SURFACE PREPARATION

A. Prepare surfaces to receive expansion joint systems in accordance with manufacturer’s product data and approved shop drawings.

B. Repair all unsound substrates. Joint opening sidewalls interface areas must be clean and dry prior to installation.

C. Perform preparation in accordance with ASTM C 1193 “Standard Guide for Use of Joint Sealants” and manufacturer's printed instructions. D. Protect adjacent metal surfaces with masking tape.

3.3 INSTALLATION

A. Comply with manufacturer’s written instructions for storing, handling, and installing architectural joint assemblies and materials unless more

stringent requirements are indicated.

B. Metal Frames: Perform cutting, drilling, and fitting required to install joint systems.

1. Install in true alignment and proper relationship to joints and adjoining finished surfaces measured from established lines and levels.

2. Adjust for differences between actual structural gap and nominal design gap due to ambient temperature at time of installation. Notify Engineer where discrepancies occur that will affect proper joint installation and performance.

3. Cut and fit ends to accommodate thermal expansion and contraction of metal without buckling of frames

.

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5. Heavy-Duty Systems: Repair or grout blockout as required for continuous frame support and to bring frame to proper level. Shimming is not allowed.

6. Locate anchors at interval recommended by manufacturer, but not less than 3 inches from each end and not more than 24 inches on center.

C. Seals In Metal Frames: Install elastomeric seals and membranes in frames to comply with manufacturer’s written instructions. Install with minimum number of end joints.

1. Provide in continuous lengths for straight sections.

2. Seal transitions according to manufacturer’s written instructions. Vulcanize or heat-weld field-spliced joints as recommended by manufacturer.

3. Installation: Mechanically lock seals into frames or adhere to frames with adhesive or pressure-sensitive tape as recommended by manufacturer.

D. Compression Seals: Apply adhesives or lubricant adhesive as

recommended by manufacturer to both frame interfaces before installing compression seals.

E. Epoxy Bonded Seals: Pressurize seal for time period and to pressure recommended by manufacturer. Do not over pressurize..

F. Terminate exposed ends of joint assemblies with field- or factory- fabricated termination devices.

G. Water barrier: Provide water barrier at exterior joints and where called for on drawings. Provide drainage fittings at a maximum of 50 feet or where indicated.

3.4 CLEANING

A. Clean adjacent soiled surfaces. 3.5 PROTECTION OF FINISHED WORK

A. Do not remove protective covering until finish work in adjacent areas is complete. When protective covering is removed, clean exposed metal surfaces to comply with manufacturer’s written instructions.

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B. Protect the installation from damage by work or other sections. Where necessary due to heavy construction traffic, remove and properly store cover plates or seals and install temporary protection over joints. Reinstall cover plates or seals prior to Substantial Completion of the work.

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UNIT SKYLIGHTS 08 62 00

AC Transit IFB # 2015-1309 Section 08 62 00 Reroofing of Transportation Building - Div 2 - Emeryville Bus Yard

page 1 of 8 SECTION 08 62 00 UNIT SKYLIGHTS PART 1 GENERAL 1.1 SUMMARY A. Section Includes:

1. 2-3/4 inch factory prefabricated structural insulated transluscent sandwich panels for replacement of octagonal skylight.

2. Aluminum installation system.

3. Aluminum flashing attached to skylight. B. Related Sections:

1. Section 06 10 00 – Rough Carpentry (wood curbs where required) 2. Section 07 53 10 – Single Ply Roofing System (roofing system

against existing skylight curbs)

3. Section 07 90 00 – Sealants (for sealing around skylight) 1.2 SUBMITTALS

A. Section 01300 – Submittals

B. Product Data: Include structural, thermal, and daylighting performance values material descriptions, profiles and finishes of skylight components. C. Shop Drawings: Indicate configurations, dimensions, locations, fastening

methods, and installation details.

D. Manufacturer’s Installation Instructions: Submit special procedures, and perimeter conditions requiring special attention.

E. Manufacturer’s color charts showing the full range of colors available for factory finished aluminum.

1. Samples of selected aluminum and exterior finish panels for color verification.

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b. Factory finish aluminum: 5 inch long section

F. Submit Installer Certificate, signed by installer, certifying compliance with project qualification requirements.

G. Submit product reports from a qualified independent testing agency indicating each type and class of panel system complies with the project performance requirements, based on comprehensive testing of current products.

1. Reports required are:

a. International Code Council Evaluation Report

b. Flame Spread and Smoke Developed (UL 723) – Submit UL Card c. Burn Extent (ASTM D 635)

d. Color Difference (ASTM D 2244) e. Impact Strength (UL 972)

f. Bond Tensile Strength (ASTM C 297 after aging by ASTM D 1037) g. Bond Shear Strength (ASTM D 1002)

h. Beam Bending Strength (ASTM E 72) i. Fall Through Resistance (ASTM E 661) j. Insulation U-Factor (NFRC 100)

k. NFRC System U-Factor Certification (NFRC 700) l. Solar Heat Gain Coefficient (NFRC or Calculations) m. Condensation Resistance Factor (AAMA 1503) n. Air Leakage (ASTM E 283)

o. Structural Performance (ASTM E 330) p. Water Penetration (ASTM E 331)

q. Class A Roof Covering Burning Brand (ASTM E 108)

r. Engineered calculations for skylight weight and thrust force to be resisted by connectors at each corner of the unit.

1.3 PERFORMANCE REQUIREMENTS

A. Allow for expansion and contraction within system components caused by a cycling surface temperature range of 170 °F without causing detrimental effects to system or components.

B. Withstand live loads as calculated in accordance with applicable code to minimum positive design pressure of 40 psf and suction negative design pressure of 40 psf. Wind loads of 60 psf.

C. Provide glazing system with minimum visible light transmittance of 50% of clear skylights, maximum ultraviolet transmission of 2.0 percent and shading coefficient of 0.68 for medium white acrylic skylights.

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page 3 of 8

D. Standard Skylight system shall have less than 0.01 cfm/sf air leakage by ASTM E 283 at 6.24PSF ( 50 mph) and no water penetration by ASTM E 331 at 15 PSF; and structural testing by ASTM E 330.