Safely covering a floor opening with a piece of plywood requires more than just laying down the material over the hole, or even nailing it down. Total on the job safety means a total job of eliminating a hazard. Half a job or inadequate or incomplete jobs of covering holes in the floor. Why did it happen? Although originally nailed down with 8d concrete nails, a small piece of plywood over the hole wasn’t large enough to overlay it adequately. Traffic over it sprung the plywood and loosened...
from Marek - Strength from Within https://ift.tt/3dvqXX5
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