B08_Attach_97_REV_1st_Bank_057300_Decorative_Metal_Railings_0007.pdf

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PMIS 245589 DECORATIVE METAL RAILINGS

SECTION 05 73 00 -- DECORATIVE METAL RAILINGS

PART 1 -- GENERAL

1.1 SUMMARY

A. Fabrication and installation of new steel extension to augment existing guardrail at mezzanine.

B. Fabrication and installation of new custom decorative bronze wall-mounted and freestanding handrails at historic building

C. Fabrication and installation of new custom steel and bronze handrail, stair and guard railings at addition.

D. Fabrication and installation of new decorative steel guardrail at existing historic stair. Railings to match existing but code-compliant height as indicated.

1.2 RELATED WORK

A. Division 1 requirements

B. Section 05 51 13, “Metal Pan Stairs”

C. Section 05 57 13, “Glazed Decorative Metal Railings”

D. Section 09 91 23, “Interior Painting”

1.3 SUBMITTALS

A. Shop Drawings: Submit fabricator/manufacturer’s shop drawings for all new metal railings. Shop drawings shall indicate dimensions, materials, anchorage and installation details.

1. New metal guardrail extensions

2. New wall-mounted and freestanding handrails

3. New steel and bronze stair and guard railings

4. New steel guardrails

B. Product Data: Post-installed anchors for new metal railings

C. Delegated Design Submittals for railing extensions and all new guardrails

1.4 QUALITY ASSURANCE

A. Structural Performance

1. Handrails and Top Rails of Guards:

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a. Uniform load of 50 lbf/ft. applied in any direction.

b. Concentrated load of 200 lbf applied in any direction.

c. Uniform and concentrated loads need not be assumed to act concurrently.

2. Infill of Guards:

a. Concentrated load of 50 lbf applied horizontally on an area of 1 sq. ft.

b. Infill load and other loads need not be assumed to act concurrently.

1.5 DELIVERY, STORAGE AND HANDLING

A. Deliver new metal railings to the project site securely bundled and packaged on pallets to prevent warping, bending and twisting. Inspect all new materials upon delivery for damage and defects. Do not accept delivery of damaged items.

B. Store new metal railings in a secure location, away from construction operations, at the project site until ready for installation

1.6 PROJECT CONDITIONS

A. The Contractor performing the work of this Section shall exercise care when installing new railings anchored in historic substrates. Avoid scratching, cracking or otherwise damaging historic marble and wood surfaces while installing anchors. Damage to historic substrates shall be repaired by the Contractor to the satisfaction of and at no additional cost to, the Government.

B. Coordinate the fabrication and installation of railings with other trades affected by the work of this Section including, but not limited to, interior stone restoration and painting to avoid damaged to finished work and delays to the project schedule.

PART 2 – PRODUCTS

2.1 IRON AND STEEL

A. Steel

1. Steel Plates, Shapes, and Bars: ASTM A 36

2. Steel Bars: Hot-rolled, carbon steel complying with ASTM A 29, Grade 1010

3. Steel Tubing: ASTM A 500 (cold formed) or ASTM A 513

4. Fasteners: Type 304 stainless steel

5. Recycled content: 20%

6. Primer: Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79 and compatible with topcoat.

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a. Primer Application: Apply shop primer to prepared surfaces of railings unless otherwise indicated. Comply with requirements in SSPC-PA 1, "Paint Application Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting. Primer need not be applied to surfaces to be embedded in concrete or masonry.

7. Finish: Painted. See Section 09 91 23 “Interior Painting”.

2.2 COPPER ALLOYS

A. Bronze

1. Architectural Bronze

a. Extrusions: C38500

b. Castings: C86500

c. Recycled content: 20%

2. Finish (Railings in Historic Portion of the Building): Buffed Finish, Lacquered: M21-O6x (Mechanical Finish: buffed, smooth specular; Coating: clear organic, air dried, as specified below).

a. Clear, Organic Coating: Lacquer specified for copper alloys, applied by air spray in two coats per manufacturer's written instructions, with interim drying, to a total thickness of 1 mil.

3. Finish (Decorative Stair Handrails and Guard Rails in New Addition): Statuary Conversion Coating over Satin Finish: M31-C55 (Mechanical Finish: directionally textured, fine satin;

Chemical Finish: conversion coating, sulfide).

2.3 DECORATIVE METAL RAILINGS

A. Manufacturers:

1. Basis of Design: Julius Blum & Company, Carlstadt, NJ

2. Alternate Manufacturers:

a. New Star Railings, Brooklyn, NY

b. Wagner Companies, Milwaukee, WI

c. Contracting Officer approved equivalent.

