05_7000_-_DECORATIVE_METAL_0009.pdf

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DECORATIVE METAL

SECTION 05 70 00 - DECORATIVE METAL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Decorative mechanical grilles and frames.

2. Combination hall push-button stations.

3. Decorative bronze sheet metal and trim for wall finish.

4. Decorative bronze sheet metal and trim for elevator cabs.

4.5. Decorative bronze gates, frame and trim.

B. Related Requirements:

1. Section 05 73 00 "Decorative Metal Railings" for decorative metal railings.

1.2. Section 08 71 00 “Door Hardware”.

1.3 COORDINATION

A. Coordinate installation of anchorages for decorative metal items. Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site .

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product, including finishing materials.

B. Sustainable Design Submittals:

1. Product Data: For recycled content, indicating postconsumer and preconsumer recycled content and cost.

C. Shop Drawings: Show fabrication and installation details for decorative metal.

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1. Include plans, elevations, component details, and attachment details.

2. Indicate materials and profiles of each decorative metal member, fittings, joinery, finishes, fasteners, anchorages, and accessory items.

2.3. Dimensions and locations of gate hardware preparation.

D. Samples for Initial Selection: For products involving selection of color, texture, or design including mechanical finishes.

E. Samples for Verification: For each type of exposed finish.

1. Sections of linear shapes.

2. Full-size Samples of castings and forgings.

a. For custom castings, submit finished Samples showing ability to reproduce detail and quality of finish.

3. Samples of brazed joints showing quality of workmanship and color matching of materials.

3.4. Corner sample of entrance gates approximately 12 by 12 inches (305 by 305 mm) with door faces and edges representing actual materials and fabrication techniques to be used.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For fabricator organic-coating applicator .

B. Mill Certificates: Signed by manufacturers of stainless steel certifying that products furnished comply with requirements.

C. Welding certificates.

1.7 QUALITY ASSURANCE

A. Fabricator Qualifications: A firm experienced in producing decorative metal similar to that indicated for this Project and with a record of successful in-service performance, as well as sufficient production capacity to produce required units.

B. Installer Qualifications: Fabricator of products.

C. Organic-Coating Applicator Qualifications: A firm experienced in successfully applying organic coatings, of type indicated, to aluminum extrusions and employing competent control personnel to conduct continuing, effective quality-control program to ensure compliance with requirements.

D. Welding Qualifications: Qualify procedures and personnel according to the following:

1. AWS D1.1/D1.1M, "Structural Welding Code - Steel."

2. AWS D1.2/D1.2M, "Structural Welding Code - Aluminum."

3. AWS D1.3/D1.3M, "Structural Welding Code - Sheet Steel."

4. AWS D1.6/D1.6M, "Structural Welding Code - Stainless Steel."

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1.8 DELIVERY, STORAGE, AND HANDLING

A. Store decorative metal in a well-ventilated area, away from uncured concrete and masonry, and protected from weather, moisture, soiling, abrasion, extreme temperatures, and humidity.

B. Deliver and store cast-metal products in wooden crates surrounded by enough packing material to ensure that products are not cracked or otherwise damaged.

1.9 FIELD CONDITIONS

A. Field Measurements: Verify actual locations of walls and other construction contiguous with decorative metal by field measurements before fabrication and indicate measurements on Shop

Drawings.

B. Environmental Limitations:

A.1. Do not deliver or install gates until spaces are enclosed and weathertight, wet work in spaces in complete and dry, and HVAC system is operating and maintaining temperature and relative humidity levels designed for building occupants for the remainder of construction period.

PART 2 - PRODUCTS

2.1 DECORATIVE METAL FABRICATORS

A. Fabricator: Subject to compliance with requirements, provide products by fabricators meeting project requirements.

2.2 METALS, GENERAL

A. Metal Surfaces, General: Use materials with smooth, flat surfaces unless otherwise indicated.

Use materials without seam marks, roller marks, rolled trade names, stains, discolorations, or blemishes.

2.3 COPPER AND COPPER ALLOYS

A. Fabricate products from alloys indicated and temper to suit application and forming methods but with strength and stiffness not less than H01 (quarter-hard) for plate, sheet, strip, and bars and H55 (light-drawn) for tube and pipe.

2.4 BRONZE

A. Extruded Shapes: ASTM B455, Alloy UNS C38500 (architectural bronze).

B. Castings: ASTM B62, Alloy UNS C83600 (85-5-5-5 or No. 1 composition commercial red brass) or ASTM B584, Alloy UNS C86500 (No. 1 manganese bronze).

