MasterFormat: 95

Download this Prefabricated Steel Stair Systems Specification for   WORD | WP | RTF | TEXT

Find over 500 more construction specifications | Arcat.com

	SECTION 05512
	PREFABRICATED STEEL STAIR SYSTEMS
	Copyright 2004 - 2010 ARCAT, Inc. - All rights reserved
	** NOTE TO SPECIFIER ** Sharon Stairs; prefabricated steel stair systems. . This section is based on the products of Sharon Stairs, which is located at: 1481 Exeter Rd. Akron, OH 44306 Toll Free Tel: 800-792-0129 Tel: 330-777-5377 Email: request info Web: www.sharonstair.com [ Click Here ] for additional information. . The Sharon Stairs and its divisions specialize in architectural metal products precisely designed, engineered, and manufactured to meet your building needs for steel stair and rail systems. The Sharon drop-in stair system has been specified and installed by architects and contractors for over three decades in projects nationwide. . Drop-in stair systems offer exceptional value, at approximately 30 percent less cost compared to plan and spec stairs. Drop-in stairs are technically advanced products made to handle required code and ADA accessibility requirements. Drop-in stairs install quickly and accurately and offer a wide range of construction and component options.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete paragraphs below which are not applicable.
		A.	Provide standard prefabricated stair and rail systems.
		B.	Provide custom prefabricated stair and rail systems.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 03300 - Cast-In-Place Concrete; field-poured treads and landings.
		B.	Section 04800 - Masonry Assemblies; landing channel supports.
		C.	Section 05120 - Structural Steel; landing channel supports.
		D.	Section 05500 - Metal Fabrications: Building support structure and miscellaneous framing fabrications.
		E.	Section 09260 - Gypsum Board Assemblies; continuous sheet steel backing for wall-supported handrails.
		F.	Section 09900 - Paints and Coatings; field-applied finishes.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ASTM A36 - Standard Specification for Carbon Structural Steel.
		B.	ASTM A53 - Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.
		C.	ASTM A500 - Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes.
		D.	ASTM A513 - Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing.
		E.	ASTM A786 Standard Specification for Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor Plates.
		F.	ASTM A1008 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable.
		G.	ASTM A1011 Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength.
		H.	AWS D1.1 - Structural Welding Code - Steel.
		I.	AWS D1.3 - Structural Welding Code - Sheet Steel.
		J.	ADAAG - Americans with Disabilities Act.
		K.	ANSI A117.1 Accessible and Usable Buildings and Facilities Standards.
		L.	Steel Structures Painting Council. (SSPC) SP3 - Power Tool Cleaning.
		M.	New York City Building Code Reference Standard: RS 6-1 Photoluminescent Exit Path Markings.
		N.	New York City Building Code Reference Standard: RS 6-1A Additional Standards as Required by Reference Standard RS 6-1 for Photoluminescent Exit Path Markings.
	1.4	PERFORMANCE REQUIREMENTS
	** NOTE TO SPECIFIER ** Criteria below is suitable for most states, but must be confirmed for the jurisdiction of the project. If criteria is not known, delete the three paragraphs below and rely on Par. 1.6 B to establish performance requirements.
		A.	Comply with applicable code requirements and the following criteria. In case of conflict, the more stringent requirements shall govern.
		B.	Structural Performance of Stairs: Stairs shall withstand the following structural loads without exceeding the allowable design working stress of materials, including anchors and connections. Apply each load to produce the maximum stress in each component:
			1.	Treads and Platforms of Metal Stairs: Capable of withstanding a uniform load of 100 lb/sf (4.79 kN/sq.m) and concentrated load of 300 lbf (1.33 kN) applied on an area of 4 square inches. (2580 square mm). Concentrated and uniform loads need not be assumed to act concurrently.
			2.	Stair Framing: Capable of withstanding stresses resulting from loads specified in addition to stresses resulting from railing system loads.
