Can I install a ceiling?

If the trusses are spaced 4' on center, you have much greater worries than any ceiling you might put up there. That's *much* too far apart to adequately support the *roof*.

Did you mean 2' on center?

Its all in the truss design. My barn has trusses on 10' centers and a 50 #/sq.ft. snow load design. Way plenty to hold a ceiling too,

But knowing this guy, his building will fail with the first heavy wet snow. maybe he lives where snow don't fall.

Karl

So your barn roof is supported by purlins as well?

Pete Keillor

They are 4 foot on center. Metal roof. Walls are 2x4 stick built 2 foot on center studs attached directly to a concrete pad. (I think the pad is thicker around the perimeter.)

My concern was with 4 foot on center whatever I use for the ceiling (osb, drywall, foam board, whatever) might sag? Is this true?

yep, 21" centers IIRC

This is where you investigate a suspended ceiling with insulation bats on the top.

Paul

While that would work for support, It would constantly drip water except during the summer months. Even the metal roof will have to have good venting, but will still sweat.

Paul

Stryped sez: "My concern was with 4 foot on center whatever I use for the ceiling (osb, drywall, foam board, whatever) might sag? Is this true?"

I can visualize drywall sagging some. Why not put some 2 x 4 headers in between the trusses?

Bob Swinney

They are 4 foot on center. Metal roof. Walls are 2x4 stick built 2 foot on center studs attached directly to a concrete pad. (I think the pad is thicker around the perimeter.)

KD7HB fired this volley in news:c6b0cda8-bc0d-41e7- snipped-for-privacy@q40g2000prh.googlegroups.com:

yeah... I have an open pole barn with 4'o.c. trusses and purlins, and 5Vee tin. It RAINS indoors every morning any time the humidity is over 70% (which it almost always is in FLA).

LLoyd