 2400* 3000* 4000*
Height ‘h’ 95 107 142 185 185
‘h’ nominal
Thickness 2 2 2.5 2.9 3.2
Total UDL kn 3:1 13 17 23 24 24
95 108 125
Total UDL kn 19:1 11 14 18 18 17
SK-110 WIL range are also available to suit 215mm wide inner leaf e.g. specify S/K-110 215WIL.
Contact Keystone Technical Team for load tables.
HD/K-110
Manufactured Length 600* 1650* 2250* 3150* 3750*
in 150mm increments 1500* 2100* 3000* 3600* 4000*
‘h’ nominal
Height ‘h’ 125 145 195 195 195
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 3:1 30 30 35 32 30
95 108 100
Total UDL kn 19:1 20 22 30 28 26
HD/K-110 range is also available to suit 150mm wide inner leaf e.g. specify HD/K-110 WIL.
CFS/K-110
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 108 100
CFS/K-110 range is also available to suit 150mm wide inner leaf e.g. specify CFS/K-110 WIL.
To achieve loading figures, lintel must be built in with blockwork as shown.
14

CPD Online: www.keystonelintels.co.uk/cpd
130-150mm Cavity
Wide Cavity Lintels
S/K-130
Manufactured Length 600* 1650* 1950* 2250* 3150* 4200*
in 150mm increments 1500* 1800* 2100* 3000* 4000* 4800*
Height ‘h’ 103 128 190 190 190 190
‘h’ nominal
Thickness 2 2 2.5 2.9 3.2 3.2
Total UDL kn 3:1 16 22 24 27 26 25
95 128 100
Total UDL kn 19:1 13 18 18 22 19 20
S/K-130 WIL
150mm wide inner leaf
Manufactured Length 600* 1350* 1950* 2550* 3150*
in 150mm increments 1200* 1800* 2400* 3000* 4000*
Height ‘h’ 90 118 178 178 178
‘h’ nominal
Thickness 2 2 2.5 2.9 3.2
Total UDL kn 3:1 13 17 23 24 24
95 128 125
Total UDL kn 19:1 11 14 18 18 17
SK-130 WIL range are also available to suit 215mm wide inner leaf e.g. specify S/K-130 215WIL.
Contact Keystone Technical Team for load tables.
HD/K-130
Manufactured Length 600* 1650* 2250* 3150* 3750*
in 150mm increments 1500* 2100* 3000* 3600* 4000*
Height ‘h’ 115 155 190 190 212
‘h’ nominal
Thickness 2.9 2.9 3.2 3.2 3.2
Total UDL kn 3:1 30 30 35 30 30
95 128 100
Total UDL kn 19:1 20 22 30 25 26
HD/K-130 range is also available to suit 150mm wide inner leaf e.g. specify HD/K-130 WIL.
CFS/K-130
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 128 100
CFS/K-130 range is also available to suit 150mm wide inner leaf e.g. specify CFS/K-130 WIL.
To achieve loading figures, lintel must be built in with blockwork as shown.
*Continuous Bottom Plate
15

150-165mm Cavity
Wide Cavity Lintels
S/K-150
Manufactured Length 600* 1650* 1950* 2250* 3150* 4200*
in 150mm increments 1500* 1800* 2100* 3000* 4000* 4800*
Height ‘h’ 100 125 180 180 180 180
‘h’ nominal
Thickness 2 2 2.5 2.9 3.2 3.2
Total UDL kn 3:1 16 22 24 27 26 25
95 148 100
Total UDL kn 19:1 13 18 18 22 19 20
S/K-150 WIL
150mm wide inner leaf
Manufactured Length 600* 1350* 1950* 2550* 3150*
in 150mm increments 1200* 1800* 2400* 3000* 4000*
Height ‘h’ 88 115 168 168 168
‘h’ nominal
Thickness 2 2 2.5 2.9 3.2
Total UDL kn 3:1 13 17 23 24 24
95 148 125
Total UDL kn 19:1 11 14 18 18 17
SK-150 WIL range are also available to suit 215mm wide inner leaf e.g. specify S/K-150 215WIL.
Contact Keystone Technical Team for load tables.
HD/K-150
Manufactured Length 600* 1650* 2250* 3150* 3750*
in 150mm increments 1500* 2100* 3000* 3600* 4000*
Height ‘h’ 125 160 180 180 200
‘h’ nominal
Thickness 2.9 2.9 3.2 3.2 3.2
Total UDL kn 3:1 30 30 35 30 30
95 148 100
Total UDL kn 19:1 20 22 30 25 26
HD/K-150 range is also available to suit 150mm wide inner leaf e.g. specify HD/K-150 WIL.
CFS/K-150
Manufactured Length 600 1650 2250 3150 4200
in 150mm increments 1500 2100 3000 4000 4800
229
Height ‘h’ 229 229 229 229 229
Thickness 2.9 2.9 2.9 3.2 3.2
Total UDL kn 19:1 70 60 50 45 40
95 148 100
CFS/K-150 range is also available to suit 150mm wide inner leaf e.g. specify CFS/K-150 WIL.
To achieve loading figures, lintel must be built in with blockwork as shown.
16

CPD Online: www.keystonelintels.co.uk/cpd
50-110mm Cavity
X/K-50/70/90
Galvanised steel
flange to outer leaf
203 x 133 x 30kg/m UB
inner leaf
Manufactured Length to 600
customers requirements 4800 5200 5400 5800 6200 6600
Extra Heavy Duty Lintels
End bearing 200 200 200 200 200 200
Total UDL kn 86 75 70 65 60 55
To achieve loading figures, lintel must be laterally restrained. Lintel must be suitably propped during construction.
X/K lintel range is available to suit 110-165mm cavity widths, e.g. specify X/K-110, X/K-130 and X/K-150.
Nominal
X/K-50/70/90 WIL
Galvanised steel
flange to outer leaf
203 x 133 x 30kg/m UB
inner leaf
150mm wide inner leaf
Manufactured Length to 600
customers requirements 4800 5200 5400 5800 6200 6600
End bearing 200 200 200 200 200 200
Total UDL kn 86 75 70 65 60 55
To achieve loading figures, lintel must be laterally restrained. Lintel must be suitably propped during construction.
X/K WIL lintel range is available to suit 110-165mm cavity widths, e.g. specify X/K-110, X/K-130 and X/K-150.
X/K-50/70/90 215 WIL
Galvanised steel
flange to outer leaf
Nominal
203 x 133 x 30kg/m UB
inner leaf
215mm wide inner leaf
Manufactured Length to 600
customers requirements 4800 5200 5400 5800 6200 6600
End bearing 200 200 200 200 200 200
Total UDL kn 86 75 70 65 60 55
To achieve loading figures, lintel must be laterally restrained. Lintel must be suitably propped during construction.
X/K 215 lintel range is available to suit 110-165mm cavity widths, e.g. specify X/K-110, X/K-130 and X/K-150.
IBX/K
Galvanised steel
flange to outer leaf
Nominal
230 x 90 x 32.76kg/m PFC
inner leaf
215mm wide solid wall
Manufactured Length to 600
customers requirements 4800 5200 5400 5800 6200 6600
End bearing 200 200 200 200 200 200
Total UDL kn 86 75 70 65 60 55
To achieve loading figures, lintel must be laterally restrained. Lintel must be built in with block/brickwork as shown
and suitably propped during construction.
195
*Continuous Bottom Plate
17

