Pole Barn Roof/Wall Perlins

[JDGREEN4ME]

Would you use 2"x4"s or 2"x6"s for roof perlins? I have some people bidding 2 x4 on 24" centers for the roof and one other guy is bidding 2x6 for the roof and 2x4 for the walls. Now 2x6 sounds like it would be more substantial, is it a good idea? Trusses spaced 4' on center
Also, some are bidding 6"x6" poles and others are bidding 4"x6" pole.

 

[jonnysteals]

I just got done building a 30-40 pole barn. my roof perlins are 2x4 24 inches on center. They are quite sturdy and never saw the need to upgrade to 2x6's/ honestly. My old pole barn we built were 2x4 on 2 foot centers as well

 

[Duffster]

Would you use 2"x4"s or 2"x6"s for roof perlins? I have some people bidding 2 x4 on 24" ceneters for the roof and one other guy is bidding 2x6 for the roof and 2x4 for the walls. Now 2x6 sounds like it would be more substantial, is it a good idea?

What spacing is your framelines?

8' oc we use 2x4 purlins and 2x6 girts.

 

[JDGREEN4ME]

What spacing is your framelines?

8' oc we use 2x4 purlins and 2x6 girts.

The guy bidding 2x6 purlins has 6x6 posts spaced 8' with the trusses spaced 4' on center.

 

[beenthere]

Depends on what the roof pitch is too.

As well, it depends on the grade of the 2x4's and the 2x6's.

Also, what deflection is tolerable in the future?

There are a number of inter-acting variables in your decision.

 

[ray66v]

Use trusses on 24" centers, and forget about the purlins.

 

[Duffster]

The guy bidding 2x6 purlins has 6x6 posts spaced 8' with the trusses spaced 4' on center.

2x6 in that case are pure overkill IMO.

Use trusses on 24" centers, and forget about the purlins.

What do you screw the steel to then?

 

[Duffster]

Also, some are bidding 6"x6" poles and others are bidding 4"x6" pole.

What size building? Height?

 

[ray66v]

What do you screw the steel to then?

He did not say he was using a steel roof. I never do.

 

[JDGREEN4ME]

What size building? Height?

24' x 24' x 10' 6" with 6/12 roof pitch. Steel roof and wall.