iseedit - 9/4/2013 14:21
Pofarmer - 9/4/2013 13:52 Got a 42' k mar building with scissor truss. Several buildings of similar vintage, not necesarily kmar, have gone down under snow load the last couple winters. Is there any way to evaluate the truss plates and etc for fatigue? The posts are good, but just the age makes me nervous. Most ag buildings are really only a 20-25 year design lifespan.
Are they breaking down, in the truss plate area ? Or, is the breakage in the wood itself ?
I haven't seen any broken truss's in the connecting joints or truss plate areas - the ones I've seen have all been due to the wood breaking
(not enough strength
).
A guy could increase the load bearing by adding plywood laminated
(glued and screwed
) to the wood itself .. .
(i know I'll likely get flamed for such a suggestion, as I"m not an engineer, but it works
).
If they are breaking in the truss plate area, then adding metal or plywood on both sides there could decrease the likelyhood of failure . . . .
Old machine shed trusses.
