We used 1/4-20 carriage bolts hammered in the spec-size plywood through a 1/4" thru-hole. Typically, only 2 bolts per bumper are needed. The square shank under the head bites into the plywood and keeps the bolt from turning while being tightened. The bolts ran through holes drilled into the side frame members (1.5"x1.5" welded aluminum tubing frame) and fastened by wing nuts that are hand tightened (i.e. no tools).
Quote:
Originally Posted by Al Skierkiewicz
The best one used eye bolts on the back of the bumpers which simply dropped over threaded rod on the chassis and attached with butterfly nuts. No tools needed and it only took a minute or so to remove for weigh in.
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That is a very clever idea. Do you recall which team used that method?
We might look into using that ourselves--thank you!!