Eaves Lintels and Arch Boards
EL/K-50
To suit cavity 50-80mm
Manufactured Length 600 1650 2250 2550
in 150mm increments 1500 2100 2400 2700
Height ‘h’ 95 134 150 150
Thickness 2 2 2 2.5
Total UDL kn 18 20 22 25
40 48 100
The EL/K-50 range can be supplied to suit 150mm inner leaf e.g.specify EL/K-50 WIL.
For standard loading conditions at eaves level as a composite beam. To achieve loading figures lintel must be built in
with blockwork and wall plate as shown.
EL/K-90
To suit cavity 85-120mm
Manufactured Length 600 1650 2250 2550
in 150mm increments 1500 2100 2400 2700
Height ‘h’ 95 134 150 150
Thickness 2 2 2 2.5
Total UDL kn 18 20 22 25
40 88 100
The EL/K-90 range can be supplied to suit 150mm inner leaf e.g.specify EL/K-90 WIL.
For standard loading conditions at eaves level as a composite beam. To achieve loading figures lintel must be built in
with blockwork and wall plate as shown.
Arch Board
The Keystone Arch Board is available from
stock in white plastic. This product is also
available in a soft wood e.g. specify AB0925SW.
18
Nominal Arch Span Rise (mm) Plastic Code
450-500 475 75 AB 0475P
600-650 625 75 AB 0625P
655-705 680 75 AB 0680P
725-775 750 75 AB 0750P
800-850 825 75 AB 0825P
900-950 925 75 AB 0925P
1025-1075 1050 75 AB 1050P
1075-1175 1135 75 AB 1135P
1200-1250 1225 75 AB 1225P
1325-1375 1350 75 AB 1350P
1460-1510 1485 75 AB 1485P
1500-1550 1525 75 AB 1525P
1600-1650 1625 75 AB 1625P
1675-1725 1700 75 AB 1700P
1760-1810 1785 75 AB 1785P
1900-1950 1925 150 AB 1925P
1950-2000 1975 150 AB 1975P
2100-2150 2125 150 AB 2125P
2225-2275 2250 150 AB 2250P
2300-2350 2325 150 AB 2325P
2400-2450 2425 150 AB 2425P
2550-2600 2575 150 AB 2575P

CPD Online: www.keystonelintels.co.uk/cpd
Solid Wall Lintels
INT/K-100
100
Max Span 700 850 900 1000
28
Total UDL kn with
150mm coursing
Total UDL kn with
225mm coursing
5 5 5 5
10 10 10 10
For standard loading conditions to support internal openings in 100mm thick walls. The INT/K range can be supplied
to suit 75mm wide walls e.g. specify INT/K 60.
SW/K
Manufactured Length 600 1350 1800 2250
in 150mm increments 1200 1650 2100 2700
Height ‘h’ 55 86 86 113
‘h’ nominal
Thickness 2.5 2.5 2.9 3.2
195
Total UDL kn 6 8 8 10
For light duty loading conditions for 215mm solid wall construction.
To achieve loading figures, lintel must be built in with block/brickwork as shown and suitably propped during construction.
IB/K (2c)
Manufactured Length 600 1950 2250
in 150mm increments 1800 2100 3000
152
Height ‘h’ 152 152 152
Thickness 2.5 2.9 3.2
195
Total UDL kn 30 30 30
For heavy duty loading conditions for 215mm solid wall construction.
To achieve loading figures, lintel must be built in with block/brickwork as shown and suitably propped during construction.
IB/K (3c)
Manufactured Length 600 1950 2250 3150 4200
in 150mm increments 1800 2100 3000 4000 4800
Height ‘h’ 227 227 227 227 227
227
Thickness 2.5 2.5 2.9 3.2 3.2
Total UDL kn 45 40 40 40 35
195
For heavy duty loading conditions for 215mm solid wall construction.
To achieve loading figures, lintel must be built in with block/brickwork as shown and suitably propped during construction.
19

Single Leaf Lintels
SB/K
Manufactured Length 600 1500 1950 2400
in 150mm increments 1350 1800 2250 2700
Height ‘h’ 80 100 150 200
Thickness 3.2 3.2 3.2 3.2
‘h’ nominal
SL/K
95
Optional factory fitted Cavity Closer
(spec. SB/Kcc)
Total UDL kn 2.5 5 7 8
For use to support the outer leaf of cavity wall construction.
The SB/K lintel should be suitably propped during construction. The SB/K lintel can be supplied with no top bend
(e.g.specify ANG/K).
Manufactured Length 600 1500 1950 2550 2850
in 150mm increments 1350 1800 2400 2700 3000
‘h’ nominal
95
Height ‘h’ 150 150 225 225 225
Thickness 2.5 2.5 2.5 2.9 3.2
Total UDL kn 16 20 20 12 12
For use to support single leaf or outer leaf of cavity wall construction.
To achieve loading figures, lintel must be built in with brickwork as shown and be suitably propped during construction.
SW/K-100
Manufactured Length 600 1350 1800 2250
in 150mm increments 1200 1650 2100 2700
Height ‘h’ 55 86 86 113
Thickness 2.5 2.5 2.9 3.2
‘h’ nominal
Total UDL kn 6 8 8 10
95
Suitable for 100mm and 150mm wide solid walls. To achieve loading figures, lintel must be built in with
block/brickwork as shown and suitably propped during construction.
B/K-50/70/90
Manufactured Length 600 2250 2550 3150
in 150mm increments 2100 2400 3000 4800
Height ‘h’ 150 225 225 225
Thickness 2.5 2.5 2.9 3.2
‘h’ nominal
Total UDL kn 7 8 10 12
95 Nominal
For use with inner leaf concrete lintel. The B/K lintel must be used in conjunction with a tight fitting timber batten, as
shown, to prevent twisting. The B/K range can be supplied to suit wider cavities: e.g. specify B/K-70, B/K-90.
20