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C. Plate, Sheet, Strip, and Bars: ASTM B36/B36M, Alloy UNS C28000 (muntz metal, 60 percent copper).

2.5 FASTENERS

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

1. Copper-Alloy (Bronze) Items: Silicon bronze (Alloy 651 or Alloy 655) fasteners where concealed, muntz metal (Alloy 280) fasteners where exposed.

B. Fasteners for Anchoring to Other Construction: Unless otherwise indicated, select fasteners of type, grade, and class required to produce connections suitable for anchoring indicated items to other types of construction indicated.

C. Provide concealed fasteners for interconnecting components and for attaching decorative metal items to other work unless otherwise indicated .

1. Provide tamper-resistant flat-head machine screws for exposed fasteners unless otherwise indicated.

D. Post-Installed Anchors: Fastener systems with an evaluation report acceptable to authorities having jurisdiction, based on ICC-ES AC193.

1. Material for Interior Locations: Carbon-steel components zinc plated to comply with

ASTM B633 or ASTM F1941, Class Fe/Zn 5 unless otherwise indicated.

2.6 MISCELLANEOUS MATERIALS

A. Welding Rods and Bare Electrodes: Select according to AWS specifications for metal alloy welded.

B. Brazing Rods: For copper alloys, provide type and alloy as recommended by producer of metal to be brazed and as required for color match, strength, and compatibility in fabricated items.

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

2.7 FABRICATION, GENERAL

A. Assemble items in the shop to greatest extent possible to minimize field splicing and assembly.

1. Disassemble units only as necessary for shipping and handling limitations.

2. Clearly mark units for reassembly and coordinated installation.

3. Use connections that maintain structural value of joined pieces.

B. Form decorative metal to required shapes and sizes, true to line and level with true curves and accurate angles and surfaces. Finish exposed surfaces to smooth, sharp, well-defined lines and arris.

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C. Form bent-metal corners to smallest radius possible without causing grain separation or otherwise impairing the Work.

D. Form simple and compound curves in bars, pipe, tubing, and extruded shapes by bending 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.

E. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch unless otherwise indicated. Remove sharp or rough areas on exposed surfaces.

F. Mill joints to a tight, hairline fit. Cope or miter corner joints. Fabricate connections that will be exposed to weather in a manner to exclude water.

G. Provide weep holes where water may accumulate. Locate weep holes in inconspicuous locations.

H. Provide necessary rebates, lugs, and brackets to assemble units and to attach to other work. Cut, reinforce, drill, and tap as needed to receive finish hardware, screws, and similar items unless otherwise indicated.

I. Comply with AWS for recommended practices in shop brazing . braze behind finished surfaces without distorting or discoloring exposed side. Clean exposed brazed joints of flux, and dress exposed and contact surfaces.

1. Where brazing cannot be concealed behind finished surfaces, finish joints to comply with

NOMMA's "Voluntary Joint Finish Standards" for Type 1 Welds: no evidence of a welded joint .

J. Provide castings that are sound and free of warp, cracks, blowholes, or other defects that impair strength or appearance. Grind, wire brush, sandblast, and buff castings to remove seams, gate marks, casting flash, and other casting marks.

K. Toe Boards: Where indicated, provide toe boards at railings around openings and at edge of open-sided floors and platforms. Fabricate to dimensions and details indicated.

2.8 DECORATIVE MECHANICAL GRILLES

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Coco Architectural.

a. CA100 Linear Bar Grille

B. Fabricate decorative grilles from perforated bronze sheet or plate of thickness, size, and pattern indicated. Form perforations by punching, cutting, or drilling to produce openings of sizes and shapes indicated. Roll, press, and grind perforated metal to flatten and to remove burrs and deformations.

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1. Form perforations to match existing grilles.

2. Drawings indicate perforated metal patterns required and are based on products of one manufacturer. Perforated metal patterns produced by other manufacturers may be considered, provided deviations are minor and do not change design concept as judged solely by Architect.

C. Fabricate grille frames from extruded bronze of profiles and to sizes and shapes indicated. Miter frame members at corners and connect with concealed splice plates brazed to back of frames.

1. Secure grilles in frames with 0.5-inch-long brazing along perimeter of grilles at 4 inches o.c.

2. Provide frame profiles to match existing frames.

3. Drawings indicate frame profiles required and are based on products of one manufacturer. Similar frame profiles produced by other manufacturers may be considered, provided deviations are minor and do not change design concept as judged solely by Architect.

2.9 BRONZE SHEET METAL

A. General: Provide decorative metal materials made of the alloys, forms, and types that match existing metals and have the ability to receive finishes matching existing finishes unless otherwise indicated. Exposed-to-view surfaces exhibiting imperfections inconsistent with existing materials are unacceptable.

