PDFWAC 296-800-31065
Maintain exit routes during construction and repair.
(1) You must have enough exit routes that comply with these rules before letting your employees occupy a workplace under new construction.
(2) You must make sure that employees do not occupy an existing workplace unless:
(a) All exits and existing fire protection are maintained; or
(b) Alternate fire protection is provided that ensures an equivalent level of safety.
(3) You must make sure that flammable or explosive materials used during construction or repair do not expose employees to additional hazards or prevent emergency escape.