CPD Online: www.keystonelintels.co.uk/cpd
Single Leaf Lintels
T/K-50/70/90
Lateral restraint clips at 500mm centres
fixed with 4mm x 50mm galvanised nails
Manufactured Length 600 1800 2550 3150
in 150mm increments 1650 2400 3000 4800
Height ‘h’ 102 155 185 250
Thickness 2.5 2.5 2.9 3.2
Total UDL kn 5 8 9 12
‘h’ nominal
For use with timber frame construction. The T/K lintel must be used in conjunction with lateral restraint clips and a
tight fitting timber batten, as shown, to prevent twisting. The T/K range can be supplied to suit wider cavities:
e.g. specify T/K-70, T/K-90.
95
Nominal
HDT/K-50/70/90
Lateral restraint clips at 500mm centres
fixed with 4mm x 50mm galvanised nails
Manufactured Length 600 1800 2550
in 150mm increments 1650 2400 3000
Height ‘h’ 155 185 250
Thickness 2.5 2.9 3.2
‘h’ nominal
Total UDL kn 10 12 12
For use with timber frame construction. The T/K lintel must be used in conjunction with lateral restraint clips and a
tight fitting timber batten, as shown, to prevent twisting. The T/K range can be supplied to suit wider cavities:
e.g. specify T/K-70, T/K-90.
95
Nominal
XHDT/K-50/70/90
Lateral restraint clips at 500mm centres
fixed with 4mm x 50mm galvanised nails
Manufactured Length 600 3150
in 150mm increments 3000 4800
Height ‘h’ 250 250
Thickness 2.9 3.2
‘h’ nominal
Total UDL kn 18 18
For use with timber frame construction. The T/K lintel must be used in conjunction with lateral restraint clips and a
tight fitting timber batten, as shown, to prevent twisting. The T/K range can be supplied to suit wider cavities:
e.g. specify T/K-70, T/K-90.
95
Nominal
RB/K-50/70/90
Manufactured Length 600 1650 2550 3150
in 150mm increments 1500 2400 3000 4800
Height ‘h’ 175 200 250 250
Thickness 2.5 2.9 2.9 3.2
Total UDL kn/m 7.5 7.5 7.5 7.5
For use with integral concrete ring beams. The RB/K type lintel must be bolted to the concrete ring beam at 400mm
c/c using M16 rawl bolts. The RB/K type range can be supplied to facilitate various cavity widths: e.g. specify RB/K-50,
RB/K-70, RB/K-90.
95 Nominal
21

Box Lintels
BOX/K-60
95
75
Manufactured Length 600 1650
in 150mm increments 1500 1800
Height ‘h’ 95 95
Perforated steel for plaster key
Thickness 1.6 1.6
Total UDL kn 15 10
Used to support internal openings in 75mm wide walls. (Can be insulated as optional extra).
BOX/K-75
75
95
Perforated steel for plaster key
Manufactured Length 600
in 150mm increments 1650 1800
Height ‘h’ 75 75
Thickness 1.6 2
Total UDL kn 15 10
Used to support internal openings in 100mm wide walls. (Can be insulated as optional extra).
BOX/K-100
95
95
Manufactured Length 600 1650 1950 2550 2850 3750 4200
in 150mm increments 1500 1800 2400 2700 3600 4000 4800
95
150
215
Height ‘h’ 75 150 150 150 215 215 215
75
Thickness 2 1.6 2 2 2.5 2.5 2.5
Total UDL kn 18 18 25 20 35 30 24
Perforated steel for plaster key
Used to support internal or external openings with 100mm wide walls. (Can be insulated as optional extra).
HDBOX/K-100
Manufactured Length 600 1350 1950
in 150mm increments 1200 1800 2700
‘h’ nominal
Height ‘h’ 150 150 215
Thickness 2.5 2.5 2.5
Perforated steel for plaster key
95
Total UDL kn 50 45 40
For heavy duty loading conditions to support internal or external openings with 100mm wide wall. (Can be insulated
as optional extra).
22

CPD Online: www.keystonelintels.co.uk/cpd
Box Lintels
BOX/K-150
‘h’ nominal
145
Manufactured Length 600 1950 2550 2850 3750 4200
in 150mm increments 1800 2400 2700 3600 4000 4800
Height ‘h’ 150 150 150 215 215 215
Thickness 1.6 2 2 2.5 2.5 2.5
Perforated steel for plaster key
Total UDL kn 18 25 20 35 30 24
Used to support internal or external openings with 150mm wide walls. (Can be insulated as optional extra).
HDBOX/K-150
Manufactured Length 600 1350 1950
in 150mm increments 1200 1800 2700
‘h’ nominal
Height ‘h’ 150 150 215
Thickness 2.5 2.5 2.5
Perforated steel for plaster key
145
Total UDL kn 50 45 40
For heavy duty loading conditions to support internal or external openings with 150mm wide wall. (Can be insulated
as optional extra).
BOX/K-200
Manufactured Length 600 1950 2550 2850 3750 4200
in 150mm increments 1800 2400 2700 3600 4000 4800
Height ‘h’ 150 150 150 215 215 215
Thickness 1.6 2 2 2.5 2.5 2.5
‘h’ nominal
Total UDL kn 18 25 20 35 30 24
Used to support internal or external openings with 215mm wide wall. (Can be insulated as optional extra).
200
Perforated steel for plaster key
HDBOX/K-200
Manufactured Length 600 1350 1950
in 150mm increments 1200 1800 2700
Height ‘h’ 150 150 215
Thickness 2.5 2.5 2.5
‘h’ nominal
Total UDL kn 50 45 40
For heavy duty loading conditions to support internal or external openings with 215mm wide wall. (Can be insulated
as optional extra).
200
Perforated steel for plaster key
23

Thin Joint Cavity Lintel System
Standard Loading
A New Development in
Cavity Wall Construction
The TJ/K lintel range enables fastrack
construction of the structural internal
leaf before the external leaf is built*
Fully Insulated Cavity
Thermal Break Plate
Part ‘L’ Compliant
Award-winning Earthdome specifies Keystone TJ/K Lintel
The Secretary of State for Trade and Industry, presented the Earthdome project with top
environmental award.
Earthdome is a pioneering project where super thermally efficient, ecologically sound and
hypo-allergenic homes are being constructed using the most thermally efficient materials
available - Keystone’s Thin-Joint lintels fitted the bill!
The Earthdome Eco project won the prestigious Green Apple Environment Award. It was
selected to be ‘British Green Champion’ - top of it’s class for Fuel Power & Energy’. Winning
this award is likely to give this innovative project access to European Environmental Awards.
TJ/K-50
Lateral restraint clips at 500mm centres
fixed with 4mm x 50mm galvanised nails
Level uniform
surface for
3mm joint
Manufactured Length 600 1650 1950 2250 2850
in 150mm increments 1500 1800 2100 2700 3000
Specification A B C D E
Height ‘h’ 130 160 225 225 225
‘h’ nominal
Extended C
section 225mm
high for lintels
greater than
1800mm
Thickness 5 5 3.2 5 5
Total UDL (Kn)
Internal Leaf
Total UDL (Kn)
External Leaf
10 15 18 27 25
3 5 8 9 10
95 48 100
Thermal Break Plate
Part ‘L’ compliant
For standard loading conditions in 50mm wide thin joint cavity wall construction. To achieve loading figures lintels
must be built in as shown with firmly butted perpendicular joints. The TJ/K lintel range can be supplied to suit wider
cavities e.g. specify TJ/K-70, TJ/K-90.
24
Note: For other loading conditions contact the Keystone Technical Dept.
*Subject to structural conditions

