Nobody set your trailer brakes!
It’s at least zero degrees.
Oh wait, Canada truckers know this.
(The rear brakes can freeze locking your trailer wheels.
If you let the air out of your truck brakes at this temp
the air lines can freeze too.)
So proud of them.
The cost of this is incredible.
Some companies believe it’s more affordable to put their
driver in a hotel over night rather than idling the truck
for heat or to keep it and product from freezing.
To avoid brakes freezing when I was trucking in the northern states, I had wood blocks to use as wheel chocks. Then I would insert 20 gauge sheet metal shims about a foot long and an inch wide in between the shoes and drum, then set the brakes.
I would poke them in about 4” with the last 8” bent out at an angle for a handle end. Set the brakes, plug in the truck (if going to the house), and come back the next day, start up the truck release the brakes and pull the shims. Set the brakes, and remove the wood wheel chocks.
If I needed to use my hammer, it was to knock out a chock(s). But I didn’t have to crawl under the truck for that!