FA3047-10-R-0012 Atch 2V-Division 5

802 CONS/LGCA-3 FA3047-10-R-0012

Lackland AFB TX Roofing IDIQ

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Section J – Attachment 2V Page 1 of 11 8 Feb 2010

SECTION 05 52 05

METAL RAILINGS AND STAIRS

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced.

The publications are referred to within the text by the basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION

OFFICIALS (AASHTO)

AASHTO M 314(1990; R 2004) Standard Specification for Steel Anchor Bolts

AMERICAN IRON AND STEEL INSTITUTE (AISI)

AISC/AISI 121(2004) Standard Definitions for Use in the Design of Steel Structures

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 350(2005) Load and Resistance Factor Design (LRFD) Specification for Structural

Steel Buildings

AISC 360(2005) Specification for Structural Steel Buildings, with Commentary

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI B18.22.1(1965; R 2003) Plain Washers

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1(2008; Errata 2009) Structural Welding Code - Steel

ASME INTERNATIONAL (ASME)

ASME B18.2.1(1996; Addenda A 1999; Errata 2003; R 2005) Square and Hex Bolts and

Screws (Inch Series)

ASME B18.6.1(1981; R 2008) Wood Screws (Inch Series)

ASME B18.6.3(2003; R 2008) Machine Screws and Machine Screw Nuts

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ASTM INTERNATIONAL (ASTM)

ASTM A 123(2009) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on

Iron and Steel Products

ASTM A 153(2009) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel

Hardware

ASTM A 27(2008) Standard Specification for Steel Castings, Carbon, for General

Application

ASTM A 283(2003; R 2007) Standard Specification for Low and Intermediate Tensile

Strength Carbon Steel Plates

ASTM A 307(2007b) Standard Specification for Carbon Steel Bolts and Studs, 60 000

PSI Tensile Strength

ASTM A 325(2009) Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength

ASTM A 36(2008) Standard Specification for Carbon Structural Steel

ASTM A 449(2007b) Specification for Hex Cap Screws, Bolts, and Studs, Steel, Heat

Treated, 120/105/90 ksi Minimum Tensile Strength, General Use

ASTM A 47(1999; R 2004) Standard Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process

ASTM A 500(2007) Standard Specification for Cold-Formed Welded and Seamless

Carbon Steel Structural Tubing in Rounds and Shapes

ASTM A 53(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-

Coated, Welded and Seamless

ASTM B 26(2009) Standard Specification for Aluminum-Alloy Sand Castings

ASTM B 429(2006) Standard Specification for Aluminum-Alloy Extruded Structural

Pipe and Tube

ASTM C 514(2004) Standard Specification for Nails for the Application of Gypsum

Board

ASTM C 636(2008) Standard Practice for Installation of Metal Ceiling Suspension

Systems for Acoustical Tile and Lay-In Panels

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ASTM E 488(1996; R 2003) Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements

NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS

(NAAMM)

NAAMM AMP 521(2001) Pipe Railing Manual

NAAMM MBG 531(2000) Metal Bar Grating Manual

THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC Paint 25(1997; E 2004) Paint Specification No. 25Zinc Oxide, Alkyd, Linseed Oil

Primer for Use Over Hand Cleaned Steel Type I and Type II

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Submit fabrication drawings for the following items in accordance with the paragraph entitled, "General Requirements," of this section.

Steel Railings and Handrails; G

Aluminum Railings and Handrails; G

Steel Stair System; G

SD-03 Product Data

Submit manufacturer's catalog data including two copies of manufacturers specifications, load tables, dimension diagrams, and anchor details for the following items:

Structural Steel Plates, Shapes, and Bars

Concrete Inserts; G

Masonry Anchorage Devices; G

Protective Coatings; G

Section J – Attachment 2V Page 4 of 11 8 Feb 2010

Steel Stair System; G

SD-07 Certificates

Submit Welding Procedures in accordance with AWS D1.1.

Submit certificates for Welder Qualification in accordance with the paragraph entitled, "Qualifications for Welding Work," of this section.

SD-08 Manufacturer's Instructions

Submit manufacturer's installation instructions for the following products to be used in the fabrication of steel stair work.

1.3 QUALIFICATIONS FOR WELDING WORK

Provide Welding Procedures testing in accordance with AWS D1.1 made in the presence of the Contracting Officer and by an approved testing laboratory at the Contractor's expense.

Provide certified Welder Qualification by tests in accordance with AWS D1.1, or under an equivalent approved qualification test. In addition be performed on test pieces in positions and with clearances equivalent to those actually encountered. If a test weld fails to meet requirements, make an immediate retest of two test welds and each test weld must pass. Failure in the immediate retest will require that the welder be retested after further practice or training and make a complete set of test welds.

