Post-to-truss building

[bighammer]

Residential housing has slowed down for some of us, so we have had acouple crews framing up post-to-truss buildings and every one seems to be constructed differently. We have built some that have the roof nailers over the trusses and others have the roof nailers in hangers between the trusses. Some posts are 8' o/c while others are 7'6" on center and some are even 10' on center(that spread, they nailers are 2"x6" and between the trusses in hangers).

Is any one familiar with any of the above systems and if so, what their thoughts are reguarding such a building design...and if they have incountered any troubles with one system over the other.

[joel]

retype that with spell check and I'll see if I can understand what you are trying to say

[Richard A Hetzel]

Funny. I didn't see a mis-spelled word in there at all.

Oh, sorry, there are two. Sue the man.

[Don_P]

:yinyang:...

[bighammer]

retype that with spell check and I'll see if I can understand what you are trying to say

I did not realize that we had the spelling police out and about...

[Rich]

missed this one I guess. Post/truss spacing may be more of a function of use - larger openings for garage doors down the road or something like that. As far as above versus between - I don't think there is much difference honestly. The hanger costs money and take some time to install - but it takes a similar amount of time and money to place blocking between the purlin when they sit on top of the truss.
I would say for me I would choose to put the purlin between the trusses in hangers with truss spacing 8' inside to inside. When placed above trusses it would make sense to overlap the purlin - making it difficult to sheet or keep a decent line for screws. I suppose you could butt them together but your blocking would only catch 3/4" of each purlin.. would probably still work I guess.

[joel]

Sorry . I was a little tired that night. I'm following you now. I can't see that big of difference. You would use less post with the 10 foot o.c. building but then you would have to nail all those hangers. I would likely go for an 8 foot building with purlins nailed on top of the trusses. Seems alot simplier to me.

[dljones]

forgive me if i am wrong
we have our trusses 48" o/c with 3-ply 2x6 posts 2x4's 24" o/c for the roof and 2x6 24" o/c for the walls (fits r-20 24" nicely)