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Re: Ridge Beam Design [Re: TIMBEAL] #25743 03/02/11 03:02 AM
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mo Offline
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I agree with the others about the weak link at the bottom chord and top chord joint being so close to the tenon into post.

Tucker, Have you thought about placing your bottom chords on top of the posts? You could shoot past the post with bottom chord and place a purlin out there. Plenty of room for all the forces in the truss to work themselves out.

It just so happens I designed something similar for a pick em up truck park. Mine has a slightly greater pitch but the design sits low.

Wall raising....


Re: Ridge Beam Design #25745 03/02/11 03:35 AM
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Paul Freeman Offline
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Very nice! Notice how the lower truss rafter lands on the chord at a point very close to the post. If the landing point of this lower rafter is within a 45 degree line across the beam from the top of the post there is actually no vertical shear. (i.e. the horizontal members at stonehenge are so deep that their entire length falls within a 45 degree line of the verticals resulting in zero bending in the very brittle stone, similar to a brick arch.. but different...) anyway.... this design is not delivering an undo bending moment in the chord... nor is it delivering an unfortunate shear load across the truss connection. Nicely done!

Re: Ridge Beam Design [Re: tucker] #25772 03/03/11 11:03 PM
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tucker Offline OP
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Thanks for all the help!
I sent what I have to an TF engineer and I will let him look at the truss design and see what he suggests. The brainstorming that takes place on this forum website is truly an asset to the guild and its members!
cheers

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