Sample Ultra Seam US-200 Specification (revised 7/16/99)
PART I - GENERAL
1.01 - DESCRIPTION OF WORK:
A. Work under this section includes furnishing and installing all materials and labor required for the new roof system. This includes but is not limited to the following: roof panels, clips, closures, flashing, vents, sealants, and other items required for a complete metal roof system.
1.02 - RELATED WORK SPECIFIED ELSEWHERE:
07600 - Sheet Metal
07900 - Sealants
1.03 - QUALITY ASSURANCE:
A. Manufacturer: Obtain primary materials of each type required from a single manufacturer, to greatest extent possible. Provide secondary materials only as recommended by manufacturer of primary materials.
B. Installer shall be authorized by the roofing manufacturer to install this product. Installer shall have a minimum of five (5) years and five (5) jobs of successful experience with metal roofing systems similar to the one specified here, on projects of similar size and scope.
C. Metal roofing manufacturer's technical engineering department shall review and approve shop drawings prior to manufacture of metal roofing.
D. Manufacturer's representative: a representative of the manufacturer, who is familiar with the design of the roof system supplied, and experienced in the erection of roof systems similar in size to the one required under this contract, shall be present at the job site during installation to assure that the roof system meets the specified requirements. The manufacturer's representative shall be either an employee of the manufacturer with at least five years experience in installing the roof system or an employee of an independent installer that is certified by the manufacturer to have five years of experience installing similar roof systems.
E. Performance Criteria:
1. Provide wind uplift resistance in accordance with the 1994 Uniform Building Code.
2. Structural capacity of metal roofing system shall be determined in accordance with ASTM E 1592, the Standard Test Method for Structural Performance of Sheet Metal Roofing and Siding Systems by Uniform Static Air Pressure Difference. A minimum of two tested spans is required in order to interpolate allowable load data between tested spans. Extrapolation of data outside the tested spans is not allowed.
3. Provide a design analysis signed by a registered Professional Engineer, confirming that the structural capacity of the metal roofing system as determined in accordance with ASTM E 1592 is adequate to resist the above design loads in accordance with the 1994 UBC. Analysis should include calculations verifying the design loads, the uplift pressures and how those loads affect the various areas of the roof. Provide a roof plan with the perimeter areas of discontinuity clearly shown and distinguished from the typical field roof elements.
4. Air Infiltration: Panels shall meet the following standard when tested in accordance with ASTM E 1680-95: With Sidelap Sealant .0127 SCFM/sq ft @ 12 PSF.
5. Water Penetration: Panel shall meet the following standard when tested in accordance with ASTM E 1646-95: With Sidelap Sealant, no leakage @ 12 PSF.
6. Thermal Movement: All roof panels shall be secured to allow
thermal movement. All flashing details shall also make provisions to allow for thermal movement.
1.04 - WARRANTY:
A. Manufacturer's Product Warranty.
1. Warrant for 20 years, following project delivery date, that panels will be free from defects, and that panels if properly installed will not rupture, fail structurally or perforate.
B. Installer's Warranty.
1. Warrant panels, flashing, sealants, fasteners, and accessories against defective workmanship, and to remain watertight and weatherproof with normal usage for two (2) years.
1.05 - SUBMITTALS
A. Submit shop drawings approved by the manufacturer's technical engineering department. Drawings shall be thorough and show all typical and special conditions including flashing, materials and thicknesses (gauges), all dimensions, all anchoring methods, sealant locations, sealant tape locations, and provisions for thermal movement and lines of fixity.
B. Submit technical data, including installation instructions and recommendations for the following:
1. Metal Roofing System
2. Sealant Tape
3. Joint Sealing
C. Calculations: Submit design analysis in accordance with 1.03 E.3.
D. Test report: Submit copies of ASTM E 1592 structural capacity tests.
E. Submit documentation showing that the installer is authorized by the roofing manufacturer to install the roof product and that the installer has a minimum of five(5) years experience and five (5) jobs of similar scope to this job that were successfully completed.
