CAVITY WALL TIES - mkm.strawberryadm...

CAVITY
WALL TIES
for traditional brick/block construction

Stainless Steel
All Ancon and Staifix wall ties are
manufactured from Stainless Steel for
its corrosion resistance and strength.
The use of Stainless Steel means that
no costly remedial measures are required
during the lifetime of the structure.
Approvals
Look for these logos.
These products are
approved by the British
Board of Agrément.
These products meet the
technical requirements of
the National House
Building Council.
These products are Type A
ties and suitable for internal
separating walls to
Approved Document E.
Safety
All Ancon and Staifix wall ties have specially
designed safety ends to reduce the risk of
injury during handling and installation.
Correct Installation
Wall ties should be pressed down in, and
then surrounded by, fresh mortar.
In order to show more details of the
application, mortar has been excluded from
the photography in this literature.
rev. 0508 v.1
MKM acknowledges that any accreditations/certifications are attributed to the brand/manufacturer.
MKM has compiled this booklet from information supplied by manufacturers in good faith and accepts no responsibility for any errors or omissions in this literature.

Cavity Wall Ties
for traditional brick/block construction
Wall ties are an important element in the
stability of cavity walls. The correct
selection, spacing and installation of ties is
essential to avoid damp penetration and
the distortion or cracking of brickwork.
Many factors including cavity width, type
and height of building, and location must all
be considered in the selection of the most
appropriate tie.
BS1243: Metal ties for cavity
wall construction
BS1243 was withdrawn in 2005. Butterfly
and Double Triangle ties to BS1243 do not
meet a current British Standard. Wall ties
should be selected to BS5628-1: 2005
(see page 4).
Pages 4 and 5 provide information on wall
tie selection, density and positioning, tie
length, embedment depths and installation.
3

Wall Tie Selection to BS5628-1: 2005
Maximum
Building Geographical
Type Application Density Height Location
Type 1 Heavy duty tie suitable for 2.5 ties/m 2 Any
3-4 ties/m Height
at unbonded
edges
most building sizes and
types. Not very flexible
and not recommended for
applications where there is
expected to be excessive
differential movement
between leaves
Type 2 General purpose tie for As Type 1 15m
domestic and small
commercial buildings.
May be suitable for
buildings exceeding 15
metres if shown to be
adequate by calculation
Type 3 Basic wall tie generally as As Type 1 15m
Type 2 above
Type 4 Light duty wall tie As Type 1 10m
suitable for box-form
domestic dwellings with
leaves of similar thickness
Type 6* Timber frame tie suitable 4.4 ties/m 2 15m
for domestic houses and
small commercial
developments of up to
3-4 ties/m
at unbonded
edges
four storeys
For complete information refer to BS5628-1: 2005 and BS5268-6: 1: 1996
*Based on BS5268-6: 1: 1996
Suitable for most sites.
However, for relatively
tall or unusually shaped
buildings in vulnerable
areas, the tie provision
should be calculated
Suitable for buildings
on flat sites where the
basic wind speed is up
to 31m/s and altitude is
not more than 150m
above sea level
Suitable for buildings on
flat sites in towns and
cities where the basic
wind speed is limited to
25m/s and altitude is
not more than 150m
above sea level
Suitable for flat sites in
towns and cities where the
basic wind speed does
not exceed 25m/s and
altitude is not more than
150m above sea level
Suitable for flat sites in
towns and cities where the
basic wind speed does not
exceed 25m/s and altitude
is not more than 150m
above sea level
≤ 31m/s
≤ 25m/s
Information taken from BS 6399-2: 1997 Code of
Practice for Wind Loads
Wall Tie Selection to Approved Document E
Type
Application
Type A
Suitable for internal separating walls of new build attached dwellings
up to any height*
For complete information refer to Approved Document E - Resistance to the Passage of Sound
*Restrictions may apply to particularly tall buildings and coastal/exposed sites
Length of Tie and Embedment
Wall ties should be of the correct length to ensure they are properly
embedded in the masonry. Ancon recommends tie lengths which
achieve an embedment of between 62.5mm and 75mm.
A tie, 225mm long, would be the minimum length recommended
by Ancon for a 100mm cavity.
62.5mm + 100mm + 62.5mm = 225mm
The embedment depths for Staifix-Thor Helical thin-joint ties differ
from the information above.
Insulation retaining clip
Multiple drips
4
Embedment
Cavity width
Embedment

