reinforcing wood trusses
 

reinforcing wood trusses
when reinforcing a wood truss member, what i've seen is people nail the member at whatever inch on center only. i don't think this is correct. when the member is nailed at some even spacing, it is only nailed in for shear flow. the member must be nailed in for the full axial force first at each end of the member before it can be nailed in for shear flow (to make the reinforcing member and the existing member composite).
do you agree with what i think?
thanks.
structural01
if a member needs to be reinforced to prevent buckling, obviously right at the end connections, a higher stress can be allowed. with equally spaced nails, the load will bleed into the other
the nds design specification has tables on the strength of nails, screws, bolts, etc. determine the load, then the number of nails then the spacing.
jike,
i think you seem to agree with what i say.
i believe the way to nail in for compression member is to cluster nails at each end per nds minimum spacings. but, of course there's a limit to how many nails you can cluster.

for tension member, it is not necessary to cluster in nails, like you said. nails can be evenly spaced per nds along the length of the
why are you reinforcing the
fss,
the way most of these truss manufacturers repair or reinforce wood trusses is by only nailing the member in tension/compression at some distance on center along the length of the member.
i don't think this is the correct way to reinforce or repair.
structural01