AdamJSR
Civil/Environmental
- Jan 3, 2013
- 33
Hello All,
I have analyzed a fink truss (2x4 TC, 2x4 BC, 1x6 Webs (nailed) & plywood Gusset) that has had some substantial foam encased HVAC duct work hung from it. I am analyzing it to see if there might be a way that I can get some additional capacity out of it, but it appears that with my conservative values for the snow load, wind load, and HVAC loads the TC and BC are above 1.0 stress index!
I'm thinking that the BC is fine because there is a living space below with walls bracing it, but the TC is my issue!
Other than sistering the TC with new lumber, any other tricks you folks have found. I'm looking to strengthen it to get another 5-6psf out of it.
Thanks all
I have analyzed a fink truss (2x4 TC, 2x4 BC, 1x6 Webs (nailed) & plywood Gusset) that has had some substantial foam encased HVAC duct work hung from it. I am analyzing it to see if there might be a way that I can get some additional capacity out of it, but it appears that with my conservative values for the snow load, wind load, and HVAC loads the TC and BC are above 1.0 stress index!
I'm thinking that the BC is fine because there is a living space below with walls bracing it, but the TC is my issue!
Other than sistering the TC with new lumber, any other tricks you folks have found. I'm looking to strengthen it to get another 5-6psf out of it.
Thanks all