GUIDE SPECIFICATION – MAC 200SECTION 07610

SHEET METAL ROOFING

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes: Sheet metal roof ing panels, metal trim, accessories, fasteners, closures, and sealants.

[Specifier Note: Edit paragraph below to suit project requirements.]

B. Related Sections:

1. Section 05120 Structural Steel 2. Section 05310 Steel Deck 3. Section 05400 Cold-Formed Metal Framing 4. Section 06150 Wood Decking 5. Section 07210 Building Insulation 6. Section 07220 Roof and Deck Insulation 7. Section 07260 Vapor Retarders 8. Section 07410 Metal Roof and Wall Panels 9. Section 07620 Sheet Metal Flashing and Trim 10. Section 07920 Joint Sealants 11. Section 13120 Pre-engineered Structures

1.02 REFERENCES

A. General: Reference latest edition of applicable codes and standards.

B. American Society for Testing and Materials (ASTM):

1. ASTM A792/A792M - Standard Specif ication forSteel Sheet, 55% Aluminum-Zinc-Alloy-Coated by the Hot-Dip Process.

2. ASTM E1592 - Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference. 3. ASTM E1646 - Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference. 4. ASTM E1680 - Standard Test Method for

Rate of Air Leakage through Exterior Metal Roof Panel Systems

C. AISI Cold-Formed Steel Design Manual, AmericanIron and Steel Institute (AISI).

D. AISC Manual of Steel Construction, American Institute of Steel Construction (AISC).

E. UL Roof ing Materials Directory, Underwriters Laboratories, Inc. (UL).

1. UL Standard 580 - Tests for Uplift Resistance of Roof Assemblies.

[Specifier Note: Edit paragraphs below to suit project requirements.]

F. Building Codes and Design Standards:

1. ASCE-7, Minimum Design Loads for Buildings and Other Structures, American Society of Civil

Engineers (ASCE). 2. BOCA National Building Code, Building

Officials and Code Administrators, International (BOCA).

3. Uniform Building Code (UBC), International Conference of Building Code Off icials (ICBO).

4. Standard Building Code (SBC), Southern Building Code Congress International (SBCC).

5. International Building Code (IBC), International Code Council (ICC).

1.03 SYSTEM DESCRIPTION

A. Design Requirements:

1. Provide structural standing seam metal roof system with a min. 2" high "vertical" seam side joint, mechanically seamed. Factory applied sealant when requested.

2. Attach roof panels to support substrate with concealed anchor clips designed to allow for thermal movement of the panels. There shall be no exposed fasteners except at panel f ixing line and f lashing details or as indicated on approved panel drawings.

3. Roll-forming of the panels at the job site must be performed with manufacturer owned and relocatable industrial type roll-forming mill having a minimum of (10) stands to gradually shape the sheet metal. Installer owned or rented roll-formers are not acceptable. 4. Provide metal roof panel system which has been manufactured and installed to withstand specif ied design loads and maintains performance requirements without defects, damage, or failure.

GUIDE SPECIFICATION– MAC 200 SECTION 07610

SHEET METAL ROOFING

B. Performance Requirements:

[Specifier Note: Edit Paragraphs below to suit project requirements.]

1. Design Loads: Design loads shall be as specif ied below or as indicated on the contract drawings. a. The structural standing seam metal roof

system shall be designed to safely resist the positive and negative wind loads as specif ied below or as indicated on the contract drawings:

Roof Area (+) Wind (-) Wind Main Roof ____psf ____psf Ridge ____psf ____psf Eave ____psf ____psf Rake ____psf ____psf Corners ____psf ____psf

b. The structural standing seam metal roof system shall be designed to safely resist a ___psf roof live load.

2. Def lection Criteria: Roof panel def lection shall be limited to L/240 for positive loading.

3. Roof panels shall be free to move in response to the expansion and contraction forces resulting from a total temperature range of 40 degrees F during the life of the structure.

C. Performance Testing: Tests shall have been conducted or witnessed by a recognized independent laboratory or independent professional engineer.

1. Allowable uniform uplift load capacity shall be determined in accordance with ASTM E1592. a. The factor of safety against ultimate failure

of panel, batten, or clip shall be 1.65, with no increase due to wind.

b. Allowable uplift capacity for conditions of gauge, span, or loading other than those tested may be determined by interpolation of the test results. Extrapolation of conditions outside the range of the tests is not acceptable.

2. Roof panel system shall be tested for resistance to water penetration in accordance with ASTM E 1646, at a static pressure of 12.0 psf. There shall be no uncontrolled water penetration through the panel side joints.

3. Roof panel system shall be tested for

resistance to air leakage in accordance with ASTM E1680, at a static air pressure of 12.0 psf. Air inf iltration shall not exceed .02 cfm per sq ft of panel area.

