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METAL DOORS & FRAMES Section 08100 15-1207 protect such materials and work. E. Assembled frames shall be stored in a vertical position, five units maximum in a stack. F. Do not use non -vented plastic or canvas shelters, which create a humidity chamber and promotes rusting. Remove wet wrapping or packing from doors and frames immediately. Provide 1/4 inch space between doors and between frames to promote air circulation. 1.09 PROJECT CONDITIONS A. Verify that conditions are correct and proper for installation of products. Obtain accurate job dimensions of openings including floor elevations. Ascertain correct locations and arrangements of anchorage required to accommodate work. PART 2 - PRODUCTS 2.01 ACCEPTABLE MANUFACTURERS A. Titan Metal Products of Sacramento, CA; Forderer Cornice works of Hayward, CA; Door Components, Inc., Fontana, CA; or accepted equal. 2.02 HOLLOW METAL DOORS A. General: Shop fabricate to required sizes and shapes. Form and weld with straight arises, edges and corners; surfaces free from warp, wave, buckle, dents or other defects. Use of excessive plastic filler to conceal manufacturing defects is not acceptable. Construct per HMMA specifications and standards (latest edition) in addition to requirements as indicated in these specifications. 1. Door faces and core reinforcing shall be formed from A60 Galvanealled Sheet Steel, conforming to ASTM A653-96. B. Fabrication: Flush Doors; Type II, heavy duty, 1-3/4 inches (44 mm) thick, 18 ga. (0.042 in., 1.0 mm) minimum thickness steel face sheets at interior doors and 16 ga. (0.053 in., 1.3 mm) minimum thickness zinc -coated sheets at exterior doors with 18 ga. (0.042 in., 1.0 mm) interlocking steel stiffeners at 6" o.c. +/ /z" vertically. Faces shall be free of seams or joints. Top and bottom edges to be closed with a continuous steel channel, not less 16 ga. (0,053 in., 1.3 mm), spot welded to both face sheets. Doors to have an additional flush closing channel at their top edges. Openings to be provided in the bottom closure of exterior doors to permit the escape of entrapped moisture. Seal top edge to make waterproof using plastic filler sanded flush. Vertical edges shall be beveled 1/8" in 2". C. Reinforcement: Stiffen as recommended by HMMA or using any method conforming with ANSI A151.1 criteria for determining twist test strength or as indicated by these specifications. Exposed spot welding is not acceptable. D. Insulation: Door manufacturer's standard sound deadening material on door interior. Sound deadening material in labeled doors shall conform to UL or Warnock Hersey requirements. Thermal insulation properties to have a U factor of 0.263 (R value of 3.8) for polystyrene core and U factor of 0.09 (R value of 11.1) for polyurethane core at exterior doors. 3