36C24420R0017-0003007.doc

VA Project No. 460-322

Wilmington VAMC

AE Works Project No. 16025

New Administrative Building

SECTION 07 41 13

STANDING SEAM METAL ROOF PANEL

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Standing seam metal roof panel system.

1.2 RELATED REQUIREMENTS

A. Division 05 Section "Cold-Formed Metal Framing" for cold-formed metal framing supporting metal roof panel.

B. Division 05 Section "Steel Decking" for steel roof deck supporting standing seam metal roof panel.

C. Division 07 Section "Thermal Insulation" for field installed thermal insulation.

D. Division 07 Section "Sheet Metal Flashing and Trim" for sheet metal copings, flashings, reglets and roof drainage items not specified in this Section.

E. Division 07 Section "Manufactured Roof Specialties" for manufactured copings, reglets, and roof drainage items.

F. Division 07 Section "Roof Accessories" for roof hatches, smoke vents, equipment curbs, and equipment supports.

G. Division 07 Section "Joint Sealants" for field-applied joint sealants.

1.3 SYSTEM DESCRIPTION

A. Metal Roof Panel System: Metal roof panels with concealed attachment and accessories necessary for a complete watertight installation.

1.4 PERFORMANCE REQUIREMENTS

A. General: Provide metal roof panel system meeting performance requirements as determined by application of specified tests by a qualified testing agency on manufacturer's standard assemblies.

B. Air Infiltration: Maximum 0.03 cfm/sq. ft. (0.3 L/s per sq. m) per ASTM E 1680 at a static-air-pressure difference of 4 lbf/sq. ft. (191.5 Pa).

C. Water Penetration Static Pressure: No uncontrolled water penetration at a static pressure of 6.4 lbf/sq. ft(306.4 Pa) when tested per ASTM E 1646.

D. Structural Performance: Provide metal roof panel system capable of withstanding the effects of indicated loads and stresses within limits and under conditions indicated, per ASTM based on testing according to ASTM E 1592:

1. Wind Loads: Determine loads based on uniform pressure, importance factor, exposure category, and basic wind speed indicated on drawings.

2. Snow Loads: As indicated on Drawings

3. Deflection Limits: Metal roof panel system shall withstand wind and snow loads with vertical deflections no greater than 1/180 of the span

4. Concentrated Load Performance: Provide metal roof panel system that withstand a concentrated load of 250 lbs (113 kg) applied to a 4 sq. in. (2580 sq. mm) at midspan and center of the panel halfway between supports without causing deformation, buckling or side lap separation.

E. FMG Listing: Comply with FMG 4471. Provide metal roof panel assembly listed in FMG’s "Approval Guide."

1. Fire and Windstorm Classification: Class 1A-90.

2. Hail Resistance: SH.

F. Wind Uplift Resistance: UL 580 wind uplift rating UL 90.

G. Thermal Movements: Allow for thermal movements from variations in both ambient and internal temperatures. Accommodate movement of support structure caused by thermal expansion and contraction.

1. Thermal Cycle test: Provide metal roof panel system that shows no wear when subject to 100,000 cycles of 1-inch (25 mm) movement in the plane of the panel face relative to the clip anchor.

1.5 QUALITY ASSURANCE

A. Manufacturer/Source: Provide metal roof panel system from a single manufacturer.

B. Manufacturer Qualifications: Approved manufacturer listed in this Section with minimum 5 years experience in manufacture of similar products in successful use in similar applications.

1. Approval of Comparable Products: Submit the following in accordance with project substitution requirements, within time allowed for substitution review:

a. Product data, including certified independent test data indicating compliance with requirements.

b. Samples of each component.

c. Sample submittal from similar project.

d. Project references: Minimum of 5 installations not less than 5 years old, with Owner and Architect contact information.

e. Sample warranty.

2. Substitutions following award of contract are not allowed except as stipulated in Division 01 "General Requirements."

3. Approved manufacturers must meet separate requirements of Submittals Article.

C. Installer Qualifications: Experienced Installer with minimum of 5 years experience with successfully completed projects of a similar nature and scope.

1.6 ADMINISTRATIVE REQUIREMENTS

A. Preinstallation Meeting: Prior to erection of metal roof panel system, conduct preinstallation meeting at site attended by Owner, Architect, manufacturer's technical representative, inspection agency and related trade contractors.

1. Coordinate building framing in relation to metal roof panel system.

2. Coordinate openings and penetrations of metal roof panel system.

3. Coordinate work of Division 07 Sections "Roof Specialties" and "Roof Accessories" and roof openings and penetrations and manufacturer's accessories with installation of metal roof panels.