B. New Steel Extensions at Mezzanine and Stair Guardrails (Historic Building):

1. Custom-fabricated to dimensions and profiles indicated.

C. Wall-Mounted Handrails (Historic Building)

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1. Basis of Design: Julius Blum & Company, Carlstadt, NJ

a. Handrail profile: Bronze, Julius Blum 4575

b. Provide channel under handrail for mounting.

c. Handrail bracket: Bronze, Julius Blum 370

D. Freestanding Handrails (Historic Building):

1. Basis of Design: Julius Blum & Company, Carlstadt, NJ

a. Handrail profile: Bronze, Julius Blum 4575

b. Provide channel under handrail for mounting.

c. Post: Bronze, Julius Blum 136

d. Base Flange: Bronze, Julius Blum 346

E. New Decorative Bronze Railings (Addition):

1. Basis of Design for Handrail: Julius Blum & Company, Carlstadt, NJ

2. Railing Components:

a. Wall-Mounted Handrail, Stair Railing-Mounted Handrail: 1.5” diameter bronze tube

b. Top and Bottom Rails: Bronze, rectangular cross-section, dimensions as indicated.

c. Pickets: Bronze, square cross-section, dimensions as indicated.

d. Bracket for Handrails: Bronze, Julius Blum 892

2.4 FABRICATION

F. General: Fabricate railings to comply with requirements indicated for design, dimensions, member sizes and spacing, details, finish, and anchorage, but not less than that required to support structural loads.

G. Connections: Fabricate new steel railings with welded connections unless otherwise indicated.

Provide non-welded connections where attaching to existing railings.

H. Welded Connections: Cope components at connections to provide close fit, or use fittings designed for this purpose. Weld all around at connections, including at fittings.

1. At exposed connections, finish exposed welds to comply with NOMMA's "Voluntary Joint Finish Standards" for Type 1 welds; no evidence of a welded joint.

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I. Brazed Connections: Fabricate copper-alloy railing components by brazing. Cope components at connections to provide close fit, or use fittings designed for this purpose. Braze corners and seams continuously.

1. At exposed connections, finish exposed surfaces smooth and blended so no roughness shows after finishing and brazed surface matches contours of adjoining surfaces.

J. Mechanical Connections: Connect bronze railing components with concealed mechanical fasteners and fittings. Fabricate members and fittings to produce flush, smooth, rigid, hairline joints.

K. Form corners and changes in direction by inserting prefabricated elbow fittings.

L. Form curved railing segments by bending.

1. Bend members in jigs to produce uniform curvature for each configuration required; maintain cross section of member throughout entire bend without buckling, twisting, cracking, or otherwise deforming exposed surfaces of components.

M. Close exposed ends of hollow railing members with prefabricated end fittings.

N. Provide wall returns at ends of wall-mounted handrails unless otherwise indicated.

O. Brackets, Flanges, Fittings, and Anchors: Provide wall brackets, flanges, miscellaneous fittings, and anchors to interconnect railing members to other work unless otherwise indicated.

2.5 FASTENERS AND ANCHORS

A. Fastener Materials: Unless otherwise indicated, provide the following:

1. Copper-Alloy (Bronze) Components: Silicon bronze (Alloy 651 or Alloy 655) fasteners.

2. Uncoated Steel Components: Plated-steel fasteners complying with ASTM B 633, Class Fe/Zn 25 for electrodeposited zinc coating where concealed; Type 304 stainless-steel fasteners where exposed.

3. Dissimilar Metals: Type 304 stainless-steel fasteners.

B. Post-Installed Anchors: Fastener systems with working capacity greater than or equal to the design load, according to an evaluation report acceptable to authorities having jurisdiction, based on ICC-ES AC193 (mechanical anchors) or ICC-ES AC308 (adhesive anchors)

1. Material for Interior Locations: Carbon-steel components zinc plated to comply with ASTM B 633 or ASTM F 1941, Class Fe/Zn 5, unless otherwise indicated.

2. Manufacturers: Provide products of one of the following:

a. Hilti

b. Simpson

c. Contracting Officer-approved equivalent

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2.6 MISCELLANEOUS MATERIALS

A. Wood Handrails: White Oak, FAS grade

B. Lacquer for Copper Alloys: Clear acrylic lacquer specially developed for coating copper-alloy products.

PART 3 – EXECUTION

3.1 INSTALLATION

A. Fit exposed connections together to form tight, hairline joints.

B. Perform cutting, drilling, and fitting required for installing railings. Set railings accurately in location, alignment, and elevation; measured from established lines and levels and free of rack.

1. Set posts plumb within a tolerance of 1/16 inch in 3 feet.

2. Align rails so variations from level for horizontal members do not exceed 1/8 inch in 12 feet.

3. and variations from parallel with rake of steps and ramps for sloping members do not exceed

1/4 inch in 12 feet.

C. Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.

D. Use steel pipe flanges anchored to concrete for installing posts.

E. Secure wall brackets to building construction as follows:

1. For concrete and solid masonry anchorage, use drilled-in expansion shields and hanger or lag bolts.

2. For wood substrates, use hanger or lag bolts set into wood backing between studs. Coordinate with carpentry work to locate backing members.

F. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas of shop primer, and paint exposed areas with the same material used for shop priming to comply with SSPC-PA 1 for touching up shop-painted surfaces.

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F. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas of shop primer, and paint exposed areas with the same material used for shop priming to comply with SSPC-PA 1 for touching up shop-painted surfaces.