WAC 296-307-28052. Wood guards

Wood guards may be used where fumes would cause rapid deterioration of metal guards and outdoors where extreme cold or extreme heat make metal guards and railings undesirable. (1) Wood must be sound, tough, and without loose knots. (2) Guards must be made of planed lumber not less than 1-inch rough board measure, with rounded edges and corners. (3) Wood guards must be securely fastened together with wood screws, hardwood dowel pins, bolts, or rivets. (4) Wood guards must be equal in strength and rigidity to metal guards specified in WAC 296-307-28050 and Table P-1. Note: Requirements for the construction of standard wood railings are in WAC 296-307-28060 .