Density and Positioning of Ties
Typical Layout of Wall Ties Indicating Maximum Spacing
Standard spacing for cavity brickwork 900mm x 450mm centres in a staggered pattern (2.5 ties per m 2 )
TECHNICAL
INFORMATION
Head restraints
at centres to
suit wind
loading
Horizontal movement joint
450-900mm
Vertical
movement
joint
225mm
450mm
450mm
225mm
450mm
300mm
Usually 225mm
to suit block
courses
300mm
Usually 225mm
to suit block
courses
Debonded
ties at
edges
450mm
225
mm
225
mm
225
mm
900
mm
225
mm
For walls in which both leaves are 90mm or thicker, ties should be used at not less than 2.5 per square metre
(900mm horizontal and 450mm vertical centres). This spacing may be varied by building regulations. Ties should
be evenly distributed over the wall area, except around openings, and should be preferably staggered.
At vertical edges of an opening, unreturned or unbonded edges, and vertical expansion joints, additional ties should
be used. Such ties should be located at 300mm vertical centres, positioned not more than 225mm from the edge.
Installation of Ties
Wall ties should be pressed down in, and surrounded by, fresh
mortar. In order to show more details of the application, mortar has
been excluded from the images in this literature.
To ensure cavity wall ties are effective at tying the leaves together
they should be installed as the inner leaf is constructed and not
simply pushed into a joint.
Ties should be installed with a slight fall to the outer leaf, never
towards the inner leaf as this could provide a path for moisture to
cross the cavity.
The drip part of the tie should point downwards and be positioned
near the centre of the open cavity. Ties with multiple drips, like the
Staifix RT2, can often be positioned centrally as part of the drip will
normally be near the centre of the open section of a partial fill cavity.
Installed ties should be clear of mortar droppings to allow the drip to
function and prevent water from crossing to the inner leaf of masonry.
5

Staifix HRT4 Tie (Type 4/Type A Tie)
Length (mm) Cavity (mm)
200 50-75
225 76-100
Patent Nos. GB 2359831
IE 83574
Application
Type 4 wall tie for use in the external walls
of houses not greater than 10 metres in
height. Type A tie for internal separating
walls of buildings of any height. Please refer
to page 4 for more details.
REPLACES BS1243
BUTTERFLY TIE
Staifix RT2 General Purpose Tie (Type 2 Tie)
Length (mm) Cavity (mm)
200 50-75
225 76-100
250 101-125
Patent Nos. GB 2359831
IE 83574
Application
Type 2 wall tie for use in the external walls
of houses and small commercial
developments not greater than 15 metres
in height. This tie is unsuitable for internal
separating walls of new build attached
dwellings. Please refer to page 4 for more
details.
6
REPLACES BS1243
DOUBLE TRIANGLE TIE

Ancon ST1 Heavy Duty Tie (Type 1 Tie)
Length (mm) Cavity (mm)
200 50-75
225 76-100
250 101-125
275 126-150
300 150*
*With greater embedment to simplify installation
UK Patent Nos. 2 255 358
2 260 348
2 260 349
MASONRY TO MASONRY
WALL TIES
Application
Type 1 wall tie for use in the external walls
of buildings of any height. This tie is
unsuitable for internal separating walls of
new build attached dwellings. Please refer
to page 4 for more details.
REPLACES BS1243
VERTICAL-TWIST TIE
Staifix Universal Insulation Retaining Clip
Application
Insulation retaining clip for use in partial fill
cavities with all* standard Ancon and Staifix
wall ties.
*The TJ Clip should be used with Staifix-Thor Helical TJ2 ties.
Flat Ties
HRT4
RT2
Double Triangle
ST1
7

Staifix Starter Tie
for joining new walls to existing masonry
Application
Screw-in tie supplied with an 8mm nylon
plug for joining new masonry to existing
walls without the need for jointing.
Ideal for the construction of conservatories,
extensions and garden walls.
AVAILABLE
SINGULARLY - NO
JOB TOO SMALL
8

