WAC 296-863-40040. Meet these requirements when using dock-boards (bridge plates)

(1) You must make sure dock-boards are not overloaded: (a) Make sure they are strong enough to carry the load imposed on them. (b) Make sure loads do not exceed the dock-board's rated capacity. (2) You must do the following when using dock-boards: (a) Drive slowly and carefully over dock-boards; (b) Properly secure dock-boards before driving on them. (3) You must make sure powered dock-boards meet the design and construction requirements of U.S. Department of Commerce Commercial Standard CS 202-56 (1961) "Industrial Lifts and Hinged Loading Ramps." (4) You must do the following when using portable dock-boards: (a) Use anchors or other devices that will prevent slipping; (b) Make sure they have handholds or other effective means for safe handling.