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SKYLIGHTS & LIGHT CONTROL LOUVERS Section 08621 15-1207 As a standard of construction and operation, skylights shall be equivalent to Sunoptics Model 800MD (tested per report ESR -3557), double hip shape, and integral light control louvers; Sunoptics Light Control Module as manufactured by Sunoptics Prismatic Skylights, 6350 27th Street, Sacramento, CA 95822, (916) 395-4700, with the following characteristics: a. Skylights shall be assembled and glazed ready for installation. b. Skylight frames shall be fabricated with ASTM B221 6063-T5 aluminum extrusions. Skylight frame finish is to be mill, have an insulated thermally broken frame, and shall have integral condensate and weepage gutters which drain interior to the outside. Mount to curb with tamper resistant screws. C. Weather Sweep: provided manufacturer's weather sweep attached to skylight frame. d. Skylights shall be glazed with a SR60 clear prismatic acrylic outer lens, and SR25 white prismatic acrylic inner lenses. The visible light transmittance to be 0.68, with a shading heat gain coefficient of 0.42, and a maximum U -Value of 0.74. Acrylic glazing to be CC -2 rated. e. The overall skylight efficacy, exclusive of the well loss and louvers, shall be 1.1. f. Safety Security Guard: Manufacturer's 3/16" wire mesh at 4" o.c. in each direction. Provide at all skylights. g. Curb: Manufacturer's fabricated curb, Model ARC -3, double wall 18 gauge galvanized steel, with 1 Y2" fiberglass insulation and 2 x 2 pressure treated wood nailer for mounting skylight. h. Exterior drip/counter flashing, and drainage ports shall be protected from weather and air -borne debris. All corners of curb and retaining frames shall be mitered and full penetration welded. Curb frame shall be predrilled for anchorage to roof framing. All mechanical fasteners shall be either aluminum alloy 2024-T4, Type 302 non-magnetic stainless steel or plated steel. 2.02 LIGHT CONTROL LOUVERS A. Light Control Louvers shall be Sunoptics Model 900 motorized as manufactured by Sunoptics Skylights, 6350 27th Street, Sacramento, CA 95822, (916) 395-4700. B. Louvers shall be factory assembled, ready for installation. C. Louver frame and blades shall be fabricated from 6063-T5 aluminum, finish to be baked on enamel, white in color. D. Louver frames shall be mechanically joined at the corners. Blades shall be 6 in. on center, rotating on a 5/8 in. rigid PVC bearing. Aluminum end plates shall be fastened to the ends of each blade and act as thrust caps against the PVC bearing. End plates shall be attached to an aluminum bar on one side for gang operation. E. Louvers shall be electrically operated using Sunoptics standard synchronous 115VAC motor unit. The motor unit shall be integral to the louver assembly and shall be equipped with limit switches at full open and closed positions. 1. Louvers shall also utilize photo -cell control to limit daylight levels to desired set point. Provide the following components as manufactured by Sensor Switch, Inc., supplied by CJS Lighting (916) 787-6632, or accepted equal: n