WAC 296-878-13005. Inspect the area to be cleaned

(1) You must inspect the building before cleaning to make sure there are no areas that can damage worker fall protection equipment and window-cleaning equipment. Inspect: (a) Sharp edges of parapets; (b) Window frames; (c) Open projected windows; (d) Cornices; (e) Overhangs; (f) Any other areas that may abrade, sever, weaken, or damage the equipment. (2) You must make sure all working surfaces are safe and free from hazards such as: (a) Grease; (b) Oil; (c) Other slippery substances.