MEP-Technical Manual CDN 0408.qxd - Hambro

9. SPECIFICATIONS
PART 1-GENERAL
1.1 SCOPE
The supplier shall:
(a) Furnish all labor, materials, equipment and services
necessary for, and incidental to, the fabrication of the
Hambro Composite Floor System in accordance with
these specifications and applicable drawings. Hambro
Steel joists and Rollbar shall be manufactured and
marketed by Hambro or their authorized representatives.
(b) Fully coordinate the Hambro Composite Floor
System with the other structural, mechanical, electrical
and architectural components of the buildings.
PART 2 - TYPICAL SPECIFICATION
2.1 CODES
All fabrication shall be in strict accordance with the Hambro
Shop Standard Practice, using steel conforming to Canadian
Standards Association CAN/CSA G40.21-04 or similar ASTM
Standards, or their engineering equivalent capacities.
2.2 DESIGN
Flexural design shall be by the Limit States Design
method and as described in the Hambro literature. The
slab shall be designed in accordance with CAN/CSA A23.3-
04 “Design of Concrete Structures for Buildings”, the
top chord shall be designed in accordance with
CAN3-S136-M94 “Cold-Formed Steel Structural Members”,
the bottom chord and webs shall be designed in
accordance with CAN/CSA S16.01 - “Steel Structures for
Buildings (Limit States Design)”.
2.3 QUALIFICATIONS
(a) All welding materials and methods used for fabrication
shall be in accordance with the requirements of
the Canadian Welding Bureau.
(b) All field welders shall be certified, qualified operators
in accordance with the requirements of CWB for the
materials and methods being used, except that
Hambro joist repairs or modifications that may be
required may be done by factory approved personnel.
2.4 DRAWINGS
(a) Submit detailed erection drawings to the Architect,
Engineer or the General Contractor for approval
showing material lists, mark numbers, types, locations,
and spacing of all joists and accessories. Show
method of attachment of the joist to supporting
members. Contract drawing notes relative to the
Hambro system shall be considered a part of this
specification as though fully set forth herein.
SPECIFICATIONS
(b) Shop drawings prepared only from approved erection
drawings shall be used for fabrication and erection.
(c) Figured dimensions only shall be used, scaling
drawings shall not be permitted.
2.5 HANDLING AND STORAGE
Care shall be exercised at all times to avoid damage to
Hambro joists through careless handling during unloading,
storing and erecting.
PART 3 - PRODUCTS
3.1 MATERIALS
(a) Hambro joists:
1- All composite joists shall be fabricated in accordance
with Section 2.1 and 2.2 of these Specifications.
2- Top chord member shall act as a continuous shear
connector of cold rolled steel, minimum 13 gauge
with Fy = 350 MPa (50 ksi) minimum.
3- Bottom chord member shall consist of either hot
rolled angles with Fy = 380 MPa (55 ksi) minimum
or cold rolled angles of equal capacities of steel.
4- Web members shall consist of minimum 13 mm ( 1 /2”)
diameter hot rolled bars of Fy = 350 MPa (50 ksi)
minimum.
5- All composite joists shall be shop painted with a
rust inhibitive primer. According to CISC/CPMA
Standard 1-73a one coat paint.
(b) Rollbar shall be designed specifically to support
10 mm ( 3 /8”) to 15 mm ( 5 /8”) plywood forms, a 2 kPa
(40 psf) construction load and slab weight until the
slab has cured sufficiently (concrete cylinder strength
of 3.5 MPa (500 psi)), and act as temporary bridging
and spacers for Hambro composite joists.
(c) Standard bearing shoes shall be angle shape
100 x 50 x 6 x 120 (4” x 2” x 1 /4” x 4 3 /4”) wide, unless
otherwise noted.
(d) Slab reinforcement shall be minimum
152 x 152 MW13.3 x MW13.3 ( 6 x 6 - 8/8) welded
wire fabric, with Fy = 400 MPa (60 ksi) minimum
unless otherwise required by structural engineer.
(e) Forms shall be 1 220 mm (4’-0”) or 1 500 mm (4’-11”)
plywood sheets, and may be 10 mm ( 3 /8”) to 15 mm ( 5 /8”)
thick.
(f) Concrete
1- Minimum ultimate compressive strength f’ c = 20 MPa
(3 000 psi) at 28 days for Hambro design.
2- Standard density i.e. 2 450 kg/m3 (145 pounds / ft. 3 ).
3- Maximum size coarse aggregate: 19 mm ( 3 /4”).
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