I’m trying to whip up a design for a relatively small pole barn structure (24′ x 48′). I wanted to do a shed roof with LVL rafters but my lumber yard is telling me their supplier says it can’t be done with my snow load for the roof (ZIP 13440 – Upstate NY). I really don’t want to use trusses if I can avoid it, I wanted to leave the ceiling open on the inside.
Do I have any options other than a mono truss (which wouldn’t look as nifty)? I was thinking a 2:12 or 3:12 roof pitch.
Replies
I can't imagine that it would be cost effective to frame a 24ft roof with lvl's.
That is a standard width for pitched roof trusses, and will cost waaaaaaaaaaay less than using lvl's.
I wanted a shed style roof to keep the height down as to not overpower the rest of my site. I think I may compromise on a mono/scissor truss (we'll see how that quotes out).My inspiration for using LVLs (and the style) was this design (minus the lawn on the roof):
http://harrisonarchitects.com/projects/outbuildings/green_roof_workshop
I'm not sure exactly what a mono truss is... but you can get a parrallel chord truss that should work nice in that application. What kind of centers will the trusses/rafters be on?
Does the roof have to slope one way only? Pole barn trusses that size are pretty economical.
You might be able to get some really deep glulams to span the 24'. Keep in mind that they don't HAVE to be single ply. But if you get to looking at 2 ply beams you're gonna get into serious money.
Matd is that going up against another structure?
If it isn't why not trusses?
By the way, How is Rome, I live in Utica?
By the way, my mother mentioned I was born in Rome. Trincus Manor Inn (sp?) still around?A Great Place for Information, Comraderie, and a Sucker Punch.
Remodeling Contractor just outside the Glass City.
http://www.quittintime.com/
my mother mentioned I was born in Rome
So, you going to cop to being Romulus or Remus now?
At the very least I can welcome you as an honorary Fat Roman!'Man who say it cannot be done should not interrupt man doing it' ~ Chinese proverb
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Nothing so ROMANtic as Italy. But Rome, NY in the springtime.....A Great Place for Information, Comraderie, and a Sucker Punch.
Remodeling Contractor just outside the Glass City.
http://www.quittintime.com/
Burned down about 15 yrs ago. Just a vacant lot now!
You sure it was only 15 years ago? I could have sworn I was a young lad when that happened. Maybe sometime in the mid-late 80s?
yah, you are right, more like 25 yrs ago. Time goes fast!>G<
I remember as a very young boy-lobsters in the tank and deer on the other side of the glass.
Wow, what sticks in the mind.A Great Place for Information, Comraderie, and a Sucker Punch.
Remodeling Contractor just outside the Glass City.
http://www.quittintime.com/
I will never forget the Christmas dispay of lights! It was huge.
The motel is still there, but the rest. burned in an unexplained fire.
For the life of me, I can't imagine why you would want to wrestle such heavy expensive material up there when you can do it easier and less expensive with TJIs or web trusses.
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Taunton University of Knowledge FHB Campus at Breaktime.
where ...
Excellence is its own reward!
I read an interesting article in Mother Earth News about making long beams, rafters, etc by laminating reclaimed railroad ties.Sure, it takes more materials, but hey, they're cheap. Be sure to follow a good nailing pattern, though, and don't stint on those 12" spikes!AitchKay
LOL, anyone who takes their building advice fro MEN deserves to get railroaded
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Well, OK, I made that up. But I've known MEN types who've drywalled their houses with scraps culled from the landfill!Ya gotta love it!AitchKay
What's your ground snow load? You can size the beam by figuring the load each beam will carry. You can always double or triple them. What you are looking to do is possible... but costly... and you will probably want to use a crane to set them.
Edit: You may need an engineer to approve the design to pass inspection.
Edited 4/3/2009 7:10 pm ET by Doobz26
What's your snow load?
I can't imagine that 1-3/4"x14" LVL's spaced 16" OC would not handle the loads that you have. They have a lot of strength, and even more cost.
Jon Blakemore
RappahannockINC.com Fredericksburg, VA
My area is 65lbs for snow load.The mono/scissor truss I mentioned is shown on this page:
http://www.northlandtrusssystems.com/products.html
You can do it with LVL's, but as the others have said, a truss would be a lot cheaper.
Jon Blakemore RappahannockINC.com Fredericksburg, VA
If you are on 16" or 24" centers you'll be able to get I-Joists that can span that.
I think those trusses will work for you. Where are you building this?
I am building it in the outer district of Rome, near Westmoreland. I took the last 2 years to build my house, now I realized I need more space :)
I used to live on Bartlett Rd.
I can't think of a better application for an engineered steel building.