Locks On Trailer Doors

My understanding is that van loads and reefer loads will be sealed at some point when they have been loaded. I have two questions:
1) are you required to place a lock on the doors after that seal goes on?

2) are tank trailer outlets sealed or locked?

Trailer doors have a numerically coded seal on them - to ensure to the receiver that the load wasn't tampered with. These seals don't SECURE the doors - they are easily cut or broken. Most companies REQUIRE an actual lock on the door also - and even if they didn't - a lock certainly discourages thieves from trying to pilfer your load.

I can't speak to tanker loads - but I would assume that some kind of seal or lock is (or should be) applied - for the same reasons - and to keep some joker/idiot from opening your valve(s) up for laughs (which of course would NOT BE FUNNY).

Rick

What I generally do is if the trip is short enough that I can make it without stopping, I don't bother with my lock (except for HVL's). Any multi-day trips I lock up immediately just so I don't forget.

We are required to put our lock on all loads. And the seals are a joke typically. Usally the shippers hand you the seal. You go put it on and leave. No one actually knows you did it. And most recievers say take it off and bring it in or throw it in back of trailer. Again no one sees. Doont get me wrong, some do check. I picked up aload of detroit diesel engines in Michigan once and i asked about a seal. They laughed and said "who's gonna get in there and walk off with an engine?" lol, true. Ironically enough when we got to the reciever they said there was one missing. I guess they figured it out.