CPD Online: www.keystonelintels.co.uk/cpd
Thin Joint Solid Wall Lintels
The TW/K lintel range has been
developed by Keystone for use
over openings in thin joint solid
wall construction.
External Cladding
Thermal Break
(Part ‘L’ Compliant)
TW/K-215
Cold Outer Surface
Manufactured Length 600 1350 1800 2250
in 150mm increments 1200 1650 2100 2700
Warm Inner Surface
Height ‘h’ 55 86 86 113
‘h’ nominal
195
Thermal Break
Thickness 2.5 2.5 2.9 3.2
Total UDL kn 6 8 8 10
For light duty loading conditions for 215mm solid wall construction.
To achieve loading figures, lintel must be built in with block/brickwork as shown and suitably propped during construction.
The TW/K lintel range is available to suit 250 to 300mm wide walls e.g. specify TW/K-250, TW/K-300.
HDTW/K-215
Manufactured Length 600 1950 2250
in 150mm increments 1800 2100 3000
Height ‘h’ 152 152 152
Thickness 2.5 2.9 3.2
Total UDL kn 20 22 27
150
195
Thermal Break
ITW/K-215
For heavy duty loading conditions for 215mm solid wall construction.
To achieve loading figures, lintel must be built in with block/brickwork as shown and suitably propped during construction.
The HDTW/K lintel range is available to suit 250 to 300mm wide walls e.g. specify HDTW/K-250, HDTW/K-300.
Manufactured Length 600 1950 2250 3150 4200
in 150mm increments 1800 2100 3000 4000 4800
Height ‘h’ 227 227 227 227 227
Thickness 2.5 2.5 2.9 3.2 3.2
Total UDL kn 45 40 40 40 35
227
For heavy duty loading conditions for 215mm solid wall construction.
To achieve loading figures, lintel must be built in with block/brickwork as shown and suitably propped during construction.
The ITW/K lintel range is available to suit 250 to 300mm wide walls e.g. specify ITW/K-250, ITW/K-300.
195
Thermal Break
25

Cavity Trays
A Unique Single Element
Cavity Tray System
Unique Products with
Available off-the-shelf in easy-to-handle
flat packs
Easy to calculate quantities, transport, use
and adapt
Three sizes cover all roof pitches and cavity
widths
Impact, tear and abuse resistant
thermostable polypropylene 0.8mm thick
Compatible with all building materials
Resistant to acid, alkali and sulphate
Meets all current Building Regulations and
NHBC requirements
Will last the lifetime of the building
The most cost-effective cavity tray system
available
Available from a national network of stockists
Gable Abutment
Refurbishment
26

CPD Online: www.keystonelintels.co.uk/cpd
Cavity Trays
Gable Abutment System
When a stepped or staggered gable abutment
is formed the status of the external skin below
the roof line changes to that of an internal
skin. Accordingly, every gable abutment must
be constructed so as to prevent dampness and
rainwater from penetrating below the abutting
roof line.
The Keystone gable abutment cavity tray forms
a stepped cavity dpc which is incorporated into
the building during bricklaying. The completed
structure is ready to receive roof lead flashing
in the conventional way.
The Keystone Cavity Tray - Type GA
Manufactured from polypropylene, the
Keystone gable abutment cavity tray is
available in three sizes to suit all roof pitches
up to 60°. It is suitable for use in all brick, block
and timber-framed constructions, the large
bridging piece catering for cavity widths from
50mm to 100mm.
Supplied flat, the pre-creased trays allow for
easy on-site folding to the required shape -
catchment, left and right hand or ridge tray. A
locating lip facilitates the accurate placement
of trays during bricklaying.
Calculating Quantities
The single-element system makes the
calculation of quantities very simple. Whether
you are building with bricks or blocks the rule
is the same: you require one cavity tray per
course per slope. On a double slope roof this
calculation will give you an extra tray that can
be used to lengthen the ridge tray if required.
The Keystone gable abutment cavity tray is
available in three sizes. Trays are supplied in
shrink-wrapped flat packs in the quantities
indicated or as single items.
Construction Pitch in mm of:
Brickwork 22.5º-60º GA1 375x310 50or10
Blockwork more than 45º
Brickwork 15º-30º GA2 525x310 5
Blockwork 35º-45º
Brickwork less than 15º GA3 675x310 5
Blockwork 25º-40º
Note: All packs contain full installation instructions and
folding instructions are printed on each tray
Internal / External Corners
Flat-packed foldable corners complete the
Keystone gable abutment cavity tray system.
Both internal (GAIC) and external (GAEC)
corner trays comprise factory-jointed twopiece
assemblies that are folded on site to form
right-angled corners. The trays are pre-creased
and incorporate adjustment for 50mm, 75mm
or 100mm cavity widths and incorporate
mastic sealant strips for overlapping areas.
Refurbishment System
The Keystone refurbishment cavity trays
system has been specifically developed to
facilitate both the insertion of a new tray into
an existing wall and the repair or alteration of
an existing damp proof course.
Where to Use
Where a new lean-to extension meets an
existing building, the original external wall
becomes an internal partition below the roof
line and must be protected from dampness and
the penetration of rainwater. Similarly, when a
flat roof is resurfaced with added insulation,
or is reconstructed as an inverted roof with
top paving, the roof level may be raised and
thus require the skirting and its corresponding
damp proof course to be lifted.
In addition, existing cavity trays which have
been poorly constructed or have rotted allowing
water to leak through must be replaced.
Available off-the-shelf in flat-packs, the
Keystone refurbishment tray combines ease
of handling, transportation and use with
complete effectiveness. It meets all current
building regulations and NHBC requirements.
Manufactured from polypropylene, the
Keystone refurbishment tray is 620mm wide by
280mm deep and is suitable for use in all brick,
block and timber-framed constructions. The
large bridging piece caters for cavity widths
from 50mm to 100mm.
Supplied flat, the pre-creased trays allow for
easy on-site folding to the required shape
including forming left and right hand end stops.
A locating lip facilitates accurate placement
during installation and the mastic sealant strip
(protected by release paper) ensures easy and
watertight overlap jointing.
Specifying
When specifying, the following wording is
recommended: “provide Keystone refurbishment
Cavity Tray system from Keystone Lintels
Limited, (+44 (0)1283 200150) to be installed
as per manufacturer’s instructions. Trays to be
folded, as instructions on tray, to form left and
right hand stop-ends”.
Refurbishment Cavity Trays
Code Size in mm Packs of:
RFT 620 x 280 10
27

CPD Online: www.keystonelintels.co.uk/cpd
Extended Range
Stainless Steel Lintels
The following lintels are also available in 3mm thick stainless steel, grade 304S15. Similar load tables apply for stainless steel (SS) lintels as for
galvanised lintels. The stainless steel range is available to suit all cavity widths
S/K (SS) HD/K (SS) S/K WIL (SS) HD/K WIL (SS) CFS/K (SS) CFS/K WIL (SS) X/K (SS)
S/K 215 WIL (SS) SB/K (SS) SL/K (SS) B/K (SS) SW/K (SS) RB/K (SS) BOX/K (SS)
Soffit Lintel Cant Brick Lintel Stepped Lintel
A Soffit plate can be supplied on all lintel
profiles to suit 50-165mm wide cavities.
The Cant Brick Lintel can be supplied to suit all
Lintel profiles for 50-165mm wide cavities.
All cavity Lintels in the Keystone range can be
supplied with a 20mm step upon request.
‘h’ nominal
95 nominal 100
20
Roller Shutter Lintels
The Roller Shutter Lintel can be supplied to suit
all wall constructions and loading conditions.
Contact Keystone Technical Department for
full specification.
A B C
dpc
Dimensions Required:
A =
B =
C =
H =
mm
mm
mm
mm
H
Lintel Length =
mm
95
28

