PDFWAC 296-878-12005
Make sure building surfaces and fixtures are safe to use.
You must make sure building surfaces and fixtures are safe to be used before you begin the window-cleaning operation. This includes:
(1) Guardrails, parapets, cornices and other building surfaces used to support suspended loads;
(2) Permanently installed fixtures used as anchorages and tiebacks;
(3) Window-cleaning equipment support systems permanently dedicated to the building.