Do not place bundles of deck so as to overload the supporting structure.

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1 1/5 1.0 PURPOSE This specification describes the minimum requirements for the design, supply, fabrication and installation of steel roof decking complete with all accessories conforming to the roof system as shown on the project drawings. This specification supplements the requirements of the Building Code and Regulations..0 SUBMITTALS Submit shop drawings for review prior to fabrication. Show on shop drawings the position, extent, type and arrangement of the units, their relationship to other materials, depth, core thickness, zinc-coating designations, connections and accessories. Make allowances for clearances and provide details of reinforcing around openings where these are not specifically detailed on the drawings..1 STORAGE AND HANDLING Do not place bundles of deck so as to overload the supporting structure. Secure steel deck units in place prior to leaving the job site at the end of a working day. Protect the galvanizing coat from damage and scratches at all times. 3.0 QUALITY ASSURANCE 3.1 REQUIREMENTS OF REGULATORY AGENCIES Conform to the requirements of CAN/CSA S136 in design, fabrication and erection of materials, and Canadian Sheet Steel Building Institute standards (CSSBI), specification, codes and bulletins. 3. QUALIFICATIONS OF WELDING In accordance with CSA W55.3 and CSA W MATERIALS Form steel deck units of zinc-coated sheet steel, conforming to ASTM Standard A653/A653M minimum Grade 30 (with minimum yield strength of 30 Mpa {33KSI}), with a steel core nominal thickness as indicated on the drawings but not less than 0 ga. (0.91 mm). Provide a minimum zinccoating designation of Z75 (G90). The minimum depth of steel deck shall never be less 1.5 (38 mm). Increase the steel core nominal thickness and the zinc-coating, where necessary, in order to satisfy structural exposure, specified fire resistance rating, or other requirements called for on the project drawings.

2 /5 Supply cover plates, cell closures and flashings of similar material and zinc-coating designation to that specified for the steel deck. Use a steel core nominal thickness of 0 ga (0.91 mm) or greater. Acceptable manufacturers of metal decking are member companies of the Canadian Sheet Steel Building Institute. Example of acceptable suppliers: Vic West Steel Inc. Canadian Metal Rolling Mills Ltd. James River Steel 5.0 DESIGN CRITERIA Design roof deck system in accordance with the Building Code (OBC) and with the Supplement to OBC design data to support snow loads, positive and negative wind loads, earthquake loads, roof equipment unit loads, and any other roof dead or live loads as applicable, and: o Ensure that the deflection of the roof does not exceed 1/40 th of span. o Maximum deck span not to exceed 5-6 o Do not rely on the roof deck to act as lateral diaphragm for structure lateral stability. Design independent system to maintain the structure lateral stability. 6.0 FABRICATION Fabricate steel deck units in accordance with the applicable requirements of CAN/CSA S136 and CSSBI-10M. Wherever structural framing permits, and subject to reasonable limitations for handling, design and fabricate steel deck units to span continuously over at least three spans. Ensure steel deck units have interlocking male and female side laps. Upon completion of fabrication, ensure that the depth of steel deck is not more than 1/3 inch under the design depth and the cover width of steel deck does not exceed the design width by more than 1/8 inch per foot of width. 7.0 ERECTION Install steel roof deck in accordance with CAN/CSA A136 and CSSBI-10M. Ensure all erection work is carried out in accordance with the Fabricator's printed instructions unless superseded or modified by the requirements of this specification. Install deck free of dirt, scale, oil, or foreign matter. Ensure welders are qualified by the Canadian Welding Bureau for fusion deck welding (W47.1).

3 3/5 Place and align units in their final position on the supporting structure prior to making permanent connections. Minimum bearing on the structural steel support shall be equal to the depth of the deck, but not less than. Damaged, bent or dished units will be rejected. Arrange steel deck units on the supporting structure according to the pattern indicated on the drawings. Provide end laps of not less than 3 inches and formed over supports. Align units in straight runs providing close registration of the cells of abutting units. Provide temporary connection of the units to the supporting structure to prevent displacement of the units due to construction operations and wind forces which may result in a hazardous condition. Steel roof units shall be adequately fastened to structural supports. Provide permanent connection of the units to the supporting structure using mechanical fasteners or with 3/4 inch diameter welds at maximum 16 inches on centre, or flute spacings, whichever is less, for each unit unless otherwise shown on the project drawings. Ensure the welding consumables are suitable for the grade of deck steel. Arc spot welds are not to be used when ambient temperature is less than 5 deg C. Arc spot welds are not to be used when connecting to dynamically/cyclically loaded structural members. Proper ventilation precautions for welding fumes must be considered when welding galvanized deck. Mechanical fasteners should consist of self-tapping screws approved for sheet metal deck application, with nylon coated head and rubber washer, at maximum spacing not to exceed 16 or flute spacings, whichever is less, in any direction. Acceptable products: Powder Actuated DX fasteners type X-AL-H by Hilti or approved equal. Mechanically fasten side laps of adjacent units at intervals not exceeding 4 inches on centre or, alternatively, for thicknesses greater than inch, weld side laps using one inch long welds at intervals not exceeding 4 inches on centre. Install all flashings, cell closures, cover plates and other related items as specified and/or indicated on the drawings.

4 4/5 Where steel decking is welded in place, inspect the deck surface and cover all areas where the zinccoating has been burned by welding with a suitable primer, applied according to the paint manufacturer's instructions. Cutting and reinforcing of openings in the steel roof deck shall be done at the time of installation of the deck. Openings shall be marked on the steel roof deck by the General Contractor. No reinforcement is required for roof deck openings smaller than 6. Reinforce deck openings with any one dimension between 6 and 18, as indicated or as per CSSBI Standard for Steel Roof Decks. Openings in excess of 18 and areas of concentrated load, shall be framed structurally as indicated on the project drawings. 8.0 REFERENCE DOCUMENTATION The following documents are related to this specification and shall be used to their latest revision: Standards of American Society for Testing and Materials (ASTM) ASTM A653/A653M Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process Standards of Canadian Sheet Steel Building Institute (CSSBI) CSSBI 10M-08 Steel roof deck CSSBI SSF-6 Metallic coated sheet steel for structural building products. Standards of Canadian Standards Association (CSA) CAN/CSA S North American Specifications for the Design of Cold Formed Steel Structural Members CAN/CSA-S136S1-04 Supplement to CSA S136 CSA W55.3 Certification of companies for resistance welding of steel and aluminum CSA W59-03 Welded Steel Construction (Metal-Arc Welding) CSA W47.1 Certification of Companies for Fusion Welding of Steel CSA G164 Hot Dip Galvanizing of Irregularly Shaped Articles

5 5/5 9.0 REVISION AND TRANSITION NOTES Revision notes describe: what was changed, and if applicable, why it was changed, and the plan to implement the change, including whether changes are retroactive. Note: The revision notes are a summary of the changes and may not necessarily be a complete list. A risk code is entered for each revision and if applicable, the revision notes will describe how risk was addressed for the revision. Risk Code A Risk Category This revision is a minor change and/or introduces no risk. B C Risk has been addressed for this revision by the reviewer and approver. Low risk or no new hazards identified. For this revision, a PHR or other risk management tool has been used to address risk and minimize hazards. This risk assessment has been documented and is available through Central Engineering. Rev 1 Revision Notes Document format and number changed due to Vale Engineering Document Program changes in 011/01. Previous Standard number was Rev 4 Document reviewed Format updated Minor clarifications added Risk Code Approved by Reviewed by Issue Date YYYY/MM/DD --- AA AA 01/11/30 A A.Alaeddine A.Rafi