1.7 ACTION SUBMITTALS

A. Product Data: Manufacturer’s data sheets for specified products.

B. Shop Drawings: Show layouts of metal roof panels. Include details of each condition of installation, panel profiles, and attachment to building. Provide details at a minimum scale 1-1/2-inch per foot of edge conditions, joints, fastener and sealant placement, flashings, penetrations, and special details. Make distinctions between factory and field assembled work.

1. Include data indicating compliance with performance requirements.

2. Indicate points of supporting structure that must coordinate with metal roof panel system installation.

3. Include structural data indicating compliance with performance requirements and requirements of local authorities having jurisdiction.

C. Samples for Initial Selection: For each product specified including sealants and gaskets. Provide representative color charts of manufacturer's full range of colors.

D. Samples for Verification: Provide 12-inch- (305 mm-) long section of metal roof panel showing finishes, vertical joint return, and anchoring details. Provide 12-inch- (305 mm-) long pieces of trim.

1.8 INFORMATIONAL SUBMITTALS

A. Product Test Reports: Indicating compliance of products with requirements, from a qualified independent testing agency, when requested by architect.

B. Coordination Drawings: Provide drawings of metal roof panel system coordinating the installation with structural framing, secondary framing, roof deck, penetrations, openings, and mechanical attachments.

C. Qualification Information: For Installer firm and Installer’s field supervisor.

D. Manufacturer's warranty: Submit sample warranty.

1.9 CLOSEOUT SUBMITTALS

A. Maintenance data.

1.10 DELIVERY, STORAGE, AND HANDLING

A. Protect products of metal roof panel system during shipping, handling, and storage to prevent staining, denting, deterioration of components or other damage. Protect panels and trim bundles during shipping with water resistant paper. Protect painted surfaces with a strippable protective covering before shipping.

1. Deliver, unload, store, and erect metal roof panel system and accessory items without misshaping panels or exposing panels to surface damage from weather or construction operations.

2. Store in accordance with Manufacturer's written instruction. Provide wood collars for stacking and handling in the field.

1.11 WARRANTY

A. Special Manufacturer’s Warranty: On Manufacturer’s standard form, in which Manufacturer agrees to repair or replace components of metal roof panel system that fail in materials and workmanship within two years from date of Substantial Completion.

B. Metal Panel Warranty: On Manufacturer’s standard form, in which Manufacturer agrees to repair or replace metal panels that rupture or perforate due to corrosion within 20 years from date of Substantial Completion.

C. Special Weathertight Performance Warranty: On Manufacturer's standard form, in which Manufacturer and Installer agree to pay the cost of repair or replacement of components of metal roof panel system that fail to remain weathertight for a period of 10 years from date of Substantial Completion, up to the cost of the initial material purchase order and initial installation labor cost.

D. Special Panel Finish Warranty: On Manufacturer’s standard form, in which Manufacturer agrees to repair or replace metal roof panels that evidence deterioration of factory-applied finish within 20 years from date of Substantial Completion, including:

1. Color fading in excess of 5 Hunter units per ASTM D 2244.

2. Chalking in excess of No. 8 rating per ASTM D 4214.

3. Failure of adhesion, peeling, checking, or cracking.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Basis of Design: CENTRIA, SRS3 Structural Standing Seam Metal Roof Panel System.

1. CENTRIA Architectural Systems; Moon Township, PA 15108-2944. Tel: (800)759-7474. Tel: (412)299-8000. Fax: (412)299-8317. Email: info@CENTRIA.com. Web: www.CENTRIA.com.

2.2 MATERIALS

A. Metallic-Coated Steel Face Sheet: Coil-coated, ASTM A 755/A 755M.

1. Aluminum-Zinc Coated Steel Sheet: ASTM A 792/A 792, Grade 50B, class AZ50 Galvalume coating designation, and structural quality.

2. Face Sheet: Minimum 0.036 inch/20 gage (0.91 mm) nominal uncoated thickness.

3. Surface: Smooth.

2.3 STANDING SEAM METAL ROOF PANELS

A. Structural Standing Seam Metal Roof Panels: Formed with 3 inch (76 mm) high vertical ribs at panel edges and evenly spaced raised longitudinal planks, manufactured for sequential installation by attaching panels to supports using concealed clips and engaging edges of adjacent panels and mechanically seaming panel ribs together, sealed with factory-applied sealant.

1. Panel Coverage: 16 inch (406 mm).

2. Anchor Clips:

a. Galvanized steel G90, 1-piece, 16 ga., movement allowance, minimum 2 inch (51 mm).

2.4 FINISHES

A. Exposed Coil-Coated Finish System:

1. Fluoropolymer Two-Coat System: 0.2-mil primer with 0.8-mil 70 percent PVDF fluoropolymer color coat, AAMA 621.

a. Basis of Design: CENTRIA Fluorofinish.