Staifix Starter Tie Installation
1
Starter Ties should be fixed at
225mm vertical centres in a line
central to the new leaf. Drill 8mm
diameter holes, 45mm deep into
the existing wall at an angle of 30˚
to the horizontal.
2
Bend the tie into the bed joint
of the new brickwork. Build the tie
in ensuring it is surrounded
by mortar.
This tie is suitable for use in masonry up to 8 metres in height. For buildings in particularly exposed areas,
especially if the wall is higher than 5 metres or the construction is single leaf, it would be advisable to carry
out a check calculation using the wind code and increase the density of starter ties if necessary.
Staifix Cavity Starter Tie
for the build of a new inner leaf of blockwork
Application
Screw-in tie that simplifies the build of an inner leaf of blockwork within an
existing structure. Supplied with an 8mm nylon plug and a neoprene ‘o’ ring.
Staifix Cavity Starter Tie Installation
IDEAL FOR BARN
CONVERSIONS
Drill an 8mm diameter hole
horizontally into existing outer leaf
of masonry. Position the hole such
that when the tie is installed the
safety end will be located in the
bed joint of the new inner leaf of
blockwork.
Insert the nylon plug. Slide the
neoprene ‘o’ ring on the tie and
screw into the plug. Build the tie
into the inner leaf of blockwork
ensuring it is surrounded by mortar.
9

Staifix Timber Frame Tie (Type 6 Tie)
for fixing masonry to timber frames
To Suit Cavities (mm)
50, 75, 100
Application
Cavity wall tie for use in the construction of
timber-framed buildings up to 4 storeys in
height. Supplied complete with an annular
ring shank nail.
CRANKED, TO
EASE INSTALLATION
10

Installation
1
Position the tie on fresh mortar in
the bed joint of the outer leaf of
masonry with the upstand against
the timber.
2
Hammer the nail, through the hole
in the upstand, into the timber
framework.
3
Build the tie into the bed joint of
the new masonry ensuring it is
surrounded by mortar.
Density of Timber Frame Ties
Timber Frame Ties should be installed at a density of 4.4 ties per
square metre in buildings where the basic wind speed does not
exceed 25m/s (BS6399-2: 1997 Code of Practice for Wind Loads).
The density should be increased to 7 ties per square metre in more
severe situations.
11

References for Bespoke Ancon Wall Ties
Ancon wall ties may be specified and ordered
by using a reference letter for the tail, shank
and head of the tie.
Example using
Reference System
Tail D
Shank P
Head 21
Ancon DP21
wall tie
TAIL
Most can be used
at either end of tie
S _ _
SHANK
_ D _
50
HEAD
10
10
30
30
10
20
8x30mm slot
_ _ V
_ _ U without slot
7mm diameter
hole
_ _ B
_ P _
L
_ _ 21
To fit 21/18
Omega Channel
25mm
L _ _
W _ _
10mm
L
L
P _ _
D _ _
6x60mm welded
dowel
_ V _
_ F _
L
10mm
To suit channel
_ _ 25 To fit 25/14
_ _ 28 To fit 28/15
_ _ 30 To fit 30/20
_ _ 36 To fit 36/8
_ _ 38* To fit 38/17
*Tie will be 25mm wide
_ _ X
7mm diameter
hole
260mm
T _ _
10mm
15mm
15mm
10mm
Y _ _
6x60mm loose
dowel
M_ _
_ H _
105mm
_ _ G
6.5mm
diameter holes
6x60mm loose
dowel
Ancon Remedial Wall Ties
MM63
Lengths 195, 220, 250,
300mm
RM63
Lengths 195, 220, 250,
300mm
AC31
Lengths 175, 200, 225mm
AC31C
Lengths 175, 200, 225mm
HAVE A
QUESTION CALL
0114 238 1 238
Setting tools, resin cartridges, resin guns and mixing nozzles are all
available. Contact Ancon for more details on our range of remedial
wall ties and ancillary products.
12

Staifix-Thor Helical Crack Stitching Kit
for the permanent repair of cracked masonry
500mm
500mm
Wall Slot Bar
Thickness Depth Depth
102mm 30mm 20mm
215mm 40mm 30mm
THE HIGH STRENGTH,
NON-DISRUPTIVE REPAIR
SOLUTION
500mm
500mm
Application
This kit contains all the necessary
components to permanently repair vertical
or stepped cracks in masonry.
•Grout mixing paddle
•Cementitious grout (3 litres)
•Grout applicator gun
•Flat grout nozzle
•Stainless steel helical bar (10 x 1000mm)
•Finger trowel
Notes:
1. This system is also suitable for rendered/plastered walls
2. Vertical spacing is normally every 4 to 6 brick courses
(300 - 450mm), however this should be checked with the
structural engineer
3. Where cracks are within 500mm of corners or reveals, the bar
should be bent and bonded 100mm around the corner
4. If two or more cracks are close together, bars can be lapped.
Laps should be at least 500mm and the bar should extend
500mm from the outer cracks
13

