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Portable circular power (Skil ) saw: <br /> * Teeth on the upper half of the saw blade must be <br /> permanently guarded . 1680(a) <br /> * Teeth on the lower half of the saw blade must be guarded <br /> with a telescopic or hinged guard . 1680(b) <br /> * Saw guards must not be blocked open to prevent guard from <br /> functioning . 1680(c) <br /> * The tip speed of a circular saw must not exceed 12 , 000 <br /> fpm unless approved and marked accordingly by the <br /> manufacturer . 4322 <br /> Portable compressors : <br /> * Compressors on wheels must be prevented from rolling . <br /> 1696(a) <br /> * Safety valves must be popped at least weekly . 1696(d) <br /> * The tank must be drained daily . 1696(c) <br /> * Air tanks require a permit issued by DOSH . 461 (a) <br /> Exception : Tanks smaller than 1 . 5 cubic feet with safety <br /> devices set to operate below 150 psi . <br /> Pneumatic Tools : <br /> Safety clips are required to prevent dies from being <br /> accidentally expelled from the barrel . 1695 <br /> Hot Work (Cutting, Heating, and Welding) : <br /> * Hazards to workers may come from exposure to flammable <br /> vapors , toxic gases , confined or restricted spaces . <br /> * Prior to any welding operation , the following controls <br /> must be established : <br /> * No welding is permitted in an explosive environment . <br /> 1805(c) <br /> * Remove or guard all combustible materials in the work <br /> area. 1805(a) <br /> * Provide suitable fire extinguishers , water containers , <br /> water hoses , sand , etc . in the work area. 1805(d) <br /> Page - 21 <br />