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ROLLER SHADES Section 12494 15-1207 Contact: Robert Knoll, O: 925-732.9010, M: 925.605.9068, Robert. knoll(a).mechosystems. com. B. General: 1. Provide shade hardware allowing for the removal of shade roller tube from brackets without removing hardware from opening and without requiring end or center supports to be removed. 2. Provide shade hardware that allows for removal and re -mounting of the shade bands without having to remove the shade tube, drive or operating support brackets. 3. Use only Delrin engineered plastics by DuPont, or accepted equal, for all plastic components of shade hardware. Styrene based plastics, and /or polyester, or reinforced polyester will not be acceptable. C. Manual Operated Chain Drive Hardware and Brackets: 1. Hardware: Capable for installation of a removable fascia, for both regular and/or reverse roll, including fascias mounted continuously across two or more shade bands, which shall be installed without exposed fastening devices of any kind, universal, regular and offset drive capacity, allowing drive chain to fall at front, rear or non -offset for all shade drive end brackets; constructed of minimum 1/8 -inch (3.18 mm) thick plated steel or heavier as required to support 150 percent of the full weight of each shade. Universal offset shall be adjustable for future change. 2. Operator: Single chain operator capable of operation of multiple shade bands, subject to manufacturer's design criteria, providing smooth operation when the axis is offset a maximum of 6 degrees on each side of the plane perpendicular to the radial line of the curve, for a 12 degrees total offset. Connectors shall be offset to assure alignment from the first to the last shade band. 3. Drive mechanism: Positive mechanical engagement to shade roller tube. Friction fit connectors for drive mechanism connection to shade roller tube are not acceptable 4. Drive Bracket / Brake Assembly: Model M5 a. Fully integrated with all accessories, including, but not limited to: fascia, room darkening side / sill channels, center supports and connectors for multi -banded shades. b. Drive sprocket and brake assembly shall rotate and be supported on a welded 3/8 inch steel pin. C. The brake shall be an over -running clutch design which disengages to 90 percent during the raising and lowering of a shade. The brake shall withstand a pull force of 50 lbs. in the stopped position. d. The braking mechanism shall be applied to an oil -impregnated hub on to which the brake system is mounted. The oil impregnated hub design includes an articulated brake assembly, which assures a smooth, non -jerky operation in raising and lowering the shades. The assembly shall be permanently lubricated. Products that require externally applied lubrication and or not permanently lubricated are not acceptable. e. The assembly shall be fully mounted on the steel support bracket, and fully independent of the shade tube assembly, which may be removed and reinstalled without effecting the roller shade limit adjustments. 5. Drive Chain: #10 qualified stainless steel chain rated to 90 Ib. minimum breaking strength, with Spring -Loaded Tension Chain Retainer. Nickel plate chain will not be 3