From Europe’s largest manufacturer of Steel Lintels
29

Your custom-made world by
Welcome to the wonderful world of Keystone ‘Special’ Lintels. Keystone Lintels is a well-established brand within the
construction industry, and renowned for providing lintel solutions to architects, builders, merchants, and end-users. As
part of Keystone Group, Keystone Lintels is leading the way in bespoke Steel Lintel design and manufacture.
The Technical Team at Keystone are pushing back the boundaries in Steel Lintel design, providing custom-made lintels
with short lead-times. For further information on the following lintels or to discuss your ‘special ideas’ please contact
our technical department.
31

Full Arch Lintel
R
c
(clear span) a
Elevation
c
Lintel Dimensions:
Wall Construction:
Clear span a =
mm
Outer leaf
mm
Radius R =
mm
Cavity width
mm
End bearing c =
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
Segmental Arch Lintel
r
c
(clear span) a
Elevation
c
Lintel Dimensions:
Wall Construction:
Clear span a =
mm
Outer leaf
mm
Rise r =
mm
Cavity width
mm
End bearing c =
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
32

CPD Online: www.keystonelintels.co.uk/cpd
Venetian Arch Lintel
Elevation
r
c
(arch span) a2
(overall clear span) a1
c
Lintel Dimensions:
Wall Construction:
Overall clear span a1 =
mm
Outer leaf
mm
Arch span a2 =
mm
Cavity width
mm
Rise r =
mm
Inner leaf
mm
End bearing c =
mm
Plaster Key Requirements: (please tick)
Arch Type: (please tick)
Inside only
Full Arch
Both sides
Segmental Arch
None
Parabolic Arch
Support Posts: (if required)
Apex Arch
Height
mm
Gothic Arch
Apex Arch Lintel
r
c
(clear span) a
c
Elevation
Lintel Dimensions:
Wall Construction:
Clear span a =
mm
Outer leaf
mm
Rise r =
mm
Cavity width
mm
End bearing c =
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
33

Parabolic Arch Lintel
To construct a Parabolic Curve
D
E
C
1
A
r
B
Draw rectangle ABCD
Make DE = DA
Make CF = CE
Bisect AF to make point 1
Project a right angle off AF at point 1
to find small radius r,
and project further to find large radius R
R
r
c
(clear span) a
Elevation
c
Lintel Dimensions:
Wall Construction:
Clear span a =
mm
Outer leaf
mm
Rise r =
mm
Cavity width
mm
End bearing c =
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
34

CPD Online: www.keystonelintels.co.uk/cpd
Gothic Arch Lintel (Single Radius)
r
c
(clear span) a
Elevation
Radius
c
Lintel Dimensions:
Wall Construction:
Clear span a =
mm
Outer leaf
mm
Rise r =
mm
Cavity width
mm
End bearing c =
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Radius: (if known)
Inside only
Radius
mm
Both sides
None
Gothic Arch Lintel (Double Radius)
r
c
Lintel Dimensions:
Small Radius
(clear span) a
Elevation
Large Radius
Radius: (if known)
c
Clear span a =
mm
Large Radius
mm
Rise r =
mm
Small Radius
mm
End bearing c =
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
r
Small Radius
Wall Construction:
Outer leaf
Cavity width
Inner leaf
mm
mm
mm
Double Radius
Large
Radius
35

Corner Lintel
Section through corner
and post supported on
substructure
The Keystone Corner Lintel is
supplied as a ‘one piece’ fully
mitred and welded structural unit
for easy installation.
Fully Filled
Insulated Cavity
Factory mitred and
welded corner lintel
Location Spigot
Steel Corner Post
dimension by
Keystone
Technical Dept.
Cill notched
around post
Base Plate bolted to
substructure using
12mm dia fixing bolts
Factory fitted
Location Spigot
Steel Corner Post
supplied with Lintel
Dimensions by Keystone
Technical Dept.
Spot Welded
Plaster Key
DPC stepped across
cavity, laid under and
turned up back of cill
Cill detail
Base Plate
Heavy Duty
Corner Lintel
Dimensions Required:
A
Brick Reveal
A-B =
B-C =
A-C =
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
mm
mm
mm
B
Brick Reveal
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
C
Wall Construction:
Outer leaf
Cavity width
Inner leaf
mm
mm
mm
Support Post:
Height
mm
36

CPD Online: www.keystonelintels.co.uk/cpd
Bow Lintel (Projecting Reveals)
Span
C
A
Outshot
D
Brick Reveal
Straight Edge
Brick Reveal
B
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
C-D =
mm
Cavity width
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Support Posts:
Inside only
Height
mm
Both sides
None
Bow Lintel (Non Projecting Reveals)
A
Span
C
Outshot
B
Brick Reveal
D
Straight Edge
Brick Reveal
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
C-D =
mm
Cavity width
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Support Posts:
Inside only
Height
mm
Both sides
None
37

Square Bay Lintel
Keystone provide arches and bow
lintels, corner and sun lounge
lintels, as well as solutions for
splayed and square bay lintels.
Exploded isometric
view of Square Bay
Lintel supported on
substructure
250
Base Plate
Post dimensions by
Keystone Technical
Dept.
350
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
A
Brick Reveal
Brick Reveal
D
B
C
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
B-C =
mm
Cavity width
mm
C-D =
mm
Inner leaf
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
Support Posts:
Height
mm
None
38

CPD Online: www.keystonelintels.co.uk/cpd
Splayed Bay Lintel (Projecting Reveals)
Brick Reveal
Brick Reveal
A
D
Important Notes:
Do not allow
for bearing, this
will be added at
manufacturing stage.
Very accurate
measurements required.
B
C
Base Plate
Post dimensions by
Keystone Technical
Dept.
To Clients
specification
Xº
250
250
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
B-C =
mm
Cavity width
mm
C-D =
mm
Inner leaf
mm
A-D =
mm
A-C =
mm
Support Posts:
B-D =
mm
Height
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
Splayed Bay Lintel (Non Projecting Reveals)
Brick Reveal
Brick Reveal
A
D
Important Notes:
Do not allow for bearing,
this will be added at
manufacturing stage.
Very accurate
measurements required.
B
C
Base Plate
Post dimensions by
Keystone Technical
Dept.
To Clients
specification
Xº
250
250
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
B-C =
mm
Cavity width
mm
C-D =
mm
Inner leaf
mm
A-D =
mm
A-C =
mm
Support Posts:
B-D =
mm
Height
mm
Plaster Key Requirements: (please tick)
Inside only
Both sides
None
39

Keystone Sun Lounge Lintel
Did you know?
It is universally recognised amongst home owners and house builders that a Sun Lounge
is a more practical, user friendly room than a conservatory. Furthermore it is agreed
that a Sun Lounge floor area can be included in the overall measurement of your house
size, adding much more value to your home.
A Sun Lounge Lintel is an easy way to add space at low cost when building a new house, or extending a property. An
extra room rather than an add-on, a Sun Lounge is comfortable all year round while allowing you to watch the seasons
come and go in comfort.
What does a Sun Lounge offer you?
A Sun Lounge will blend with the existing appearance of your home. It’s easy to construct, using materials similar to your
house. Also it adds genuine floor space, it is structurally sound and adds value immediately.
Is the Sun Lounge the same as a conservatory?
No! A Sun Lounge is more competitively priced than a conservatory, is more visually appealing, is easier to clean, and is
not a bolt on “extra”.
Much better heat retention in winter
Protection from the blazing summer sun
Noise reduction associated with rainfall on a conservatory roof
What do Keystone offer?
The construction of a Sun Lounge has been simplified by the introduction of an Keystone Lintel. It is a one piece unit
which removes the need for local engineering, allows architects to design the Sun Lounge to suit the property, and will
keep the cost sensible.
The Keystone Sun Lounge Lintel is designed and delivered ready for erection.
40

