Whats the load?

But not likely.....

This is out of your wheelhouse and what engineers are for.

 

Griz nailed it...way over any of our pay grades. That is a HUGE span to do with wood. Go steeper pitch and do a scissor truss...?

 

My lvl supplier will run these numbers for me the same day and for no cost. That includes paper work with all the calculations. I would try that out. If your supplier won't, try a new supplier. If you can't find one, pay an engineer.

 

I've never seen a supplier that will calc a beam for me.

Not done out here.

calcs are great but without the stamp worthless.

 

For your reading pleasure:
http://www.weyerhaeuser.com/files/document-library/1484029203_TJ-9000.pdf

 

If I'm reading it right:

An 18" tall 5 1/4" paralam would get you 334 pounds per linear foot live load, or 20 pounds per square foot snow load on that 32x32 structure. What's your snow load?

 

I wouldn't be surprised if it failed deflection with zero load. Big big glue lams do these spans all the time though, and they look prettier.

 

If your trade is Framing, you should know better than ask that question in here or anywhere else for that matter. Open LVL chart and you will find the answer.

 

That's great that you guys can get a beam calc'd for you.

What about the rest of the stuff that goes with it?

Footings, hold downs, seismic calcs, shear wall calcs. hardware for post to beam connection, rafter connection....etc....

We can all likely guess as to what it takes, but I am not hanging my azz out liability wise without having a set of stamped drawings and a permit.

For you guys with little to no involvement with plans, specs, engineering & AHJ's you have it easy to an extent.....

But, wherever you are without any of the above...I'll guarantee you there is a lawyer and a judge not very far away.....

 

I would never suggest that a job that needs a set of stamped plans and or a permit proceed without them. The question in the thread was regarding the LVL.

 

Short answer. No. Absolutely not. You can find your answer by looking at tables in the net. What you will find though, is that you will have a hard time doing that span with lvls.

 

32 whole feet of inside and not one opportunity for a post?

IN THIRTY TWO FEET?

Like, a church?

Maybe, like in a church, there could be some timber trusses?

 

Why not use a ridge board?

 

Can you explain that?

 

So I'm working with a customer that wants a 32'x32' cabin, & he insists on a clear spanning roof ridge.

I'll have to agree, He needs to tell this to his architect. Then said architect can hand you over the stamped plans to build. :thumbsup:
Is he asking you to design and engineer it:no:

 

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Is this a gable roof or a hip roof? Maybe a dutch hip??

 

Our truss salesman sizes LVLs for us. I just did a 30' span with four 24" LVLs and it sucked ass. That was a floor load, though. 40/sqft

 

Very few builders here use LVLs for something like that . Pretty much all glu-lams used. Look and finish much nicer IMO.

 

The quadruple 24" LVL was among the dumbest **** I have ever done, I think. It was a change order to replace a double 11 7/8 to get rid of two posts, for a future pool table. We rarely do stick framed roofs for the company I work for, but we have done a 34' lose bearing ridge in one house, but the rafters landed on walls upstairs, I wasn't involved with the figuring on that job.

 

I have no working knowledge of live / dead load calculations for roof systems.

There's the issue. No load information in the question at all, so no possibility of general sizing. Collar ties give a prescriptive solution.

 

Now we're getting in to non structural ridge and all the misinformation that always comes with that.

Collar ties are not prescriptive code. Ceiling joists are. Must be in the lower third, and they have to be on every rafter, and at low pitches like that they might need more nails than the wood can handle. 14-26 nails at this slope and span depending on snow load, if they're on the plate. More if they are higher. Also there isn't any ceiling joist in the prescriptive tables that spans 32 feet, so it needs a king post to hold it up. Then it's an engineered solution.

No matter what, this is engineered, but it's not that hard. A big glulam, attached to big posts that go to big footings.

 

Just use steel

And download Weyerhaeuser's free structural design app, Forte. Then you won't have to embarrass yourself by coming here and asking a structural question, when the prime sticky thread says DON'T.