When The Bridge Has A 10 Ton Limit.............

Horizon170 wrote:
Non related question.
When a sign says 10 ton limit, does that mean no vehicle over ten tons or the combined weight of all vehicles on bridge may not exceed ten tons?
I think the latter.

My understanding is it's the vehicle weight, not the total bridge weight, unless indicated otherwise. Many posted bridges are small enough and narrow enough that it's a moot point; you can't fit much more than one large vehicle on it at a time anyhow. (There are others, of course, including the one in the video.)

Bridges (and other safety-critical rigging or supports) are generally designed with a safety factor of several times the expected load, maybe around five times for a typical bridge if such a thing exists. A ten ton bridge would be designed to support something like 50 tons without failing catastrophically.