crawl boards

crawl boards

Boards placed on roofing that are intended to protect it against heavy foot traffic.
References in periodicals archive ?
KNEE PADS DUST MASK A BOILER SUIT (PREFERABLY DISPOSABLE PAPER) REMEMBER: USE CRAWL BOARDS INSTEAD OF STANDING ON THE LOFT JOISTS OR CEILING FLOORS GLOVES
The team were not wearing harnesses or ropes or using crawl boards to traverse the fragile roof.