(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.