FAQ#4 Why canﾒt I glue my own magnets to a piece of corrugated plastic to make my own temporary ingress barrier?

The temporary ingress barrier must be an approved or UL Classified device. Homemade Covers or Cardboard is not acceptable. OSHA defines ﾓacceptableﾔ as: ﾓAn installation or equipment is acceptable to the Assistant Secretary of Labor, and approved within the meaning of this Subpart S:

1. If it is accepted, or certified, or listed, or labeled, or otherwise determined to be safe by a nationally recognized testing laboratoryﾔ OSHA 1910.399, OHSA Letter of Interpretation