4. Roof panel system shall be tested in accordance with UL Standard 580 and have a Class 90 rating.

5. Roof panels shall withstand a 300 lb concentrated load applied to mid-span between supports with no panel deformation,

rib buckling, or panel side joint separation which will adversely affect the weather-

tightness of the system.

1.04 SUBMITTALS

A. Product Data: Submit manufacturer's product data sheet and/or product design and install- ation manual.

B. Shop Drawings: Submit panel shop drawings consisting of design and erection drawings, f inish specif ications, and other data necessary to clearly describe design, materials, sizes, layouts, construction details, fasteners, and erection. Submit small scale layouts of panels and large scale details of edge conditions, joints, fastener and sealant placement, f lashings, penetrations and curbs, and special details. Distinction must be made between factory and f ield assembled work. Drawings must be approved and f ield verif i- cation of all dimensions must occur prior to fabrication.

GUIDE SPECIFICATION – MAC 200SECTION 07610

SHEET METAL ROOFING

statement of intended use. 4. Closure: One metal closure with foam insert. 5. Sealants: One (1) sample of each type, with a statement of intended use.

D. Warranties: Submit manufacturer's applicable sample warranties of products.

E. Quality Assurance Submittals:

1. Calculations: Submit structural design calculations certif ied by a registered professional engineer to verify load carrying capacity of the panel system.

2. Test Reports: Submit certif ied test reports showing that the roof system has been tested and conforms to the specif ied performance testing requirements.

3. Certif icates: a. A written statement from the manufacturer certifying conformance with the specif ied manufacturers qualif ications listed in article

b. A written statement from the installer certifying conformance with the specif ied installer qualif ications listed in article 1.05 QUALITY ASSURANCE.

1.05 QUALITY ASSURANCE

1.05 QUALITY ASSURANCE.

A. Qualif ications:

1. Manufacturers Qualif ications: The manu- facturer shall have had at least five (5) years in architectural metal roofing manufacturing.

The manufacturer shall have a permanent, stationary, indoor, production facility

2. Installer Qualif ications: a. The installer shall have had a minimum of f ive (5) years experience in the installation of metal roof ing. b. The installer shall be manufacturer approved.

B. Pre-installation Meeting: Conduct pre-installation meeting to verify project requirements, substrate conditions, manufacturer's installation instructions, and manufacturer's warranty requirements.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Material shall be delivered to the site in a dry and undamaged condition and unloaded per the manufacturers instructions. The installer shall inspect materials for damage and stains upon arrival at the site.

B. Storage: Materials shall be stored out of contact with the ground in weathertight coverings to keep them dry per the manufacturer's recommendations. Storage accommodations shall provide good air circulation and protection from surface staining.

C. Handling: Exercise care in unloading, storing, and handling of panels to prevent bending, warping, twisting, or surface damage. Follow manufacturer's recommendations for material handling.

1.07 WARRANTIES

A. Manufacturer's Warranties

1. Material Warranty: The manufacturer shall warrant that the material furnished will remain free from defects in material and workmanship for a period of ten (10) years from date of shipment.

2. Finish Warranty: The manufacturer shall warrant against fading, chalking, peeling, cracking, checking, chipping, or erosion to base metal of the roof panel paint f inish for a period of ten (10) years from date of shipment

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. The MAC 200 structural standing seam metal roof system as manufactured by Kloeckner Metals - Hawaii 91-104 Kalaeloa Blvd, Kapolei, HI 96707 B. Requests to use alternate systems must be submitted in writing at least ten (10) days prior to the bid date. Product data, samples, test reports, and required certif icates shall be included for product review and approval.

C. Being listed as a pre-qualified manufacturer does not release the manufacturer from providing complete and acceptable submittal requirements.

2. Anchor Clips: One (1) required. 3. Fasteners: Two (2) of each type with a

C. Samples:

1. Panel: One (1) required, full panel width by 12" long.

GUIDE SPECIFICATION – MAC 200 SECTION 07610

SHEET METAL ROOFING

2.02 MATERIALS

A. Metal Panels: MAC 200 structural standing seam panel as manufactured by Kloeckner Metals.

[Specif ier Note: Choose panel width, gauge, and pan type in section below.]

1. Fabricate metal panels from aluminum-zinc coated steel conforming to ASTM A792 Grade A with AZ55 coating. Thickness shall be minimum 24 gauge.

2. Panels shall be a min. of 12" wide with a 2" vertical seam height.

3. Panels shall [have longitudinal stiffening ribs in the pan to minimize "oil canning" effect, or be flat in the pan with no minor ribs].

B. Concealed Anchor Panel Clips: Fasten metal roof panels to support substrate with concealed anchor clips eliminating all through fastener penetrations.

1. Panel Clips shall be two piece f loating clip with a 18ga base and 22ga top. Clip shall be designed to accommodate thermal movement. Clip shall have a self-centering feature to assure movement capability in both directions.

