[johnsjmc]

I bought and repaired a good sized sailboat(Schock 34 perf cruiser) which had been traded in. While the dealer was moving it from the shore to their marina the trucker caught the mast on a bridge(the mast was down and tied to the railings.) There were 145 holes in the top of the boat from screws pulled out to 6x6 holes where the railings pulled out complete with their backing plates. Steering column broken, mast shortened by about a foot. Took about a month and 10k (35 k insurance claim paid to the dealer )to fix but the damage was extensive.
The standard height for a bridge on an interstate is something like 13 ft. Off highway you need to keep an eye peeled for a low bridge if you are anywhere near max height.