			3.	Limit deflection of treads, platforms and framing members to L/240 or 1/4 inch (6 mm), whichever is less.
		C.	Structural Performance of Handrails and Railings: Handrails and railings shall withstand the following structural loads without exceeding the allowable design working stress of materials, including handrails, railings, anchors and connections.
			1.	Top Rail of Guardrail: Capable of withstanding a concentrated load of 200 lbf (0.89 kN) applied in any direction and a uniform load of 50 lbf/ft. (0.73 kN/m) applied in any direction. Concentrated and uniform loads need not be assumed to act concurrently.
	1.5	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	[ Product Data ]:
			1.	Manufacturer's product information and installation manual.
			2.	Submit complete Installation instruction manual as published by the Pre-engineered stair manufacture to complete this section of work.
		C.	Shop Drawings: Stair plans, elevations, details, methods of installation and anchoring.
			1.	Show members, sizes and thickness, anchorage locations and accessory items.
			2.	Furnish setting diagrams for anchorage installation as required.
			3.	Shop drawings shall include calculations stamped by a structural engineer registered in the jurisdiction in which the project is located.
		D.	USGBC LEED Submittals: Submit recycled content of products provided under this Section.
		E.	Verification Samples for Tread: For each finished tread product specified, two samples, minimum size 6 inches (152 mm) square, representing actual product.
		F.	Source Quality Control: Submit documentation verifying that components and materials specified in this Section are from single manufacturer.
		G.	Qualification Statements:
			1.	Submit certificate verification that manufacturer is American Institute of Steel Construction (AISC) Certified for Standard Steel Building Structures.
			2.	Submit letter of verification for Installer's Qualifications.
	1.6	QUALITY ASSURANCE
		A.	Manufacturer to have an American Institute of Steel Construction (AISC) Certified firm having 10 years experience manufacturing components similar to or exceeding requirements specified in scope of project.
		B.	Manufacturer shall have sufficient capacity to produce and deliver required materials without causing delay in work.
		C.	Regulatory Requirements: Comply with applicable provisions of local building code, ADAAG and ANSI A117.1 as applicable for stairs and handrails.
		D.	Welding: Perform shop and field welding in accordance with applicable recommendations of the American Welding Society. Use only welders who have been certified by AWS D1.1 testing within one year of contract date.
		E.	Tolerances: Coordinate fabrication and installation of stair and railing systems with adjacent building construction and verify critical dimensions to ensure accurate installation.
	1.7	DELIVERY, STORAGE, AND HANDLING
		A.	Packing and Shipping: Deliver stair and rail components in Manufacturer's pre-bundled protective wrapping, clearly labeled for stair type and location in building.
		B.	Storage and Protection: Store stair and rail components above ground, protected from exposure to the elements and from physical damage caused by other construction activities. Rusted, bent, warped or otherwise damaged units will not be accepted.
		C.	Packaging Waste Management:
	Specifier Note: The disposal of packaging waste into landfill sites demonstrates an inefficient use of natural resources and consumes valuable landfill space. Specifying appropriate packaging and construction waste management and disposal procedures may contribute to points required for USGBC's LEED® construction project certification. Specifier Note: Include the following Subparagraphs to specify information that will provide direction to the Contractor for the disposal of construction waste materials using environmentally responsible methodology other than landfill resources.
			1.	Separate waste materials for recycling in accordance with Construction Waste Management and Disposal Plan.
	Specifier Note: USGBC's LEED® certification includes credits for the diversion of construction waste from landfill. Diversion can be tracked by either weight or volume but must be consistent for all materials. Manufacturer may reclaim packaging and delivery materials for recycling.
			2.	Remove packaging materials from site and dispose of at appropriate recycling facilities.
			3.	Collect and separate for disposal paper, plastic, polystyrene, corrugated cardboard packaging material in appropriate onsite bins for recycling.
			4.	Fold metal and plastic banding; flatten and place in designated area for recycling.
	Specifier Note: Add additional Subparagraphs to specify pallets, crates, padding and other packing materials that are typically associated with the specified products.
