Stupid Question About Hazmat Placards

So I depart my shipper , and she gives me 5 hazmat placards. I install them on the trailer, in the provided holders on the trailer.

This morning, I wake up and find that 2 are missing. At first, I thought some low life had stolen them. I purchase 2 more, and head on my way.

When I get to the rest area, they are gone.

Luckily I was just down the road from my delivery.

So. ... the vinyl hazmat placards. .... I'm guessing it's better to actually stick them to the trailer, than place them in the holder?

Any suggestions?

I pull a tanker and sometimes I have to switch placards regularly. My placard holders usually lock the placard in place and won't fly out, but if I feel the clamp isn't strong enough, I'll use clear tape around the inside edges for added support. Remember that clear tape is the best, so DOT can't claim that part of the placard is being covered.

I pull a tanker and sometimes I have to switch placards regularly. My placard holders usually lock the placard in place and won't fly out, but if I feel the clamp isn't strong enough, I'll use clear tape around the inside edges for added support. Remember that clear tape is the best, so DOT can't claim that part of the placard is being covered.

Thanks. I made suse to check the clamp, and they were tight. But from now on I'll take your advice and apply some clear packing tape around the edges.

We'll use a wire coat hanger. This is what we do when we need stickers for bulk placards. You bend the coat hanger into a diamond shape like the placard bracket. First, slide the sticker into the placard bracket, and then insert the coat hanger into the placard bracket on top of the sticker. It will hold it in place - never had one fly out or blow out when using the coat hanger trick.