PART 2 PRODUCTS

2.1 GENERAL REQUIREMENTS

Preassemble items in the shop to the greatest extent possible. Disassemble units only to the extent necessary for shipping and handling. Clearly mark units for reassembly and coordinated installation.

For the fabrication of work exposed to view, use only materials that are smooth and free of surface blemishes, including pitting, seam marks, roller marks, rolled trade names, and roughness. Remove blemishes by grinding, or by welding and grinding, prior to cleaning, treating, and application of surface finishes, including zinc coatings.

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2.2 STRUCTURAL STEEL PLATES, SHAPES AND BARS

Structural-size shapes and plates, except plates to be bent or cold-formed, must conform to ASTM A 36, unless otherwise noted.

Steel plates to be bent or cold-formed must conform to ASTM A 283, Grade C.

Steel bars and bar-size shapes must conform to ASTM A 36, unless otherwise noted.

2.3 STEEL PIPE

Pipe must conform to ASTM A 53, type as selected, Grade B; primed finish, unless galvanizing is required; standard weight (Schedule 40).

2.4 CONCRETE INSERTS

Provide concrete inserts as follows:

Provide threaded-type concrete inserts consisting of galvanized ferrous castings, internally threaded to receive 3/4-inch diameter machine bolts; either malleable iron conforming to ASTM A 47 or cast steel conforming to ASTM A 27, hot-dip galvanized in accordance with ASTM A 153.

Provide wedge-type concrete inserts consisting of galvanized box-type ferrous castings designed to accept 3/4-inch diameter bolts having special wedge-shaped heads; they shall be either malleable iron conforming to ASTM A 47 or cast steel conforming to ASTM A

27 and hot-dip galvanized in accordance with ASTM A 153.

Provide carbon steel bolts having special wedge-shaped heads, nuts, washers, and shims, galvanized in accordance with ASTM A 153. Provide slotted-type concrete inserts consisting of galvanized 1/8-inch thick pressed steel plate conforming to ASTM A 283;

they must be of box-type welded construction with slot designed to receive 3/4-inch diameter square-head bolt with knockout cover; and hot-dip galvanized in accordance with ASTM A 123.

2.5 MASONRY ANCHORAGE DEVICES

Provide masonry anchorage devices consisting of expansion shields complying with

AASHTO M 314, ASTM E 488 and ASTM C 514 as follows:

Provide lead expansion shields for machine screws and bolts 1/4 inch and smaller; head-out embedded nut type, single unit class, Group I, Type 1, Class 1.

Provide lead expansion shields for machine screws and bolts larger than 1/4 inch in size;

head-out embedded nut type, multiple unit class, Group I, Type 1, Class 2.

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Provide bolt anchor expansion shields for lag bolts; zinc-alloy, long shield anchors class, Group II, Type 1, Class 1.

Provide bolt anchor expansion shields for bolts; closed-end bottom bearing class, Group

II, Type 2, Class 1.

Provide tumble-wing type toggle bolts conforming to ASTM A 325, ASTM A 449 and

ASTM C 636, type, class, and style as required.

2.6 FASTENERS

Galvanize zinc-coated fasteners in accordance with ASTM A 153 and used for exterior applications or where built into exterior walls or floor systems. Select fasteners for the type, grade, and class required for the installation of steel stair items.

Standard bolts and nuts must be regular hexagon-head conforming to ASTM A 307, Grade A.

Lag bolts must be square-head conforming to ASME B18.2.1.

Machine screws cadmium-plated steel conforming to ASME B18.6.3.

Wood screws must be flat-head carbon steel conforming to ASME B18.6.1.

Plain washers must be round, general-assembly-grade, carbon steel conforming to ANSI

B18.22.1.

Lockwashers must be helical spring, carbon steel conforming to ASME B18.2.1.

2.7 GENERAL FABRICATION

Provide railings, handrails and steel stair system shop drawings with detail plans and elevations at not less than 1 inch to 1 foot. Provide details of sections and connections at not less than 3 inches to 1 foot. Also detail setting drawings, diagrams, templates for installation of anchorages, including concrete inserts, anchor bolts, and miscellaneous metal items having integral anchors.

Use materials of size and thicknesses indicated or, if not indicated, of required size and thickness to produce adequate strength and durability in finished product for intended use. Work materials to dimensions indicated on approved detail drawings, using proven details of fabrication and support. Use type of materials indicated or specified for the various components of work.

Form exposed work true to line and level with accurate angles and surfaces and straight sharp edges. Exposed edges must be eased to a radius of approximately 1/32 inch. Bend

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Section J – Attachment 2V Page 7 of 11 8 Feb 2010 metal corners to the smallest radius possible without causing grain separation or otherwise impairing the work.