			5.	Remove pallets from site.
	1.8	DELIVERY, STORAGE, AND HANDLING
		A.	Field Measurements: General Contractor will provide guaranteed field measurements if schedule does not allow for physical dimensioning. Otherwise field verify floor to floor and horizontal dimensions of spaces where stairs will be installed prior to fabrication of stairs under this section.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Sharon Stairs, which is located at: 1481 Exeter Rd. ; Akron, OH 44306; Toll Free Tel: 800-792-0129; Tel: 330-777-5377; Email: request info; Web: www.sharonstair.com
	** NOTE TO SPECIFIER ** Delete the following paragraphs not applicable; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Substitutions: As approved per architect prior to bid date.
		D.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	2.2	MATERIALS
		A.	Steel Shapes and Plates: ASTM A36:
		B.	Steel Pipe: ASTM A53, Type E or S, Grade B.
		C.	Steel Tubing:
			1.	Structural use: ASTM A500, Grade B or C.
			2.	Non-Structural Use: ASTM A513, hot rolled or coiled rolled (mill option).
		D.	Steel Sheet:
			1.	Structural Use: ASTM A1011 (hot rolled).
			2.	Non-Structural Use: ASTM A513, hot rolled or coiled rolled (mill option).
		E.	Fasteners and Accessories: Provide all necessary anchor bolts, clip angles, hanger rods and other hardware, accessories and incidental materials required for complete installation of stairs and rails.
		F.	Welding Materials: Conform to AWS code and AWS filler metal specifications for material being welded.
		G.	Primer: HAPS-free, solvent-based, rust inhibitive primer containing less than 3.5 lb/gal (1.6 kg/L) Volatile Organic Compounds (VOC) and compatible with conventional alkyds topcoats.
		H.	Concrete Materials and Reinforcement: Comply with the applicable requirements of Section 03300.
	2.3	FABRICATION
		A.	General:
			1.	Use same material and finish as parts being joined, except use stainless steel between dissimilar metals and non-corrosive fasteners at exterior connections or joints.
			2.	Provide fasteners of sufficient strength to support connected members and loads, and to develop full strength of parts fastened or connected.
			3.	Construct stairs and rails with all components necessary for support and anchorage, and to provide a complete installation.
	** NOTE TO SPECIFIER ** Shortform option for standard stair and rail system . Delete if custom prefabricated stair and rail system is required.
	2.4	STANDARD PREFABRICATED STAIR AND RAIL SYSTEM
		A.	Manufacturer's standard prefabricated, pre-engineered straight run stair and landing system, consisting of hot rolled steel sheet treads, risers and landings. Stringers to be steel plate or channel with side mounted prefabricated railings.
			1.	Stringers: Minimum thickness or gauge as determined by structural design calculations, structural grade steel plate and or channel.
			2.	Risers: Closed riser, minimum 14-gauge (1.9 mm) hot-rolled mild steel sheet, sloped to a maximum 1-1/2 inches (38 mm) and conforming to ADAAG nosing requirements.
			3.	Treads: Manufacturer's standard concrete pan system (field poured). Tread pans shall be a minimum of 14 gauge (1.7 mm), or as determined by design calculations. Pan depth 1-1/2 inches (38 mm). Exposed welds from the bottom side of flight assemblies are not acceptable. All welds shall be from topside of tread pans as recommended by manufacture. Refer to section 03300 for concrete design requirements and field finish of treads.
			4.	Mid Landings: Minimum of 12 gauge (2.7 mm) hot-rolled mild steel sheets, formed for a minimum 2-1/2 inches (64 m) concrete fill, with 11 gauge channel supports and bracing welded to perimeter frame at 12 inches (305 mm) o.c.
			5.	Fasteners and Supports: Sized by the Manufacturer to meet the structural design criteria. If hanger rod connections are applicable to any of the landing connections, they shall be a minimum of 5/8 inch (16 mm) diameter steel rod, actual size based on stair load.
