MEP-Technical Manual CDN 0408.qxd - Hambro

DESIGN PRINCIPLES AND CALCULATIONS
TABLE 6: Concentrated Loads with 1 251 mm (4’-1 1/4”) Joist Spacing
f’ c = 20 MPa (3 000 psi), F y = 400 MPa (60 000 psi) for Wire Mesh
CONCENTRATED SLAB MESH SIZE SPECIAL REMARKS
LOAD THICKNESS 152 x 152 (6 x 6) (See fig. 1)
MW18.7 x MW18.7 Extra layer @ � and �
70 mm (2 3/4”)
OFFICE BUILDING
to
90 mm (3
(6/6)
MW18.7 x MW18.7 Single layer throughout No
1/2”)
(6/6)
MW25.7 x MW25.7
but S1 ≤ 1 050 mm
Single layer throughout
“chairs” on
Top chord
9 kN on (4/4)
750 mm x 750 mm
100 mm (4”)
to
125 mm (5”)
MW25.7 x MW25.7
(4/4)
MW13.3 x MW13.3 (8/8)
or MW18.7 x MW18.7 (6/6)
Single layer throughout
Double layers throughout
MW18.7 x MW18.7
(6/6)
Double layers throughout
PASSENGER CAR * MW25.7 x MW25.7 Extra layer @ � No
90 mm (3
(4/4) “chairs” on
1/2”)
11 kN on
750 mm x 750 mm
to
115 mm (4
MW25.7 x MW25.7
(4/4)
Single layer throughout
but S1 ≤ 1 050 mm
Top chord
1/2”)
MW13.3 x MW13.3 Double layers throughout
plus 50 mm asphalt (8/8) + Extra layer @ �
MW13.3 x MW13.3
(8/8)
Double layers throughout
but S1 ≤ 1 050 mm
MW18.7 x MW18.7 Double layers throughout No
PASSENGER CAR *
90 mm (3 1/2”)
18 kN on
750 mm x 750 mm
to
115 mm (4
(6/6)
MW25.7 x MW25.7 Extra layer @ � and �
“chairs” on
Top chord
1/2”)
plus 50 mm asphalt
(4/4)
MW25.7 x MW25.7
(4/4)
Single layer throughout
but S1 ≤ 1 050 mm
* See CAN3-S413-94 for Parking Structures Design for more information.
TABLE 7: Concentrated Loads with 1 555 mm (5’-1 1/4”) Joist Spacing
f’ c = 20 MPa (3 000 psi), F y = 400 MPa (60 000 psi) for Wire Mesh
CONCENTRATED SLAB MESH SIZE SPECIAL REMARKS
LOAD THICKNESS 152 x 152 (6 x 6) (See fig. 4)
OFFICE BUILDING
9 kN on
70 mm (2
MW25.7 x MW25.7 Extra layer @ �
3/
750 mm x 750 mm
4”)
to
100 mm (4”)
(4/4)
MW18.7 x MW18.7
(6/6)
Double layers throughout
PASSENGER CAR *
90 mm (3 1/
11 kN on
750 mm x 750 mm
2”)
to
115 mm (4
MW18.7 x MW18.7
(6/6)
Double layers throughout
but S1 ≤ 1 050 mm
1/
plus 50 mm asphalt 2”)
MW25.7 x MW25.7
(4/4)
Single layer throughout
+ Extra layer @ � and �
PASSENGER CAR *
90 mm (3 1/
MW18.7 x MW18.7 Double layers throughout
2”)
18 kN on
to
(6/6) + Extra layer @ � and �
750 mm x 750 mm
115 mm (4 1/
MW25.7 x MW25.7 Double layers throughout
plus 50 mm asphalt 2”)
(4/4)
* See CAN3-S413-94 for Parking Structures Design for more information.
NOTE: For other configurations, please contact your Hambro representative.
No
“chairs” on
Top chord
No
“chairs” on
Top chord
No
“chairs” on
Top chord
3