2.03 FINISHES

A . Paint Finishes: Coating systems shall have been tested in accordance with ASTM standard test methods for factory color f inish. Exterior color shall be chosen from manufacturer's standard colors.

1. Polyvinylidene Fluoride (PVDF): Two-coat system consisting of a nominal 0.2 mil corrosion inhibitive primer on both sides with a 0.75 mil fluoropolymer exterior topcoat and 0.75 mil off-white backer finish.

2.04 ACCESSORIES

A. Fasteners: Use only high quality fasteners as recommended or approved by the roof system manufacturer. Follow fastener manufacturer's recommendations for fastener installation.

1. Screws: Self-drilling screws shall be min. #12 diameter. Self-tapping screws shall be min. #14 diameter. a. Exposed self-drilling and self-tapping screws shall be zinc plated with neoprene washer or be 410 series stainless steel with neoprene washer. All exposed fasteners shall be painted to match panel color. b. Concealed screws shall be zinc plated carbon steel with corrosion resistant coating or 400 series stainless steel as required.

2. Rivets: a. Structural bulbed rivets shall be min. 3/16" diameter, standard dome head, aluminum

rivet and mandrel, with a weathertight EPDM washer under the head. Min. 5/16" diameter, large f lange head, aluminum rivet and mandrel, with a weathertight EPDM washer under the head is required at panel endlaps.

b. Trim rivets shall be min. 5/32" diameter, stainless steel body and stem with open end or aluminum body and stem with closed end.

c. Rivets shall be painted to match panel color.

1. Pre-cut prof ile closure shall be cut from cross-linked, closed-cell foam.

2. All foam closures shall be protected and supported by a formed metal closure manufactured from the same material, color, and f inish as the roof ing.

B. Closures:

C. Sealants: Use only high quality sealants as recommended or approved by the roof system

manufacturer. Sealants must not contain oils, asbestos, or asphalts.

1. Non-Curing Butyl: One-part, non-skinning, non-drying, synthetic butyl elastomer. Used

for metal-to-metal sealing or bedding of panel and f lashing seams or joints.

GUIDE SPECIFICATION – MAC 200 SECTION 07610

SHEET METAL ROOFING

2. Butyl Tape (Webbed Mastic): Extruded polymeric butyl tape, non-skinning and not easily displaced under compression. Used

for critical sealing of panel ends, endlaps, penetrations, closures, and f lashings.

3. Urethane: One-part moisture curing, gun grade polyurethane sealant. Used for sealing

in all exposed conditions. Color to be coordinated with that of panel.

2.05 FLASHING

A. All f lashing shall be of the same material, gauge, f inish, and color as the panels unless otherwisenoted.

B. Flashing design shall conform to details submitted and approved by the Architect and, if required, the

ten (10) stands to gradually shape the sheetmetal. Installer-owned or rented roll formers arenot acceptable.

B. Roll-forming of panels at the job site must beperformed with manufacturer owned and operatedindustrial type rolling mill having a minumum of

panel manufacturer.

2.06 FABRICATION

A. Roof panel system components shall be fabricated in the factory for f ield assembly to the greatest

the factory for f ield assembly or fabricated on the C. Convex curved roof panels shall be fabricated in

job site with manufacturer owned and operated industrial type curving machine. Curved panels shall be stretch formed and crimp free.

PART 3 EXECUTION

3.01 EXAMINATION

A. The installer shall inspect the building to verify that the structure is ready for roof ing installation.

1. All supports shall be in place with all bracing and connections tightened before work

proceeds.

2. Field-check dimensions and check support alignment with a taut string or wire; panel misalignment may induce "oil canning" and potentially restrict panel movement.

a. Panel/purlin erection tolerances: * Maximum out-of-plane deviation shall be limited to +/-3/16" from control.

* Maximum deviation of 1/8" between adjacent purlins or L/500 which ever is less.

3. Do not proceed until unsatisfactory conditions are corrected.

3.02 INSTALLATION

A. Install metal roof ing system in accordance with approved erection drawings and manufacturer's installation instructions.

B. Install metal roof ing system so that it is weather-tight, without waves, warps, buckles, fastening

stress or distortion.

C. Hand-crimp at end of panels and any panel end lap(s) prior to seaming. Do not hand-crimp at each panel clip prior to seaming. Do not walk on

panels until panels are mechanically seamed together.

D. Seam panels together with electric powered seaming machine supplied by the manufacturer.

E. Protect installed panels from abuse by other trades. The general contractor shall be responsible for protecting the roof ing from wet cement, plaster, and paint operations. The

installer shall provide walk boards in heavy traff ic areas to prevent damage to the panels.

3.03 DAMAGED MATERIAL AND CLEANING

A. Replace panels and other components of work which have been damaged beyond repair.

B. To prevent rust staining, remove immediately from f inished surfaces any f ilings caused by drilling or cutting.

C. Wipe down each area after erection is complete for f inal acceptance.

extent possible.