B. General: Fabricate products from sheet metal without pitting, seam marks, roller marks, stains, discolorations, or other imperfections where exposed to view on finished units.

C. Source Limitation: Obtain castings for decorative metal from single source from single manufacturer with resources to provide materials of consistent quality in appearance and physical properties.

D. Bronze Sheet: ASTM B 36/B 36M, Alloy UNS C28000 (muntz metal, 60 percent copper) or

Alloy UNS C23000 (red brass, 85 percent copper).

E. Bronze Trim: Copper Alloys, Bronze: Copper alloy designated below for each form required.

1. Extruded Shapes: ASTM B 455, Alloy UNS No. C38500 (extruded architectural bronze, 57 percent copper and 40 percent zinc).

2. Plate, Sheet, Strip, and Bars: ASTM B 36/B 36M, Alloy UNS No. C28000 (muntz metal, 60 percent copper and 40 percent zinc).

3. Seamless Pipe: ASTM B 43, Alloy UNS No. C23000 (red brass, 85 percent copper and

15 percent zinc).

4. Seamless Tubes: ASTM B 135 (ASTM B 135M), Alloy UNS No. C23000 (red brass, 85 percent copper and 15 percent zinc).

2.10 CLADDING AND TRIM FOR ELEVATORS AND BUILDING ENTRANCE GATES

A. Provide cladding and trim as follows. Coordinate with requirements of adjoining elevator components.

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1. Cab: Doors, returns, side walls, rear wall, handrails.

2. Hoistway entrance: Doors and frame.

2.3. Entrance gates: Doors and frame.

B. Materials:

1. Trim: Bonze bars, flats and shapes.

2. Cladding: Bronze sheet, of specified type, alloy, heat treatment and finish required to produce Work indicated: minimum 0.0403 inch thick.

3. Paneling: Cambridge Architectural Products: Tile

C. Coordinate elevator work with Division 14 Section.

D. Finish: As indicated on Contract Drawings.

2.11 FABRICATION OF COMBINATION HALL PUSH-BUTTON STATIONS

A. Fabricate units of bronze to comply with details indicated. Coordinate with elevator signal equipment to provide integrated, closely fitted assemblies.

1. Fabricate faceplates from 1/8-inch-thick sheet with edges beveled at a 45-degree angle for one-half thickness of metal.

2. Provide units with rectangular, split-bowl trash receptacle, designed for recess mounting in nominal 4-inch wall depth. Fabricate recessed cabinets, top rings, and split bowls of same metal as face of units; fabricate removable receptacles of drawn aluminum.

Nominal dimensions of units are 10 by 10 by 3-1/2 inches in depth.

3. Provide units with emergency pictorial signs and text, complying with requirements of authorities having jurisdiction, indicating that in fire emergency, elevators should not be used and that stairways should be used instead. Engrave pictorial sign and text into front surface of faceplates to a depth of 1/16 inch with engraving painted red. Make signs 5 inches wide by 8 inches high.

4. Provide cutouts in faceplates of units for push buttons of elevator hall push-button station

, card reader, and elevator key switches. Coordinate locations and sizes of cutouts so additional faceplate is not required and so faces of push buttons are flush with fronts of faceplates and key switches project beyond faceplate only by depth of bezel.

2.12 FINISHES, GENERAL

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Protect mechanical finishes on exposed surfaces from damage by applying a strippable, temporary protective covering before shipping.

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2.13 COPPER-ALLOY FINISHES

A. Finish designations for copper alloys comply with the system established for designating copper-alloy finish systems defined in NAAMM's "Metal Finishes Manual for Architectural and

Metal Products."

B. Medium-Satin Finish, Lacquered: M32-O6x (Mechanical Finish: directionally textured, medium satin; Coating: clear, organic, air dried, as specified below):

1. 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.

C. Patina Conversion Coating: M36-C12-C52 (Mechanical Finish: directionally textured, uniform;

Chemical Finish: nonetched cleaned, degreased; Chemical Finish: conversion coating, ammonium sulfate) , with color matching Architect's sample.

D. Blackened, Bright Relieved, and Lacquered: M33-O60-M2x-O6x (Mechanical Finish:

directionally textured, coarse satin; Coating: black, air dried; Mechanical Finish: buffed, as specified; Coating: clear, organic, air dried, as specified below) , with blackening and buffing matching Architect's sample:

1. 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.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of decorative metal.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION, GENERAL

A. Provide anchorage devices and fasteners where needed to secure decorative metal to in-place construction.

B. Perform cutting, drilling, and fitting required to install decorative metal. Set products accurately in location, alignment, and elevation, measured from established lines and levels. Provide temporary bracing or anchors in formwork for items to be built into concrete, masonry, or similar construction.