B. Color: Exterior Surface Color: 9917 Light Gray.

2.5 METAL ROOF PANEL ACCESSORIES

A. Provide complete metal roof panel assembly incorporating trim, copings, fasciae, soffits, downspouts, insulation spacers and miscellaneous flashings. Provide required fasteners, gaskets, closure strips, and sealants. Fabricate and install accessories in accordance with SMACNA Manual.

1. Steel Roof Panel Systems: Comply with ASTM E 1514.

2. Flashing and Trim: Match material, thickness, and finish of metal roof panels.

B. Panel Fasteners: Self-tapping screws, bolts, nuts, and other acceptable fasteners recommended by roof panel manufacturer. Where exposed fasteners cannot be avoided, supply corrosion-resistant fasteners with heads matching color of metal panels by means of factory-applied coating.

1. Exposed Screws: Manufacturer's recommended stainless-steel screws with bonded neoprene and stainless steel washers, coated to match panel color.

2. Concealed Screws: Manufacturer's recommended corrosion resistant carbon steel with corrosion resistant coating.

C. Panel Sealants:

1. Side Lap Sealant: One-part, non-skinning, non-drying, synthetic butyl elastomer sealant.

2. Field Applied Unexposed Sealant: Side Laps, end laps, and flashing details: Gun grade, nonskinning, butyl elastomer or polymeric non-skinning butyl tape.

3. Exposed Sealant: ASTM C 920; elastomeric polyurethane, polysulfide, or silicone sealant; of type, grade, class, and use classifications required to seal joints in metal roof panels and remain weathertight; as recommended by metal roof panel manufacturer colored to match panel color.

D. Pipe Flashings: Molded EPDM, with metal collar.

2.6 SECONDARY METAL FRAMING

A. Miscellaneous Framing Components, General: Cold-formed metallic-coated steel sheet, ASTM A 653/A 653M, G90 (Z180).

1. Hat Channels: 0.053 inch/16 ga. (1.34 mm) minimum.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine metal roof panel system substrate with Installer present. Inspect for erection tolerances and other conditions that would B. adversely affect installation of metal roof panel installation. Do not install roof panels until panel substrate meets roof panel manufacturer's requirements.

1. Inspect framing that will support metal roof panel system to determine if support components are installed as indicated on approved shop drawings. Confirm presence of acceptable framing members at recommended spacing to match installation requirements of metal roof panels.

2. Panel Support Tolerances: Install metal roof panels on substrate within tolerances acceptable to metal roof panel system manufacturer:

a. Maximum out of plane deviation 1/4 inch in 20 feet (6 mm in 6.1 m).

b. Maximum deviation 1/2 inch (12.7 mm) over entire roof.

3.2 INSTALLATION

A. General: Install metal roof panel system in accordance with approved shop drawings and manufacturer's recommendations. Install metal roof panels in orientation, sizes, and locations indicated. Install metal roof panels in one-piece lengths from the ridge to eave unless otherwise indicated on approved shop drawings. Anchor panels and other components securely in place. Provide for thermal and structural movement.

B. Attach panels to metal framing using recommended clips, screws, fasteners, sealants, and adhesives indicated on approved shop drawings.

1. Fasten metal roof panels to supports with concealed clips at each joint at location, spacing, and with fasteners recommended by manufacturer. Install clips to supports with self-tapping fasteners approved by manufacturer.

2. Provide weatherproof escutcheons for pipe and conduit penetrating roof.

3. Dissimilar Materials: Where elements of metal wall panel system will come into contact with dissimilar materials, treat faces and edges in contact with dissimilar materials as recommended by manufacturer.

C. Joint Sealers: Install joint sealers where indicated and where required for weatherproof performance of metal roof panel assemblies.

1. Prepare joints and apply sealants per requirements of Division 07 Section "Joint Sealants."

3.3 ACCESSORY INSTALLATION

General: Install metal roof panel accessories with positive anchorage to building and weather tight mounting and provide for thermal expansion. Coordinate installation with flashings and other components.

1. Install related flashings and sheet metal trim per requirements of Division 07 Section "Sheet Metal Flashing and Trim."

2. Install components required for a complete metal roof panel assembly, including trim, copings, flashings, sealants, gaskets, fillers, closure strips, and similar items.

3. Comply with performance requirements, requirements of authorities having jurisdiction, and manufacturer's written installation instructions.

4. Provide concealed fasteners except where noted on approved shop drawings.

5. Set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently watertight and weather resistant.

3.4 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a service representative authorized by metal wall panel manufacturer to inspect completed installation. Submit written report. Correct deficiencies noted in report.

3.5 CLEANING AND PROTECTION

A. Remove temporary protective films when directed by Architect. Clean finished surfaces as recommended by metal roof panel manufacturer.

B. Replace damaged panels and accessories that cannot be repaired to the satisfaction of the Architect.

END OF SECTION

STANDING SEAM METAL ROOF PANELS

07 41 13-1