F. Samples:
1. Submit three (3) samples of each type of fastener to be used.
2. Submit sample of closed cell foam closure.
3. Submit one (1) sample of each standard manufactured accessory.
4. Submit a sample of the roofing panel to be used showing the proposed profile.
5. Submit color sample(s).
1.06 - PRODUCT DELIVERY, STORAGE AND HANDLING:
A. Keep coils and/or panels dry. If covered with plastic, provide ventilation.
B. Protect against damage and discoloration. Handle panels with non-marring slings. Do not bend panels. Store panels with one end elevated for drainage. Protect panels against standing water and condensation between adjacent surfaces. If panels become wet, immediately separate sheets, wipe dry with clean cloth, and separate sheets for air-drying.
PART II - PRODUCTS
2.01 - STEEL OR ALUMINUM ROOFING:
A. Preformed roof panels with field mechanically seamed and locked ribs, 2 inches high and 16 inches wide for steel panels or 12 inches wide for aluminum panels. Provide panels in full, unbroken, continuous lengths. Panel end laps are not permitted. Design is based on Ultra Seam
US-200 as manufactured by Architectural Metal Products, Inc.
B. 1. STEEL- Base metal shall be 24 gauge steel conforming to ASTM A-653, Grade D with minimum yield strength of 50,000 PSI. Steel shall have a "Zincalume" or "Galvalume" protective coating conforming to ASTM A-792-83 consisting of 45% zinc by weight and 55% aluminum alloy by weight.
2. ALUMINUM - Base metal shall be .040 inch thick, alloy 3004 H-34 Alclad aluminum, ASTM B-209.
C. Roof flashing: Flashing shall be from the same material, gauge, and finish as the roof panel. Temper of the flashing material may be reduced to facilitate fabrication.
D. Pipe Flashing: Provide "Dektite" pipe flashing for metal roof penetrations as manufactured by Buildex, or equal. Flashing shall have the widest temperature range available. Other flashing shall be as detailed and required and shall match panels.
E. Concealed Clips: Concealed clips shall be designed to meet the wind uplift requirements. Clips will provide for thermal expansion and contraction and will not abrade the panel against the clips, substrate, or fasteners. Clips are to be made from either stainless steel for aluminum applications or galvanized steel for steel applications.
F. Clip Fasteners: Clip fasteners shall be either stainless steel for aluminum panel or galvanized steel for steel panel.
G. Fasteners: All exposed fasteners are to be either stainless steel or galvanized hex head with neoprene washers painted to match the roofing color.
H. End Closures: Provide waterproof, laminated, semi-rigid, cross-linked, polyethylene closed cell foam or neoprene. Closures shall tightly fit panel configuration.
2.02 - FACTORY COLOR FINISH:
A. Roof panels shall have a factory color finish on the exposed side. The exterior finish shall consist of a 70 percent polyvinylidene fluoride (Kynar 500) coating. Color shall be chosen from manufacturer's standard. The dry film thickness of the exterior coating shall be not less than 0.8 mil over a primer coat with a dry film thickness of 0.5 mil. The exterior color finish shall meet the test requirements specified below. The manufacturer shall have conducted tests on previously manufactured sheets of the same type and finish as proposed for the project. Standard washcoat reverse.
B. Salt Spray Test: A sample of the sheets shall withstand a salt spray test for a minimum of 1000 hours in accordance with ASTM B 117, including the scribe requirement in the test. Immediately upon removal of the panel from the test, the coating shall receive a rating of 10, no blistering, as determined by ASTM D 714; and rating of 7, 1/16-inch failure at scribe, as determined by ASTM D 1654.
C. Formability Test: When subjected to a 180-degree bend over a 1/8-inch or 3t whichever is greater diameter mandrel in accordance with ASTM D 522, exterior coating film shall show no evidence of fracturing to the naked eye.
