I presume that the chain will be partnered with large signs saying “Run away when venting!” or something similar, perhaps paired with alarms and flashing lights. Maybe coat the walking area deemed dangerous with a hatched, safety orange coating.
I can’t imagine that anyone will take a plastic yellow chain seriously enough to stay away. It may just be an invitation for people to cross into the danger area.
Good point, Ken. Since this is a roof area that is not open to the public, I am assuming that a pointed suggestion (yellow chain and sign) will be sufficient.
It seems to me that a plastic yellow chain wouldn’t hold up very long.
I know we weren’t told what is in the dangerous roof area, but my limited experience, one of the things I had to deal with was an MRI quench vent. I don’t recall what we did for that project.
But other roof quench vents I have seen have a railing around the area. Actually, other dangerous roof areas I have seen usually had a railing around the area. Sometimes safety yellow, but not always.
(MRI quench vents that open at ground level usually have fencing round it.)
I am used to specifying safety rails to put around roof hatches that often include a removable chain across the open end where you would access the roof hatch. These are usually yellow. The intent of the roof hatch safety railing is to prevent someone walking into an open roof hatch, specifically fire fighters on a smokey roof. I assume this is just a modular adaption based on the same kit of parts, possibly from the same manufacturer.