I'm having issues determining my limiting forces on an existing truss. I've determined that the truss is a 24LH05. I've also figured that under distributed loading of snow and dead loads, i'm within the allowable limits. In addition, if i convert the point load to a distributed load, i'm...
@pad, i did find that article before i posted on here, but did not find it very helpful. The asce report looks pretty good though.
@jrg, thanks, the load tables are great. gives me a starting point at least!
I was asked about shoring and bracing for a 12' steel w shape to be supported on concrete block walls that are on a dox plank flooring system. Contractors seem to be shying away from it because i think they are unfamiliar as well. I've honestly never heard of the system until today and dont...
Sorry, correction, its actually a 1 1/2 story cape (attic space converted to loft) and shed dormer on rear. Contractor tells me adding rafters is nearly impossible (calcs show that a sistered 2x6 would work at 48" spacing) The solution IMO is to remove the system, and reattach as designed.
a2- precisely, my original design submittal was to fasten to each rafter at 16"oc, but the contractor basically went ahead and did "past practice" and attached every 48" and would like us to certify.
Well, it is an existing dwelling, with 2x6 rafters 16"oc, 14' span. They would like to mount the system every 4 feet. Since the array basically becomes a new roof structure, all loads that would typically bear on the rafters at 16" on center, now would fall on a 2x6 48" on center. According to...
That is correct, the repetitive member factor can be multiplied by the bending stress Fb in some conditions, but how does that factor relate to modulus of elasticity, E in a deflection calc?
Thanks, and yes I think load sharing is the better term. I have been using the tributary area for loading, but it was recently suggested to me that I should account for the sheathing which would aloow for greater spans/loading. I just wanted to be sure I wasnt missing something.
In order to determine the load a roof can handle, I typically analyze one of the rafters, and convert the uniform roof load to a distributed load on each rafter. Long story short, I check up to deflection criteria. My question is, how do I account for roof sheathing as a diaphragm which in...
