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Old 10-24-2012, 06:41 PM   #31
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Where is " the desert" A4J?
Palm Springs
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Old 10-24-2012, 06:50 PM   #32
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i would make sure the beam is an LVL style beam
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Old 10-24-2012, 07:55 PM   #33
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I am a union carpenter and what your talking about doing is not a big deal. If you put your beam above the ceiling it's a little more trouble but still not a major project. It's actually more of a pain to do foundation work for the posts than it is the rest of the project.

If the ceiling joists are shored up properly you shouldn't have a problem getting the two sides to line up as one. If there is a slight difference a good drywall finisher can feather that joint out and you'll never know it was there.

I would personally leave at least part of the beam below ceiling height and wrap it in a nice hardwood. But that's just my opinion.

No worries man. If was in Cali I'd give you a hand.
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Old 10-24-2012, 09:39 PM   #34
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I am a union carpenter and what your talking about doing is not a big deal.
Thanks brother.... im a union steelworker. Im totally comfortable working with metal, wood not so much at all..i wouldnt even know how to wrap it in hardwood...lol
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Old 10-24-2012, 09:40 PM   #35
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Palm Springs
Ahhh ur not to far... i work in colton and live in upland
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Old 10-24-2012, 09:40 PM   #36
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just guessing on pics here... so don't take this too serious and run out to buy something. But this might help when you are talking to a local on doing some work... don't let them run ya round for big $$

loading on top chord (dead load) =

Asphalt 4psf (over calc for 2 layers)
15lb felt .15spf
1/2 OSB (most likely) 1.43psf
Blown insl. .1psf
possible 2x6 chords 1.5psf
added 3psf for wood shingles over asphalt
misc mech. 1.5psf
1" plaster ceiling (another guess) 8psf

20psf standard top chord live load
10psf standard bottom chord

total loading: 49.68, lets say 50psf (guess)

Now, looks like a 20' span (another guess)... so 50psf x 20span = 1,000

1,000plf would be each truss' (or rafter's) load bearing at the walls, 2 bearing walls... one at each end & we break that down to 500# each bearing but @ 1' (because we dealt with per sq ft earlier)... they look to be 2' o.c. (on center spacing) - so 500plf x 2 to cover the 2' spacing... & we're back to 1,000# bearing load at each end of the truss/rafters

if a beam is taking 1,000# every 2' we can say it has 500# every 1' of length.

If the opening will need a 10' beam, then 10 x 500 = 5,000# of load from the beam. since it bears on 2 posts (or will be...) each post will see 2,500# of load from each end of the bm.

a 3 1/2" x 9.5" glulam bm should work, as will a 3-ply 1 3/4" x 7.25" Microllam LVL



A lot of ifs and buts though... this is why it might be best to have an engineer come look & do a jobsite check. Better to know for sure than guess. A bowed ceiling and cracking plaster later on would suck and cost an eff'n ton more.
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Old 10-25-2012, 12:00 AM   #37
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Originally Posted by VegasJ View Post
just guessing on pics here... so don't take this too serious and run out to buy something. But this might help when you are talking to a local on doing some work... don't let them run ya round for big $$

loading on top chord (dead load) =

Asphalt 4psf (over calc for 2 layers)
15lb felt .15spf
1/2 OSB (most likely) 1.43psf
Blown insl. .1psf
possible 2x6 chords 1.5psf
added 3psf for wood shingles over asphalt
misc mech. 1.5psf
1" plaster ceiling (another guess) 8psf

20psf standard top chord live load
10psf standard bottom chord

total loading: 49.68, lets say 50psf (guess)

Now, looks like a 20' span (another guess)... so 50psf x 20span = 1,000

1,000plf would be each truss' (or rafter's) load bearing at the walls, 2 bearing walls... one at each end & we break that down to 500# each bearing but @ 1' (because we dealt with per sq ft earlier)... they look to be 2' o.c. (on center spacing) - so 500plf x 2 to cover the 2' spacing... & we're back to 1,000# bearing load at each end of the truss/rafters

if a beam is taking 1,000# every 2' we can say it has 500# every 1' of length.

If the opening will need a 10' beam, then 10 x 500 = 5,000# of load from the beam. since it bears on 2 posts (or will be...) each post will see 2,500# of load from each end of the bm.

a 3 1/2" x 9.5" glulam bm should work, as will a 3-ply 1 3/4" x 7.25" Microllam LVL



A lot of ifs and buts though... this is why it might be best to have an engineer come look & do a jobsite check. Better to know for sure than guess. A bowed ceiling and cracking plaster later on would suck and cost an eff'n ton more.


What is the pricing like on these beams? Its nice to have some calculations to referance. One contractor came out took a look and said 4x4 posts and 4x8 header...if he could fit it, 4x6if he couldnt. I have a truss company like a block away, do most sell to the public? Im working long days so im gone 6 to 6 and its hard to get over there. And i believe the studs are 16 on center. Not sure how much more that changes thigs. I will get a good measurement of the span when i get home today
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Old 10-25-2012, 02:50 PM   #38
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One contractor came out took a look and said 4x4 posts and 4x8 header...if he could fit it, 4x6if he couldnt. I have a truss company like a block away, do most sell to the public? Im working long days so im gone 6 to 6 and its hard to get over there. And i believe the studs are 16 on center. Not sure how much more that changes thigs. I will get a good measurement of the span when i get home today

This is scarier than my guesstimations... "I'll just use a smaller size if I can't get that big'n over der ta work" LoL

price varies across the country

most truss companies don't sell beams to the public but a few will include them in truss packages

a lumber yard would be a better choice, maybe hit one up and ask if they have an engineer that could size a beam & what that would cost?

give one near you a call... & no, I don't mean Lowe's or Home Depot! :0
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Old 10-25-2012, 07:22 PM   #39
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Thanks vegas... after calling a couple lumber yards i was put in touch with a manufacturer sales rep. He came up with the same sizing as you. He said a 3 1/2 x 7 1/4 would work but 3 1/2 x 91/2 ridgid lam will give me 30-40% over load. I called a local lumber yard and they said 67 bucks for 10 foot. Not to bad at all
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Old 10-26-2012, 11:57 AM   #40
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