Installation
It is essential that the cause of the cracking is established by a structural engineer
and then eliminated, prior to the installation of this system.
1
2
3
Cut a slot in the mortar joint to the
specified depth that extends just over
500mm each side of the crack
(recommended equipment: Twin-bladed
diamond-tipped wall chaser). Ensure the
mortar is completely removed to reveal
the top and bottom faces of the
masonry. Remove all loose mortar from
the slot and flush with clean water.
Connect the paddle to a power drill,
blend the components of the grout
together in the tub and load into the gun.
Apply a continuous bead (approximately
10-15mm thick) to the back of the slot
using the flat grout nozzle.
Push the helical bar into the face of the
grout, to the depth specified, so that
the bar extends 500mm each side of
the crack.
4
5
Apply a second, continuous bead of
grout to the slot, ensuring the bar is
covered. With the finger trowel, force the
grout back into the slot 10mm from the
surface, and ensure the bar/grout
composite is tightly packed.
Make good the bed joint and fill the
vertical crack with an appropriate filler
or mortar.
14

Helical Nails for Pitched Roofs
European Patent No. 1307303
Super-7 Thor-Helical Nails
Super-7 nails install flush to the
counterbatten. They are manufactured
from stainless steel and are engineered
with the precise Thor-Helical patented
helix, and so provide maximum
corrosion resistance and excellent
holding power. They are stocked in six
standard lengths and meet the technical
requirements of the NHBC.
15

Nail Lengths
Stocked Lengths (mm)
140, 150, 160, 165, 175, 185
Note: Other lengths are available in increments of 5mm
Pack Sizes
Nail Length
Quantity per Box
160mm and under 400
165mm and above 200
Super-7 Alignment Tool
This innovative Alignment Tool vertically
aligns and centres a nail on the
counterbatten to rafter arrangement,
improving build quality.
The tool features a levelling indicator to
identify a vertical plane.
Recommended Nail Length
and Fixing Centres
This information should be calculated
using HeliCalc, a free web-based
program available at www.helicalc.co.uk.
Users simply input details of their site
location and roof construction, and
HeliCalc calculates the length, density
and quantity of Super-7 nails required
for the project. Alternatively, contact
Ancon with your project details.
Note: HeliCalc results are specific to Super-7 Thor-Helical
nails. The data is calculated using a design method, formulated
by Ancon Ltd and independently approved by the Building
Research Establishment, which is applied to the results of a
comprehensive and independent test programme carried out by
CERAM Building Technology. Wind load calculations are to
BS6399: Part 2: 1997. Snow load calculations are to BS6399:
Part 3: 1988. Partial safety factors are from National Annexes to
Eurocodes 0 and 5 and are applied in respect of timber
connections, dead loads, wind loads and snow loads.
Test Results
Test data is available on request.
Patent pending
90˚
Two widths to
accommodate
38mm and 50mm
counterbattens
Top, with level to ensure
correct angle of entry
Eyelet to allow tool
to be secured to
person/structure
Super-7s can be hammered in or
power-driven. SDS drill attachments
are available.
16

Helical Nails for Flat Roofs
Super-8 Headed Helical Nails
Headed helical nails are designed to
secure plywood/insulation composite
roof decks to timber joists. They are
manufactured from zinc coated steel in
two standard lengths which suit panel
depths from 70mm to 126mm. Other
lengths are available on request.
Super-8s should be installed at a rate of
8.6 per square metre, using a hammer.
The 20mm diameter head simplifies
installation.
17

Nail Lengths
Standard Lengths (mm)
135, 165
Note: Other lengths are available on request
Pack Sizes
Quantity per Bag Quantity per Box
25 500
Recommended Lengths
Composite
Panel Depth
70-96mm
96-126mm
Recommended
Nail Length
135mm
165mm
Super-8 nails should achieve a minimum
embedment of 35mm in the joist.
Recommended Axial Spacings
Joist Centres 400mm 600mm
Axial Spacings 400mm x 400mm 600mm x 300mm
400mm
600mm
400mm
300mm
Test Results
Test data is available on request.
18

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