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Old 02-12-2013, 02:33 PM   #42 (permalink)
christofoo
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Quote:
Originally Posted by COcyclist View Post
Are you going to add a reinforcing triangle of steel as you show in this drawing just to the right of where you have the curving arrow showing 800 ft/lbs of force? I see this as a high stress area. A sudden bump will try to separate your weld here. I believe you WILL need to over-engineer this joint.

You pivot point could be anchored to the edge of the trunk lip with some straps. Looks great! Can't wait!
Exactly, those are angle-braces from 1/8" plate. I haven't put them on yet.

As a fail-safe, I'm probably going to chain the receiver to the box at the main rail and strap the top of the box to the top of the trunk. The frame should never fail though.

The strap could be preloaded to take some stress off the joints, in practice it'll have some tension; but I view it primarily as a fail-safe.
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