D. Accelerated Weathering, Chalking Resistance, and Color Change: A sample of the sheets shall withstand a weathering test of a minimum of 2000 hours in accordance with ASTM G23 using a Type D apparatus, without cracking, peeling, blistering, loss of adhesion of the protective coating, or corrosion of the base metal. Protective coating that can be readily removed from the base metal with tape in accordance with ASTM D 3359, Test Method B, shall be considered as an area indicating loss of adhesion. After the 2000-hour weatherometer test, exterior coating shall not chalk greater than No. 8 rating in accordance with ASTM D4214 test procedures. After the 2000-hour weatherometer test, exterior coating color change shall not exceed 2 NBS units in accordance with ASTM D2244.
E. Humidity Test: When subjected to a humidity cabinet test in accordance with ASTM D 2247 for 1000 hours, a scored panel shall show no signs of blistering, cracking, creepage or corrosion.
F. Impact Resistance: Factory-painted sheet shall withstand direct and reverse impact in accordance with ASTM D 2794 equal to 1.5 times metal thickness in mils, express in inch-pounds, with no loss of adhesion.
G. Abrasion Resistance Test: When subjected to the falling sand test in accordance with ASTM D 968 the coating system shall withstand a minimum of 60 liters of sand before the appearance of the base metal.
H. Specular Gloss: Finished surfaces shall have a specular gloss rating of 30-35 or less at an angle of 60 degrees when measured in accordance with ASTM D 523.
I. Pollution Resistance: Coating shall show no visual effects when immersion tested in a 10 percent hydrochloric acid solution for 24 hours in accordance with ASTM D 1308.
PART III - EXECUTION
3.01 - INSPECTION
A. Examine areas to receive panels and verify that:
1. Dimensions are correct.
2. Adjacent or adjoining surfaces are clean, dry, reasonably smooth and free of defects.
3. There are no conditions that will adversely affect installation.
B. Do not begin installation until unsatisfactory conditions have been corrected.
3.02 - INSTALLATION:
A. General Requirements: Preformed metal roofing shall be installed in accordance with manufacturer's written specifications.
B. Roof panels shall run continuous with no horizontal joints.
C. Roof panels shall be attached to structure by means of concealed anchorage system. No through penetrations or fasteners of roofing panels will be permitted except at eave, and for approved flashing attachments. Roofing anchor clips shall be spaced to meet design load requirements and approved engineering calculations.
D. Locate concealed clips and fasteners in accordance with manufacturer's requirements and based on a registered structural engineer's recommendations for this specific project as specified for wind conditions.
E. Field Forming of Panels: Roofing panels may be formed from factory-color-finished steel coils at the project site, in which case the same care and quality control measures that are taken in shop forming of roofing panels shall be observed.
F. Secure panels without warp or deflection. Insure proper engagement of anchor clips with each panel rib before positioning next panel.
G. Allowable erection tolerance: maximum alignment variation at 1/4 inch in 40 feet.
H. Flashing: Details in installation which are not indicated shall be in accordance with NRCA Construction Details, SMACNA Architectural Sheet Metal Manual, AA Specifications for Sheet Metal Work, panel manufacturer's printed instructions and details and the approved shop drawings. Installation shall allow for expansion and contraction of flashing.
I. Install work watertight, plumb, level and true with components securely attached and in accordance with manufacturer's recommendations.
J. Treat any contacting surfaces of dissimilar materials to prevent electrolytic corrosion.
K. Workmen who will be walking on roofing panels shall wear clean, soft-soled shoes that will not pick up stones or other abrasive material which could damage panel surfaces.
L. Touch-Up: Touch-up damaged paint surfaces in accordance with manufacturers instructions.
M. Cleaning and Repairing: At completion of each day's work and at work completion, sweep panels and flashing clean. Do not allow fasteners, cuttings, filings or scraps to accumulate on finish surfaces.
***END OF SECTION***
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