Orange County NC Website
Browse       Search
OC DSS -Hillsborough Commons Skylight Replacement Smith Sinnett / 2020054 <br />Hillsborough, NC Orange County <br /> <br />PLASTIC GLAZED SKYLIGHTS 03-2020 08620 curb mounted <br /> 3 <br /> <br />B. Substitutions: Manufactures shall not be considered without prior approval in writing no later than ten (10) <br />calendar days prior to bid. Substitute manufacturers must have been in the custom skylight business for not <br />less than a period of 15 years and must submit to the Architect the following: <br /> <br />1. List of similar projects successfully completed within the last five years. <br />2. Proof of financial capability. <br />3. Complete details of proposed skylight. <br />4. Complete specifications for Architect’s review. <br /> <br />2.2 MATERIALS <br /> <br />A. Curb Frame: Extruded aluminum alloy 6063-T5 (min.) ASTM B 221 (ASTM B 221 M) with minimum <br />effective thickness of .090 inches. Provide integral condensation gutter system with corners fully welded <br />for waterproof quality. Curb frame to have glass fiber reinforced polymer thermal break. <br />1. Poured and de-bridged polyurethane thermal breaks are not acceptable <br />B. Retainer Frame: Extruded aluminum alloy 6063-T5 (min). ASTM B 221 (ASTM B 221 M) with <br />minimum effective thickness of 0.60 inches. <br />C. Pressure Caps: Extruded aluminum alloy 6063-T5 (min). ASTM B 221 (ASTM B 221 M) with minimum <br />effective thickness of 0.100 inches. <br />D. Plastic Sheets: Monolithic, sheets with good weather and impact resistant. <br />1. Acrylic: (Continuous cast acrylic) or (impact modified continuous cast acrylic) sheet, thermo- <br />formable, and cold formable, Category C-2 or CC-2 Type UVA (formulated with ultraviolet <br />absorber), with Finish 1 (smooth or polished), unless otherwise indicated. <br />a. Extruded acrylic sheet is not acceptable. <br />2. Polycarbonate: Category C-1 or CC1 weatherable monolithic sheet coated for UV protection. <br />E. Thermal Break: Glass fiber reinforced polymer separating interior metal framing from materials exposed <br />to outside temperature. <br />1. Poured and de-bridged polyurethane thermal breaks are not acceptable. <br />F. Fasteners: Same metal as metals being fastened, or nonmagnetic stainless steel or other non-corrosive <br />metal as recommended by Wasco Products, Inc. <br />G. Bituminous Coating: SSPC-Paint 12, solvent-type, bituminous mastic, nominally free of sulfur and <br />containing no asbestos fibers, compounded for 15-mil (0.4 mm) dry film thickness per coating. <br /> <br /> <br /> <br />2.3 PLASTIC BARREL VAULT SKYLIGHT <br /> <br />A. General: Factory-assembled or knocked down, curb-mounted unit consisting of cast acrylic glazing, <br />gasketing, inner frame designed to mount on separate curb, and self-contained flashing. <br />1. Products: Provide model CBSD or equal meeting the requirements of this section. <br />B. Curb: Minimum 3 ½” wide field built (Existing). <br />C. Condensation Control: Fabricate skylight units with integral internal gutters and weeps to collect and <br />dispose of condensation beyond the outside of support curb. <br />D. Shape and Size: As indicated on project drawings. <br />E. Glazing: Outer - impact modified continuous cast acrylic. White. Extruded acrylic not acceptable. <br />F. Glazing: Inner - Continuous cast acrylic. Clear. Extruded acrylic not acceptable. <br /> <br />2.4 FALL PROTECTION SAFETY SCREENS <br /> <br />A. Screen: Welded steel wire mesh, 4” x 4” spacing, wire diameter - .188” min. hot dipped galvanized finish <br />on carbon steel or unfinished stainless steel. <br />B. Frame: Extruded aluminum alloy 6063-T5 (min). ASTM B 221 (ASTM B 221 M) with minimum <br />effective thickness of 0.090 inch (2.2 mm). <br />a. Frame includes a pocket for the edges of the screen material, and a downward leg for attachment <br />to any vertical surface of a skylight retainer or frame. <br />DocuSign Envelope ID: 51195338-6F17-4D2B-B990-4A82329E7F4E