Weld corners and seams continuously and in accordance with the recommendations of

AWS D1.1. Grind exposed welds smooth and flush to match and blend with adjoining surfaces.

Form exposed connections with hairline joints that are flush and smooth, using concealed fasteners wherever possible. Use exposed fasteners of the type indicated or, if not indicated, use Phillips flathead (countersunk) screws or bolts.

Provide anchorage of the type indicated and coordinated with the supporting structure.

Fabricate anchoring devices and space as indicated and as required to provide adequate support for the intended use of the work.

Use hot-rolled steel bars for work fabricated from bar stock unless work is indicated or specified to be fabricated from cold-finished or cold-rolled stock.

2.8 PROTECTIVE COATINGS

2.8.1 Provide protective coating as indicated

2.8.2 Shop Prime

Shop prime steelwork with red oxide primer in accordance with SSPC Paint 25.

Shop prime steelwork with red oxide primer in accordance with SSPC Paint 25.

Shop prime steelwork as indicated in accordance with AISC/AISI 121 except surfaces of steel to be encased in concrete, surfaces to be welded, contact surfaces to be high-strength bolt connected, and surfaces of crane rails.

2.8.3 Galvanized

Provide hot dipped galvanized steelwork as indicated in accordance with ASTM A 123.

Touch up abraded surfaces and cut ends of galvanized members with zinc-dust, zinc-oxide primer, or an approved galvanizing repair compound.

2.9 STEEL RAILINGS AND HANDRAILS

Design handrails to resist a concentrated load of 250 lbs in any direction at any point of the top of the rail or 20 lbs per foot applied horizontally to top of the rail, whichever is more severe. NAAMM AMP 521, provide the same size rail and post. Provide pipe collars of the same material and finish as the handrail and posts. Provide series 300 stainless steel pipe collars.

2.9.1 Steel Handrails

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Provide steel handrails, including inserts in concrete, steel pipe conforming to ASTM A

53 or coordinate with par 2.3 structural tubing conforming to ASTM A 500, Grade A or

B of equivalent strength. Provide steel railings of 1 1/2 inch nominal size. Railings to be hot-dip galvanized and shop painted.

a. Fabrication: Joint posts, rail, and corners by one of the following methods:

(1) Flush-type rail fittings of commercial standard, welded and ground smooth with railing splice locks secured with 3/8 inch hexagonal-recessed-head setscrews.

(2) Mitered and welded joints made by fitting post to top rail and intermediate rail to post, mitering corners, groove welding joints, and grinding smooth. Butt railing splices and reinforce them by a tight fitting interior sleeve not less than 6 inches long.

(3) Railings may be bent at corners in lieu of jointing, provided bends are made in suitable jigs and the pipe is not crushed.

b. Provide removable sections as indicated. Provide kickplates between railing posts where indicated, and consist of 1/8-inch steel flat bars not less than 6 inches high. Secure kickplates as indicated.

Provide galvanized railings, including pipe, fittings, brackets, fasteners, and other ferrous metal components.

2.10 ALUMINUM RAILINGS AND HANDRAILS

Consists of 1 1/2 inch nominal schedule 40 pipe ASTM B 429. Railings to be anodized aluminum color as indicated. All fasteners must be Series 300 stainless steel.

a. Fabrication: Provide jointing by one of the following methods:

(1) Flush-type rail fittings, welded and ground smooth with splice locks secured with 3/8 inch recessed head set screws.

(2) Mitered and welded joints made by fitting post to top rail, intermediate rail to post, and corners, must be groove welded and ground smooth. Provide butted splices, where allowed by the Contracting Officer, and reinforced by a tight fitting dowel or sleeve not less than 6 inches in length. Tack weld or epoxy cement dowel or sleeve to one side of the splice.

(3) Assemble railings using slip-on aluminum-magnesium alloy fittings for joints.

Fasten fittings to pipe or tube with 1/4 or 3/8 inch stainless steel recessed head setscrews.

Provide assembled railings with fittings only at vertical supports or at rail terminations attached to walls. Provide expansion joints at the midpoint of panels. Provide a setscrew in only one side of the slip-on sleeve. Provide alloy fittings to conform to ASTM B 26.

Section J – Attachment 2V Page 9 of 11 8 Feb 2010

b. Removable railing sections: Provide removable railing sections as indicated. Provide toe-boards and brackets where indicated, using flange castings as appropriate.2.11

GUARDRAILS

Provide guardrail similar to handrail fabrication type. Locate guard rails where indicated.

Mount the top rail 3 feet 6 inches above the floor surface and mount the lower rail 2 feet above the floor surface.

2.12 Steel Stair System

Provide steel stairs complete with stringers, grating treads, landings, columns, handrails, and necessary bolts and other fastenings. Hot-dip galvanize steel stairs and accessories.