	** NOTE TO SPECIFIER ** Delete if not required.
			6.	Nosing Insert: Manufacturer's factory filled pan with integral self-illuminating nosing meeting NYC Reference Standards RS 6-1 and RS-1A. Provide Tread Glow by Sharon Stairs.
		B.	Manufacturer's standard welded steel tube railing system complying with the following requirements:
			1.	Rails: 1-1/2 inches (38 mm) diameter by minimum 13 gauge (2.3 mm) round steel tube, continuous multi strand type, equally spaced not more than 3-15/16 inches (100 mm) clear between strands, and with a minimum extension per code at top and bottom risers. Wrap rail continuously past space between flights to form guardrail as required by building code. Terminate rail ends with radiused returns, newel posts, or safety terminations approved by local code. Provide not less than 1-1/2 inches (38 mm) clear between rail and wall.
			2.	Rail Posts: 1-1/2 inches (38 mm) square by 11 gauge (3 mm) tubing. Rail posts to fasten to side of plate stringers per manufactures shop drawings. Manufacture to pre-weld erection aid to rail post for proper height to aid stair erector. Erection aid (Setting block) to be removed and weld ground smooth after installation.
			3.	Fabrication:
				a.	Use preformed or prefabricated bends.
				b.	Butt weld tee and cross intersections in tubing: cope and weld intersections in pipe. Miter elbows.
				c.	Mechanically fasten internal sleeves and fittings.
				d.	Provide minimum 12 gage (2.7 mm) welded steel plate closures or hemispherical closure fittings on all exposed rail ends.
		C.	Accessories: Provide anchor bolts, clip angles, hanger rods, hardware and incidental materials required for complete installation, as recommended by the manufacturer.
	** NOTE TO SPECIFIER ** Delete if custom prefabricated stair and rail system not required.
	2.5	CUSTOM PREFABRICATED STAIR AND RAIL SYSTEM
		A.	Support System: Comply with details indicated on the Drawings. Provide manufacturer's standard support system with the following type of landing support.
	** NOTE TO SPECIFIER ** Delete types below not required for the project. Refer to the manufacturer's catalog or website for illustrations and details.
			1.	Hanger rod landing supports.
			2.	Strut tube landing supports.
			3.	Shelf angle landing supports.
			4.	Knock-down (KD) landing supports.
		B.	Rail System: Comply with details indicated on the Drawings. Provide manufacturer's standard rail system of the following type.
	** NOTE TO SPECIFIER ** Delete handrail and railing types below which are not required for the project. Refer to the manufacturer's catalog or website for illustrations and details.
			1.	Standard 34 inch (864 mm) height handrail system with 42 inch (1067 mm) guardrails at landings and openings.
				a.	Rail Type: Full mesh panel rail.
				b.	Rail Type: Picket style rail.
				c.	Rail Type: 5-Line sweep rail.
				d.	Rail Type: Perforated panel rail.
			2.	Standard 36 inch (914 mm) height handrail system with 42 inch (1067 mm) guardrails at landings and openings.
				a.	Rail Type: Full mesh panel rail.
				b.	Rail Type: Picket style rail.
				c.	Rail Type: 6-Line sweep rail.
				d.	Rail Type: Perforated panel rail.
			3.	Standard 42 inch (1067 mm) height guard rail system with 34 inch (864 mm) ADA Grab and with 42 inch (1067 mm) guardrails at landings and openings.
				a.	Rail Type: Full mesh panel guard rail with hand rail.
				b.	Rail Type: Picket style guard rail with handrail.
				c.	Rail Type: 7-Line sweep guard rail with handrail.
				d.	Rail Type: Perforated panel guard rail with handrail.
		C.	Wall Handrails: Match stair handrails. Provide manufacturer's standard pressed steel wall brackets with anchors suitable for supporting construction.
		D.	Tread Construction: Comply with details indicated on the Drawings and the following. Provide manufacturer's standard tread of the following type.