CPD Online: www.keystonelintels.co.uk/cpd
Spot Welded Plaster Key
Fully Filled Insulated Cavity
It’s as easy as...
Steel Corner Posts
Dimensions by
Keystone Technical Dept.
Includes Base Plate
Factory Fitted Location
Spigots
1 2 3
The Sun Lounge Lintel can
be supplied in any size to
suit your requirements
FASTRACK autoCAD files
can be downloaded from
our website at:
www.keystonelintels.co.uk
Width (W)
Length (L)
Sun Lounge Int Width (W) Int Length (L)
A 3m 3m
B 3m 3.6m
C 3.6m 3.6m
D 3.6m 4m
E 4m 4m
F 4m 4.6m
41

Standard Sun Lounge Lintel - Construction Data
Roof Construction:
Slates or tiles to match existing on 25x50mm battens on one layer sarking felt on 38x150mm rafters @
400mm CRS with 38x50mm battens to U/S of rafters to maintain 50mm airgap within roof construction
when incorporating 150mm fibre glass quilt insulation. 50x100mm Ridge Plate shot fixed to T/S ridge
beam. 50x100mm Wall Plate securely strapped down to wall using 5x30mm galv ms straps by Cullen or
equal @ 1200mm CRS. 100x25mm diagonal bracing positioned both sides of roof. 38x100mm collar ties @
400mm CRS. 50x250mm hip rafters. TG and V redwood sheeting ceiling painted with Class 1 SSF varnish. All
structural timber to be C16 or greater and must be stamped accordingly.
Lintel Specification:
Keystone HD/K factory Sun Lounge Lintel supported on MS posts designed by Keystone Tech. Dept. located as
indicated on plan.
Structural Rigidity:
Roof Anchorage - First rafter and collar tie to be bolted to main wall at 450mm CRS using Rawl bolts
or similar proprietary fixing.
MS support posts and factory fitted Base Plate to be bolted down on top of solid footings built up to
300mm below finished floor level.
Wracking resistance provided using 9mm plywood secured to U/S of rafters and collar ties prior to any
decorative finishes.
Where a raised or vaulted ceiling is required a Keystone Ridge Beam Cradle must be used.
Construction Details:
Provide 150mm fibreglass quilt insulation between roof rafters and collar ties. Insulation to be carried over
top of cavity wall and pushed into soffit box to prevent a cold bridge. Install Cullen G400 eaves ventilators
to provide a continuous air path for roof space ventilation between roof and insulation and roof underlay at
eaves equivalent to 10,000mm 2 /m with Cullen G1200 over facia ventilator to provide ventilation to roof space
equivalent 10,000mm 2 /m in accordance with Bld. Regs. Approved Document F2 1995 and or BS 5250: 1989.
Fixed in accordance with manufacturers instructions.
Provide stepped cavity tray across wall directly above Code No.4 flashing, where new roof abuts wall. Note
all lead to be treated with patination oil. Rainwater goods facia and soffit to match existing. RC cill with
DPC @ rear, ends and under. Wall DPC located min. 150mm above ground level. 300mm solid blockwork
footings. 250mmx600mm concrete foundation. Form new opening from existing dwelling into Sun Lounge
to client’s requirements.
Provide vertical DPC where Sun Lounge window abuts existing wall. Where new wall abuts existing, new
cavity to be continuous with existing cavity. Provide 35mm polystyrene insulation between MS post and
against inner leaf where post is inside cavity, to prevent a cold bridge. All glazed panels to doors and side
panels with glazing less than 1500mm above floor or ground level to be glazed with safety glass to BS
6206: Class B and C.
Provide 300mm cavity wall construction with 60mm Rigid Polystyrene Insulation - Wall ties with insulation
clips to be spaced 750mm horizontal and 450mm vertical CRS. Form new external steps @ doorway to
comply with current Bld. Regs. Any new heating pipes to be insulated with an insulation of thickness of not
less than the diameter of the pipe - insulation to BS 5422:1977.
Provide 100mm dia stormwater drain, laid to fall 1:60, drain pipe to be surrounded with 150mm pea gravel.
All drain pipes to comply with BS 4660 - connected to existing system.
Specification:
Keystone HD/K factory fabricated Sun Lounge Lintel - mitred and welded
complete with factory fitted location spigots for easy installation - on
MS posts designed by Keystone Technical Dept complete with Base Plates
secured to solid footing 300mm below finished floor level.
On large Sun Lounges and in exposed locations the Keystone Inverted
Support Frame is supplied as specified by Keystone Technical
Department.
42

CPD Online: www.keystonelintels.co.uk/cpd
Standard Sun Lounge Lintel - Measurement Sheet
A
Brick Reveal
Brick Reveal
Base Plate
Xº
To Clients
specification
Post dimensions
by Keystone Technical
Dept.
250
250
Dimensions Required:
Plaster Key Requirements: (please tick)
B
E
A-B =
mm
Inside only
B-C =
mm
Both sides
C-D =
mm
None
D-E =
mm
C
D
E-F =
A-F =
mm
mm
Wall Construction:
Outer leaf
mm
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
A-E =
B-F =
B-E =
mm
mm
mm
Cavity width
Inner leaf
mm
mm
C-E =
mm
Support Posts:
B-D =
mm
Height
mm
Raised Ceiling - Optional extra
Exploded Isometric View
Keystone Ridgebeam Cradle
Ridgebeam Cradle secured to
internal flange of lintel using
2 no. M12 bolts
HD/K factory fabricated Sun
Lounge Lintel
MS posts designed by Keystone
Tech. Dept. c/w Base Plate
Where a Cathedral or Vaulted
ceiling is required the Keystone
Ridgebeam Cradle is supplied to
support the roof structure and resist
roof spread.
Footing
Foundation
43

Bow Sun Lounge Lintel
Exploded Isometric View
Keystone Bow Lintel as
specified by Technical Dept.,
factory fabricated and fitted
with location spigots.
MS posts designed by Keystone
Technical Dept. c/w Base Plate
secured to substructure 300mm
below finished floor level.
Brick Reveal
Brick Reveal
A
Base Plate
Post dimensions by
Keystone Technical
Dept.
250
D
250
B
X
C
Y
Z
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
B-C =
mm
Cavity width
mm
C-D =
mm
Inner leaf
mm
X-Y =
mm
X-Z =
mm
Plaster Key Requirements: (please tick)
Support Posts:
Inside only
Height
mm
Both sides
None
44

