"05511 - Metal Stairs"
Section Cover Page Section 05511 1999-09-13 Metal Stairs This Master Specification Section contains: .1 This Cover Sheet .2 Specification Section Text: 1. General 1.1 Related Work Specified in Other Sections 1.2 Design 1.3 Reference Standards 1.4 Shop Drawings 2. Products 2.1 Materials 2.2 Fabrication 2.3 Steel Pan Stairs 2.4 Checker Plate Stairs 2.5 Pipe Rail Balustrades 2.6 Balustrades 2.7 Shop Painting 3. Execution 3.1 Installation of Stairs 3.2 Installation of Plastic Handrail BMS Basic Master Specification Alberta Infrastructure Page 0 Master Specification System Data Sheet - Reference Standards Section 05511 1999-09-13 Metal Stairs Applicable Standards: .1 CAN/CGSB-1.40-M89 Primer, Structural Steel, Oil Alkyd Type .2 CAN/CSA-G40.21-M92 Structural Quality Steels .3 CAN/CSA-S16.1-94 Limit States Design of Steel Structures .4 CSA W59-M1989 Welded Steel Construction (Metal Arc Welding) These reference documents may be available for reference purposes in the Technical Resources and Standards Division Library, Alberta Infrastructure, 3rd Floor, 6950 - 113 Street, Edmonton; Telephone: (780) 427-7924. BMS Basic Master Specification Alberta Infrastructure Page 01 Master Specification System Section 05511 Plan No: Metal Stairs Project ID: Page 1 1. General 1.1 RELATED WORK SPECIFIED IN OTHER SECTIONS .1 Setting anchor bolts in concrete forms: Section 03300. .2 Concrete fill in landing and stair pans: Section 03300. .3 Wood handrails: Section 06200. .4 Finish painting: Section 09901. 1.2 DESIGN .1 All stairs and landing sections, attachments and connections, except where members are specifically sized on the drawings shall be designed to support a minimum live load of [ kN/m2]. .2 The design, detailing and fabrication shall be in accordance with CAN/CSA-S16.1-94. 1.3 REFERENCE STANDARDS .1 Do welding work to CSA W59-1989. .2 Provide and make available on site a copy of above referenced standard. 1.4 SHOP DRAWINGS .1 Submit shop drawings in accordance with Division 1. .2 Clearly indicate construction details, sizes of steel sections, thickness or gauge of steel sheet, profiles, attachments, dimensions and field joints. 2. Products 2.1 MATERIALS .1 Steel sections and plates: to CAN/CSA-G40.21-M92 Type [38W] [ ]. SPEC NOTE: Type 38W is weldable structural grade steel having a yield strength of 262 MPa. Refer to CAN/CSA-G40.21-M92 for other grades and yield strengths available. .2 Welding materials: to CSA W59-1989. .3 Shop Coat Primer: to CAN/CGSB-1.40-M89. .4 Plastic handrails: extruded semirigid polyvinylchloride, flat profile to fit tightly on [ mm x mm] steel bar, colour will be [ ] [selected by Minister]. Provide with end pieces [and preformed corners]. Section 05511 Plan No: Metal Stairs Project ID: Page 2 2.2 FABRICATION .1 Weld or bolt all connections. .2 Accurately form connections with exposed faces flush, mitres and joints tight. .3 Grind or file exposed welds and steel sections smooth. 2.3 STEEL PAN STAIRS .1 Stair shall be [closed] [open] riser steel pan construction. .2 Form treads [and risers] from [ mm] steel plate. steel plate. Secure treads [and risers] to [ ] angle chairs [vertically] and horizontally, which in turn are welded to stringers. .3 Wall stringers shall be [ x x kg/m] channels. .4 Outer stringers shall be [ x x kg/m] channels with [ mm] thick plate fascia welded on. .5 Landings shall be formed from [ mm] thick steel plate. .6 Provide clip angles for fastening of furring channels, where an applied finish is indicated for soffits. 2.4 CHECKER PLATE STAIRS .1 Form treads from [ mm] thick steel checker plate to the profile shown, and secure to stringers with [ x x kg/m] angle. .2 Stringers shall be [ x x kg/m] channels. .3 Landings shall be formed from [ mm] thick steel checker plate. .4 Provide clip angles for fastening of furring channels, where applied finish is indicated for soffits. 2.5 PIPE RAIL BALUSTRADES .1 Balusters and handrails shall be [ mm] internal diameter steel pipe. .2 Wall handrails and brackets shall be as detailed. .3 Cap and weld exposed ends of balusters and handrails. Fill and grind smooth. Section 05511 Plan No: Metal Stairs Project ID: Page 3 2.6 BALUSTRADES .1 Construct balustrades from [ x mm] bar balusters, [ x mm] top rail, [ x mm] bottom rail. .2 Fabricate wood balustrade supports from [ x mm] steel tubing with both ends capped and welded. .3 Weld balustrades to stringers as indicated. .4 Wall brackets and handrails shall be as indicated. 2.7 SHOP PAINTING .1 Use primer as prepared by manufacturer without thinning or adding admixtures. Paint on dry surfaces, free from rust, scale, grease, do not paint when temperature is below 7°C. .2 Surfaces to be embedded in concrete shall not be painted. .3 Apply two coats of primer to parts inaccessible after final assembly. Apply one coat of primer to exposed stair surfaces. 3. Execution 3.1 INSTALLATION OF STAIRS .1 Install staircases plumb and true in exact locations, using welded connections wherever possible to provide a rigid structure. .2 Provide all necessary anchors, bolts and plates as required for connecting stairs to the structure. .3 Touchup and make good any damage to priming coat. .4 Ensure alignment with adjacent construction. Coordinate with related work to ensure no interruption in installation. 3.2 INSTALLATION OF PLASTIC HANDRAIL .1 Install plastic handrails in accordance with manufacturers instructions, using tools for softening and jointing handrails. Section 05511 Plan No: Metal Stairs Project ID: Page 4 .2 Form neat, tight and invisible joints and seams. Remove surplus material from joint with sharp knife. Provide solid return at exposed ends of handrail. .3 Clean and wax plastic surfaces. END OF SECTION