C. Fit exposed connections accurately together to form tight, hairline joints or, where indicated, uniform reveals and spaces for sealants and joint fillers. Where cutting, welding, and grinding are required for proper shop fitting and jointing of decorative metal, restore finishes to eliminate evidence of such corrective work.

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D. Do not cut or abrade finishes that cannot be completely restored in the field. Return items with such finishes to the shop for required alterations, followed by complete refinishing, or provide new units as required.

E. Install concealed gaskets, joint fillers, insulation, and flashings as work progresses.

F. Restore protective coverings that have been damaged during shipment or installation. Remove protective coverings only when there is no possibility of damage from other work yet to be performed at same location.

1. Retain protective coverings intact; remove coverings simultaneously from similarly finished items to preclude nonuniform oxidation and discoloration.

G. Field Welding: Comply with applicable AWS specification for procedures of manual shielded metal arc welding and requirements for welding and for finishing welded connections in

"Fabrication, General" Article. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations.

H. Field Brazing: Comply with requirements for brazing and for finishing brazed connections in

"Fabrication, General" Article. Braze connections that are not to be left as exposed joints but cannot be shop brazed because of shipping size limitations.

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

1. Coat concealed surfaces of aluminum that will be in contact with grout, concrete, masonry, wood, or dissimilar metals, with a heavy coat of bituminous paint.

3.3 INSTALLATION OF DECORATIVE MECHANICAL GRILLES

A. Mount decorative grilles at heights and in positions indicated, adjusting ductwork to be centered on grilles if any.

1. Secure to framing and blocking with specified fasteners.

2. On marble, brick, and other solid surfaces, secure with wood screws in plastic plugs.

3.4 INSTALLATION OF COMBINATION HALL PUSH-BUTTON STATIONS

A. Coordinate installation of combination hall push-button stations with installation of related elevator signal equipment components. Secure units in place with faceplate overlapping surrounding wall finish and drawn into contact with surrounding wall finish at entire perimeter of faceplate.

3.5 INSTALLATION OF GATES.

A. Examination:

1. Examine gates and installed frames with installer present, before hanging doors.

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a. Verify that installed frames comply with indicated requirements for type, size, location adnn swing characteristics and have been installed with level heads and plumb jams.

b. Reject gates with defects.

2. Proceed with installation only after unsatisfactory conditions have been corrected.

B. Installation:

1. Hardware: For installation, see Section 08 71 00 “Door Hardware”.

2. Install gates as indicated.

C. Job-Fitted Gates:

1. Align at gates in frames with uniform clearances and bevels as indicated below.

2. Machine doors for hardware.

3. Clearances:

a. Provide 1/8 inch (3 mm) at heads, jambs, and between pairs of gates.

b. Provide ½ inch (13 m) from bottom of gate to top of decorative floor finish or covering.

c. Where threshold is shown on drawings or scheduled, provide not more than 3/8 inch (10 mm) from bottom of gate to top of threshold.

4. Provide bevel of 1/8 inch in 2 inches (3-1/2 degrees) at lock and hinge edges.

5. Factory machine gates for hardware that is not surface applied.

a. Locate hardware to comply with DHI-WDHS-3.

b. Comply with final hardware schedules, gate and frame shop drawings, BHMA0156.115-W, and hardware templates.

c. Coordinate measurements of hardware mortises in metal frames to verify dimensions and alignment before factory machining.

D. Adjusting

1. Operation: Rehang or replace gates that do not swing or operate freely.

2. Finished Gates: Replace gates that are damaged or do not comply with requirements.

Gates may be repaired or refinish if Work complies with requirements and shows no evidence of repair or refinishing.

3.53.6 CLEANING AND PROTECTION

A. Unless otherwise indicated, clean metals by washing thoroughly with clean water and soap, rinsing with clean water, and drying with soft cloths.

B. Clean copper alloys according to metal finisher's written instructions in a manner that leaves an undamaged and uniform finish matching approved Sample.

C. Touchup Painting:

1. Cleaning and touchup painting of field welds, bolted connections, and abraded areas of shop paint are specified in

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D. Protect finishes of decorative metal from damage during construction period with temporary protective coverings approved by decorative metal fabricator. Remove protective covering at time of Substantial Completion.

E. Restore finishes damaged during installation and construction period so no evidence remains of correction work. Return items that cannot be refinished in the field to the shop; make required alterations and refinish entire unit, or provide new units.

END OF SECTION 05 70 00