Partially Heated Pole Barn question

[slavoy]

Hello All,

Longtime reader, first time poster. I have a 42' W x 56' L pole barn building with corrugated steel siding and trusses spaced at 8' centers. I have almost completed finishing off the first 32' feet of the building for my heated shop (32'x42'). The remaining 24' x 42' will be left for cold storage. I put in a 2x6 partition wall underneath one of the trusses between the cold and warm parts of the building and I plan on blowing in insulation above the heated portion when funds become available. The partition wall is sheathed with OSB from the floor to the top of the wall, but I haven't covered the open area in the webbing of the truss above the partition wall because I haven't insulated it above the heated portion yet. The unheated portion of my building has a sliding door on it and I am wondering what to do to cover up the the open space in the webbing of the truss to prevent birds and other critters from getting up above the heated portion and nesting in my insulation.

I was thinking I would just cover the openings in the webbing with OSB. However, with a 42' span, I'm sure there's a fair amount of movement in the trusses given the extreme variations in temperature (I live in SD), so wasn't sure if nailing osb to the truss webbing was a good idea or not as I think it would "lock up" the truss from moving the way it is supposed to.

I suppose I could nail the OSB on the top chords and cut slotted holes for nails in the bottom chords to allow for movement, but wanted to see if anyone had any suggestions for this. Maybe I'm reading too much into this. I'm also wondering if I should be concerned with ventilation issues if I block off the webbing of the truss. The building has vented eaves and soffits.

Thanks in advance for any suggestions!

 

[bczygan]

Are the trusses designed to support any live load, besides their own dead load? If so, then install framing on them, adequate to support insulation. That truss above the partition wall must also need to be able to support the additional framing and sheathing, or else it will need to be further supported.

Alternately, you can provide framing independent of the trusses, supported by the partition walls, and then insulate.

Will there be a ceiling?

 

[Kev442]

I would think that if you stapled house wrap as a solid sheet and kept it tight and vertical, critters would leave it alone.

 

[Hop2it]

Somehow I can't get trusses on 8 ft centers mine are on 2 ft centers and this winter when I had a 1 1/2 ft pile of snow on it I got as much off as I could.
Doug

 

[Elginz]

Nail up the OSB, and put in gable end vents, outside and in the OSB of the truss you would be sheeting. You already have a wall supporting the truss, the OSB will just strengthen the truss. Not any different than a gable end wall.

 

[slavoy]

Thanks for your replies - I won't need framing or insulation in the truss because there's a ceiling over the heated portion - the area above the ceiling isn't heated. I think I'll just nail up the OSB and install vents as Elginz suggested as I have a bunch left over from the project and it'll be easy to cut in an access door into the OSB. For some reason, I wasn't sure if I had the same situation as a gable end wall.

Thanks again

 

[Whirnot]

If you put a wall below the truss, you have lacked it in. I would just sheet with OSB. The truss is more rigid than you imagine. I will be doing the same with 38 foot trusses on 12' centers