	** NOTE TO SPECIFIER ** Delete types below not required for the project. Refer to the manufacturer's catalog or website for illustrations and details.
			1.	Tuff-Tread: Factory-applied abrasive filled epoxy, 3/8 inch (10 mm) thick, 8,000 psi (55,120 kPa) compressive strength.
			2.	Tuff-Coat: Factory-applied lip and wear-resistant abrasive epoxy coating applied directly to flat steel treads.
			3.	Checkered Floor Plate Treads: Slip-resistant checkered floor plate treads.
			4.	Drop-In Precast Treads: 1-1/2 inch (38 mm) thick, 5,000 psi (34,474 kPa) compressive strength. Natural concrete color with broom finish.
			5.	Field-Poured Concrete Treads: 1-1/2 inch (38 mm) pan type treads for field-poured concrete.
	** NOTE TO SPECIFIER ** Delete if not required.
			6.	Nosing Insert: Manufacturer's factory filled pan with integral self-illuminating nosing meeting NYC Reference Standards RS 6-1 and RS-1A. Provide Tread Glow by Sharon Stairs.
	** NOTE TO SPECIFIER ** Barrier gates are typically used where egress stairs extend to basement levels to ensure occupants leaving the building will not descend below the primary level intended for egress from the building.
		E.	Barrier Gates: Manufacturer's standard swing gate assembly with steel spring hinges and rubber bumper between barrier/gate assembly and rail post.
		F.	Accessories: Provide anchor bolts, clip angles, hanger rods, hardware and incidental materials required for complete installation, as recommended by the manufacturer.
	2.6	SHOP CLEANING AND FINISHING
		A.	Rails and Stair Components: Completely remove oil, grease, dirt, mill scale, rust, corrosion products, oxides, paint or other foreign matter from surface of steel in accordance with SSPC-SP3, "Power Tool Cleaning."
		B.	Apply shop primer immediately after fabrication and cleaning, spray apply primer to dry film thickness recommended by primer manufacturer, but not less than 2.0 mil thickness. Apply one coat High Solids Red Oxide Anticorrosive primer meeting SSPC-15 Paint.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates and adjacent construction have been properly constructed. Verify structural framing, enclosures, weld plates, blocking, and size and location of pockets.
		B.	If unsatisfactory conditions are encountered, notify Architect in writing. Do not proceed until unsatisfactory conditions have been corrected.
		C.	Notify Manufacturer of any detail, design or tolerance deviations as noted or drawn on stair shop drawing.
	3.2	INSTALLATION
		A.	Install stairs, landings and handrails in accordance with manufacturer's instructions. Install square, plumb, straight, and true to line and level, with neatly fitted joints and intersections.
			1.	Welds in area of travel shall be ground smooth.
			2.	Do not cut or alter structural components without written authorization.
			3.	Field welding and joining shall conform to AWS D1.1 and AWS D1.3 requirements.
			4.	Installation shall be secure and rigid.
			5.	Landing and flights properly spaced and within Manufacturer's tolerance. Set railing level and uniformly spaced.
			6.	Attach rail post to stringers and install wall railing per approved shop drawings.
			7.	Grind all exposed welds smooth and touch up shop-primed areas with same primer as used by Manufacturer.
	3.3	ADJUSTING AND CLEANING
		A.	Touch-up field welds and abraded areas by application of same coating used for shop primer.
		B.	Repair or replace damaged components.
		C.	After stairs are completely installed, remove all construction debris and rubbish from area. Clean surface of exposed rail and stairs. Leave stair system ready for finish painting.
	Specifier Note: Specify special measures needed to minimize waste, collect recyclable waste and dispose of or recycle field-generated construction waste created during demolition, construction or final cleaning.
		D.	Waste Management:
			1.	Coordinate recycling of waste materials with Division 1 section - Construction Waste Management.
			2.	Collect recyclable waste and dispose of or recycle field generated construction waste created during demolition, construction or final cleaning.
			3.	Remove recycling containers and bins from site.
	END OF SECTION