2.12.1 Design Loads

Design stairs to sustain a live load of not less than 500 pounds per square foot, or a concentrated load of 1000 applied where it is most critical. Conform to AISC 360 or

AISC 350 with the design and fabrication of steel stairs, other than a commercial product.

2.12.2 Materials

Provide steel stairs of welded construction except that bolts may be used where welding is not practicable. Screw or screw-type connections are not permitted.

a. Structural Steel: ASTM A 36.

b. Gratings for Treads and Landings: NAAMM MBG 531 Provide gratings with nonslip nosings.

c. Support steel grating on angle cleats welded to stringers or treads with integral cleats, welded or bolted to the stringer. Close exposed ends. For exterior stairs, form all exposed joints to exclude water.

d. Before fabrication, obtain necessary field measurements and verify drawing dimensions.

e. Clean metal surfaces free from mill scale, flake rust and rust pitting prior to shop finishing. Weld permanent connections. Finish welds flush and smooth on surfaces that will be exposed after installation.

PART 3 EXECUTION

3.1 STAIR RAILINGS AND HANDRAILS

Adjust railings prior to securing in place to ensure proper matching at butting joints and correct alignment throughout their length. Space posts not more than 8 feet on center.

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Section J – Attachment 2V Page 10 of 11 8 Feb 2010

Plumb posts in each direction. Secure posts and rail ends to building construction as follows:

Anchor posts in concrete by means of pipe sleeves set and anchored into concrete.

Provide sleeves of galvanized, standard weight, steel pipe, not less than 6 inches long, and having an inside diameter not less than 1/2-inch greater than the outside diameter of the inserted pipe post. Provide steel plate closure secured to the bottom of the sleeved;

closure must be of width and length not less than 1-inch greater than the outside diameter of the sleeve. After posts have been inserted into sleeves, the annular space between post and sleeve must be filled with molten lead, sulfur, or a quick-setting hydraulic cement.

Cover anchorage joint with a round steel flange welded to the post.

Anchor posts to steel with steel oval flanges, angle type or floor type as required by conditions, welded to posts and bolted to the steel supporting members.

Anchor rail ends into concrete and masonry with steel round flanges welded to rail ends and anchored into the wall construction with lead expansion shields and bolts.

Anchor rail ends to steel with steel oval or round flanges welded to tail ends and bolted to the structural steel members.

Secure handrails to walls by means of wall brackets and wall return fitting at handrail ends. Provide brackets of malleable iron castings, with not less than 3-inch projection from the finish wall surface to the center of the pipe drilled to receive one 3/8-inch bolt.

Locate brackets not more than 60 inches on center. Provide wall return fittings of cast iron castings, flush-type, with the same projection as that specified for wall brackets.

Secure wall brackets and wall return fittings to building construction as follows:

For concrete and solid masonry anchorage, use bolt anchor expansion shields and lag bolts.

For hollow masonry and stud partition anchorage, use toggle bolts having square heads.

Install toeboards and brackets where indicated. Make splices, where required, at expansion joints.

3.2 STEEL HANDRAIL

Install in pipe sleeves embedded in concrete and filled with non-shrink grout or quick setting anchoring cement with anchorage covered with standard pipe collar pinned to post, by means of pipe sleeves secured to wood with screws, masonry with expansion shields and bolts or toggle bolts, or by means of base plates bolted to stringers or structural steel frame work. Secure rail ends by steel pipe flanges anchored by expansion shields and bolts or through-bolted to a back plate or by 1/4 inch lag bolts to studs or solid backing.

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Section J – Attachment 2V Page 11 of 11 8 Feb 2010

3.3 ALUMINUM HANDRAIL

Affix to base structure by flanges anchored to concrete or other existing masonry by expansion shields, base plates or flanges bolted to stringers or structural steel framework, flanges through-bolted to a backing plate on other side of a wall or flanges lag bolted to studs or other structural timbers. Provide Series 300 stainless steel bolts to anchor aluminum alloy flanges, of a size appropriate to the standard product of the manufacturer.

Where aluminum or alloy fittings or extrusions are to be in contact with dissimilar metals or concrete, give the contact surface a heavy coating of bituminous paint.

3.4 STEEL STAIRS

Provide anchor bolts, grating fasteners, washers, and all parts or devices necessary for proper installation. Provide lock washers under nuts.

3.5 FIELD WELDING

Procedures of manual shielded metal arc welding, appearance and quality of welds made, and methods used in correcting welding work must comply with AWS D1.1.

3.6 TOUCHUP PAINTING

Immediately after installation, clean field welds, bolted connections, and abraded areas of the shop paint and exposed areas painted with the paint used for shop painting. Apply paint by brush or spray to provide a minimum dry-film thickness of 2 mils.

--End of Section--