Document ZaJ9mNawZk0mjx8MMbg9jjm7

F. HOLE COVERS 1. Use a. AH holes or openings through floors or decking at nil elevations must be pro vided with hole covers or barricades im mediately. Do not store material or equipment on a hole cover. 2. Placement a. Must have a sign reading: "WARN ING -- TEMPORARY COVER -- DO NOT REMOVE UNLESS AU THORIZED", or be otherwise identi fied. b. Must be cleated, wired, or otherwise secured so it cannot slip sideways or horizontally beyond the hole. c. Must extend adequately beyond edge of hole. 3. Material Three-quarter inch plywood may be used, provided one dimension of the opening is less than 18 inches; otherwise, 2-inch lum ber is required. G. SIGNS 1. Numerous warning and instruction-type signs are available. A r____ , a. Signs are to be placed on jgpfcSLiillll barricade stands, posts, or jXrjZzferj 111 other suitable locations J> b. They must be placed effectively, before work starts, and removed to proper storage when they are no longer needed. c. Signs must be legible. 28 DUP 0911233 H. MATERIAL HOISTS 1. To be operated only by "authorized op erator". 2. Passengers are not permitted -- for ma terial only. 3. Know the weight of material and capacity of elevator or hoist. Material must be se cured so it cannot shift, and must not extend beyond cage limits. 4. Follow instructions and use signal system posted at each landing. 5. Keep hands and bodies clear at all land ings and openings. I. WELDING AND BURNING 1. General a. Keep welding leads and burn ing hose clear of passageways. b. Inspect all leads, grounds, clamps, welding madiines, hoses, gauges, torches and cylinders each day before use. c. Be sure all fittings, couplings, and con nections are tight. d. Avoid breathing fumes. Use the exhaust system in the shop, a blower ,or a res pirator. e. No welding or burning is to be done on a closed vessel or tank, or on any vessel or tank which has not been decontami nated (cleaned). f. Before striking an arc or lighting a torch, check with your supervisor to see if a Welding and Burning Permit is required. This permit is required in all Plant Operating Areas. 29