CPD Online: www.keystonelintels.co.uk/cpd
Venetian Arch Sun Lounge Lintel
Specify:
Keystone factory mitred and
welded Venetian Arch Square
Bay Lintel and posts with
factory fitted location spigots
for easy installation.
Base Plate
Post dimensions by
Keystone Technical
Dept.
250
350
A
Brick Reveal
Brick Reveal
D
B
Arch Span (s)
C
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
Keystone Sun Lounge Sample Plans
Dimensions Required:
Wall Construction:
A-B =
mm
Outer leaf
mm
B-C =
mm
Cavity width
mm
C-D =
mm
Inner leaf
mm
Arch Dimensions:
Support Posts:
Arch Span (s) =
mm
Height
mm
Rise (r) =
mm
Arch Type: (please tick)
Full Arch
mm
Plaster Key Requirements: (please tick)
Segmental Arch
mm
Inside only
Parabolic Arch
mm
Both sides
Apex Arch
mm
None
Gothic Arch
mm
45

Apex Sun Lounge Lintel
Exploded Isometric View
Eaves beam supporting
Wall Plates bolted to
framework
Steel purlin supporting
Wall Plate bolted to
framework
H
SHS Apex gable support frame to be sized by Keystone Tech.
Dept. on Base Plates bolted to substructure
Main Wall of House
E
A
Brick Reveal
Brick Reveal
D
B
w
C
Important Notes:
Do not allow for bearing, this will be
added at manufacturing stage.
Very accurate measurements required.
Dimensions Required:
A-B=
B-C=
C-D=
C-E=
mm
mm
mm
mm
Height from top of substructure
to underside of lintels (H)
External frame width of patio
doors if applicable (W)
Roof pitch
mm
mm
46

Brick Arch Sets
Keystone provide a variety of special lintels
and ‘brickwork support systems’. A new
addition to the range is Keystone ‘Brick
Arch Sets’, where the brick-slips are tapered
onto a pre-furbished lintel.
Keystone offer a ‘brick matching’ service
where the complete brick arch set is
designed and customised to your specific
needs. Pre-formed, factory-finished steel
lintels by Keystone are cost-effective and
less time-consuming on-site.
(r)
Clear Opening (s)
Gothic Arch
Information Required
Brick type
Width of joint
Angle of skew (a)
Height of brick arch (h) 1
1 1 / 2
Other
Precision cut bricks
Load bearing lintel
Lightweight for fast build programmes
Optional brickclad soffit
Optional centrestone feature
Optional insulation
Various shapes available
(r)
Clear Opening (s)
Parabolic Arch
Type of brick arch
Flat
Parabolic*
Gothic*
Full
Segmental*
Bulls Eye
Clear brickwork opening (s)
Brick rise (r)*
Clear Opening (s)
(r)
Clear Opening (s)
Segmental Arch
Select from section below if soffit is required
returned or non returned - Please tick box
100mm
100mm
Galvanised
powdercoated
arch set
Galvanised
powdercoated
arch set
Full Arch (Bullseye)
(h)
a
Non Returned Soffit
Returned Soffit
Clear Opening (s)
Optional Extras - Please tick box if required
Flat Arch 1 1 /2 brick deep
Brick Centrestone
Stone Centrestone
Clear Opening (s)
(h)
a
t
Distance (t)
1. Projecting Top
mm
Full Arch
Clear Opening (s)
Flat Arch
Distance (f)
2. Projecting Front
mm
f
3. Projecting Bottom
Distance (b)
mm
b
47

Windposts
Windpost Design
Keystone Windposts are manufactured from grade 304 stainless steel (grade 316 is available
if required). The Keystone Technical Team will provide full product specification and
schedules.
All three Windpost designs are available in shorter lengths to provide the same level of
stability to parapets or below windows, commonly termed Parapet or Spandrel Posts
respectively. These posts are designed as cantilevers.
Keystone Windpost Systems
Keystone Windposts span vertically between
floors to provide additional lateral support
for large panels of brickwork or large panels
with openings. It is often difficult to provide
suitable justification that masonry walls have
lateral stiffness and therefore construction
would traditionally be strengthened by the
addition of thicker walls or by including
columns, to effectively shorten the span of the
masonry panel.
U type windpost
for cavity installation
DU type windpost
for cavity installation
LP type windpost for
installation into the inner
leaf of the blockwork
Keystone manufacture three types of windpost.
The U Windpost is installed within the
cavity and will normally span between floor
structures, with the same principle applying
to the DU Windpost. Both designs leave the
inner leaf of the cavity wall undisturbed. The
LP Windpost is designed to be built into the
inner skin of the cavity wall and normally
span between floor structures.
U Tie
L50 Tie
L75 Tie
L Shear Tie
L100 Tie
Keystone U type
windpost shown
fixed at the base
to concrete and
at the top to the
underside of a
steel beam.
A range of
top and base
connectors can be
designed to suit
specific project
requirements.
All Keystone Windposts are supplied with specifically designed base and upper connections
and fixings. They are also supplied with a suitable number of wall-ties which will vary in
relation to the post type used and the cavity width. There are five types:
U Tie – For use with U & DU Windposts.
L50 Tie – For use with LP Windposts (50mm cavity).
L75 Tie – For use with LP Windposts (75mm cavity).
L100 Tie – For use with LP Windposts (100mm cavity).
L Shear Tie – For use with LP Windposts.
L Shear Tie can be supplied with a de-bonding sleeve if the windpost is positioned at a vertical
movement joint.
48

CPD Online: www.keystonelintels.co.uk/cpd
Windposts
Windpost Types
U Windpost DU Windpost LP Windpost
Diagrams show a typical wall construction at intermediate floor level showing the three Keystone Windpost types bolted to a concrete building frame.
Windpost Loadings
The loadings quoted for the windposts are derived from an allowable stress value of 181N/mm 2 and a deflection limit of span/360 (the lesser of the
two resultant figures is used as the quoted figure).
Please note the quoted loadings are working/characteristic loads.
Keystone Windpost profiles and dimensions.
U Windpost and Ties
DU Windpost and Ties
LP Windpost and Ties
b
b
a
t
t
L Shear Tie
t
a
t
t
a
b
L50/L75/L100 Tie
U Tie
U Tie
Proportions and performance of U, DU and LP windposts.
Windposts can be made to order at various sizes on a project basis. Post taken as a simply supported beam.
SWL’s quoted are assuming adequate base and top fixing to concrete. For other substrates please contact the Keystone Technical Team.
49

Keystone “Special” Projects
Britain’s Most
Expensive
New Home
Lintels:
Special Arch Lintels &
Colonnade Supports
Updown Court, a neo classic Georgian style
home designed by US architects John B
Scholz, provided enormous opportunities
for creative lintel design. Keystone designed
and manufactured hundreds of Special Arch
Lintels and Colonade Supports throughout
this magnificent mansion. We also supplied
numerous Standard, Heavy Duty and Extra
Heavy Duty Straight Lintels. At £70 million
it is reported to be the most expensive new
home ever built in Britain.
Keystone
Take “Pride in
the Job”
Lintels:
Special Bow & Corner
Lintels
Keystone supplied bespoke lintel solutions to
‘Knockantern Green’, an NHBC award-winning
project.
“Patton Homes acknowledges the invaluable
support provided by Keystone Lintels, who
worked as a member of the site team.”
David M. Patton
Chairman, Patton Homes
50

