schmism
Super Member
what kind of trusses are you setting? if they are standard AG truss, 8' OC will have a 2x8 bottom chord or better. this means there is no "filler" required between webs if you stack other 2x8's behind it to beam the 10' opening.
But hears the deal, usually the gable ends are just regular full span trusses with addtional blocking. As such they are designed to carry a full 8' OC on full span.
but as your on a gable end, you only have to span 10', and if you have 0" overhang on the front you are only carrying 4' of load.
in other words, look at the weight of your door (a 2x4 wall with drywall both faces is usually speced out at 6psf,) so 10x13=130*6=780lbs for both doors /10'opening = 78plf on the bottom chord of the gable truss.
check with your truss guy but my guess is, your standard AG truss can support that weight already with no addtional header.
NOTE, the gable end truss is not designed to take horzontal windforce from the end of the building. You will have to make shure you properly brace the BC of the truss into the rest of the ceiling diaphram (which absorbs that horzontal force on the doors)
OTOH, if you are setting regular 2'OC 2x4 over2x4 trusses (common for a 30' wide building) you can have the truss plant insert a 2x8-2x10 on the bottom chord over the opening section to act as the above mentioned header when they build the gables. But thats if your gettting "custom" trusses and just not a spec 30' 4/12 1' OC fink truss.
(ps, i worked as an engineer for a ITW Alpine doing truss engineering for 5+ years, id pull up our softwere and run the truss myself to see if it would take the addtional load, but its late and im tired
)
But hears the deal, usually the gable ends are just regular full span trusses with addtional blocking. As such they are designed to carry a full 8' OC on full span.
but as your on a gable end, you only have to span 10', and if you have 0" overhang on the front you are only carrying 4' of load.
in other words, look at the weight of your door (a 2x4 wall with drywall both faces is usually speced out at 6psf,) so 10x13=130*6=780lbs for both doors /10'opening = 78plf on the bottom chord of the gable truss.
check with your truss guy but my guess is, your standard AG truss can support that weight already with no addtional header.
NOTE, the gable end truss is not designed to take horzontal windforce from the end of the building. You will have to make shure you properly brace the BC of the truss into the rest of the ceiling diaphram (which absorbs that horzontal force on the doors)
OTOH, if you are setting regular 2'OC 2x4 over2x4 trusses (common for a 30' wide building) you can have the truss plant insert a 2x8-2x10 on the bottom chord over the opening section to act as the above mentioned header when they build the gables. But thats if your gettting "custom" trusses and just not a spec 30' 4/12 1' OC fink truss.
(ps, i worked as an engineer for a ITW Alpine doing truss engineering for 5+ years, id pull up our softwere and run the truss myself to see if it would take the addtional load, but its late and im tired
)