CPD Online: www.keystonelintels.co.uk/cpd
Keystone “Special” Projects
Award-winning
Quay-stone
Lintels:
Special Bow Lintels
This project received a UK Award for the “Best
Use of a Brown Field Site.”
“The Greggs Quay development called for
apartments designed to a very high specification.
Creative lintel designs helped bring the original
design concept to a reality”
Mr Colin Stewart
Partner, McAdam Stewart Architects
“Too often, using ‘special’ designs in a project
is an invitation for delays. Using Lintels from
Keystone however gave my site foreman
confidence. The steel lintels required for the
unusual window head features were supplied
correctly and on time.”
Mr Des Savage
Director, Savage Bros.
Mission
Impossible
Lintels:
Cantilevered Segmental
Arched Corner Lintel
Keystone produce Special Lintels in
3-5 days... The impossible takes 7!
“Ordering this special cantilevered arched corner
was a pleasure. Details like this can often cause
expensive delays between site measurement,
design and manufacture. Using Lintels from
Keystone, we alleviated these problems and
have now constructed an entrance which was
at first thought to be impossible!”
Gerry Gray
51

Keystone “Special” Projects
Commercial
Creativity
Lintels:
Balcony Support Details
on Large Commercial
Project
Plans
“Keystone’s ability to design and deliver
standard and custom made lintels quickly and
efficiently has made this job so much easier. A
product and service we highly recommend.”
Mr S Jones
McAleer & Rushe
The Key to the
Manor
Lintels:
Gothic Arch Lintels
This private residence is a mixture of medieval
inspiration and modern lintel design.
52

CPD Online: www.keystonelintels.co.uk/cpd
Keystone “Special” Projects
Curve It Like
Keystone
Lintels:
Special Bow Bay, Arch &
Square Bay Lintels
Keystone provided a unique lintel solution
for this prestigeous development
- a ‘bow-bay’ lintel.
“Keystone supplied a bespoke ‘bow-bay’ lintel for this
project. We were extremely satisfied with the outcome,
and this design has generated much acclaim.”
Adam McAteer
Kevin Cartin Architects Ltd
Restoration
Excellence
Lintels:
Cantilevered Corbelled
Brickwork Support System
“When converting this old dwelling into flats, we
discovered the timber brickwork support detail
on the second floor had deteriorated badly. After
several restoration proposals were considered
non-feasible, we called in Keystone. Their engineer
made one site visit and came up with this
solution. Five days later they delivered the goods.
An excellent product with an excellent service.”
Arthur Rogers, A & J Rogers
53

Keystone “Special” Projects
Access All
Areas
Lintels:
Extra Heavy Duty Flat
Parabolic Arch Lintel
Three acre housing development sites near
busy town centres are hard to find, and all too
often have limited access. When Development
Architect Roger Sally approached this
access problem he contacted Keystone for
assistance.
“Keystone’s Technical Department designed
these 8000mm span Flat Parabolic Arch Lintels
to support the apartment above and provide
an attractive archway to the landscaped
courtyard of townhouses behind.”
Roger Sally
Teague & Sally Architects
Make a
Grand Entrance
Lintels:
Venetian Gothic Arch Lintel
“This prestigious hotel development required a
lot of brickwork support systems and intricate
lintel details. Ordering these with Keystone
gave our Contracts Manager peace of mind.
Once agreed the lintels were delivered to site
without delays.”
Vincent McGlew
54

CPD Online: www.keystonelintels.co.uk/cpd
Keystone “Special” Projects
Every Lintel
Helps
Lintels:
Full Arch Lintels
When ‘shopping-around’ for the perfect lintel,
‘check-out’ Keystone - the lintel experts!
Step It Up
Lintels:
Heavy Duty
Corbelled Lintels
“When presented with this corbelled detail in
my client’s brief I contacted Keystone’s creative
Technical Department. I am delighted with their
solution and excellent technical service.”
Jennifer Johnston
55

Keystone “Special” Projects
Keystone Swing
into Action
Lintels:
Arch, Corner & Bay Lintels
“The prestigious and internationally acclaimed
Royal Portrush Golf Club required something
special in its design. The help and advice given
by Keystone’s Technical Department encouraged
me to include some quite complex details. I am
delighted with what has been achieved.”
Mr Kieran Mullan
Senior Partner, GM Design
Thatch Magic
Lintels:
Special Tapered Arch
Lintel
Keystone designed and supplied the featurepiece
tapered arch on the front of this house,
as well as square bay and corner lintels. Their
solution for this bespoke arch was technically
brilliant removing the need for complicated
and expensive conical formwork.
Plans
56

CPD Online: www.keystonelintels.co.uk/cpd
Keystone “Special” Projects
Always
Accommodating
Lintels:
Special Bow & Arch
Lintels Supplied to Large
Commercial Developments
“Ordering the standard and custom-made
bow lintels on this project was made easy by
using Keystone’s fast and efficient scheduling
service. Once agreed, the lintels were delivered
to site without any delays.”
Mr K Clarke
Louisville Properties
“Keystone deliver their lintels quickly and
efficiently direct to site. Even the special
arched lintels were designed and delivered
within five days. This combination of product
and service was invaluable to our on-site
team.”
Mr C Crossley
Glenistar Properties
Let the
Sunshine In
Lintels:
Arched Sun Lounge
Lintel Supplied to
Private Development
“Keystone’s ‘Can Do’ attitude certainly shone
through on this project. We had been told that
this couldn’t be achieved without building
substantial piers at each corner. Keystone
provided a lintel solution delivered to site in
days.”
Colin Smyth
Contracts Manager
57

Roof Windows
The UK & Ireland’s
Only Indigenous
Roof Window
Manufacturer
Also available from
58

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Vertical Bi-Lite Flat Roof System White Finish
Ridge
Electric Operation
Integral Blind
Smoke Ventilation
Combination Flashings
NEW Generation
Keylite Roof Window Key Features
1 Lowest Standard Fitting Position
2 NEW Ergonomic Handle
3 NEW Quick Fit Brackets
4 NEW One Piece Bottom Apron
5 Enhanced U-Value
6 Part F Ventilation Compliance
7 BBA Approval on 01-09 Window Sizes
8 NEW Engineered Window Components
9 NEW Triple Sealing
10
Enhanced External Flashing Aesthetics
www.keyliteroofwindows.com
Order your blinds online:
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Ballyreagh Industrial Estate, Sandholes Road, Cookstown, BT80 9DG Tel: +44 (0)28 8676 2184 Fax: +44 (0)28 8676 1011 Email: info@keystonelintels.co.uk
Ryder Close, Cadley Hill Industrial Estate, Swadlincote, South Derbyshire, DE11 9EU Tel: +44 (0)1283 200 150 Fax: +44 (0)1283 223 352 Email: info@keystonelintelsuk.com
Unit 30, Rosemount Business Park, Ballycoolin Road, Finglas, Dublin 11 Tel: +353 (0)1 822 3333 Fax: +353 (0)1 822 3366 Email: info@keystonelintels.ie
www.keystonelintels.com
Certificate No FM 21541
The information contained in this brochure was accurate at the date of publication. Keystone Lintels Limited, however, reserve the right, while maintaining the essential
performance of the lintels described, to introduce at any time modifications and changes of details as may be deemed necessary to improve the lintels described.