Best 18' Garage Door Header

 
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Old 06-21-2012, 05:18 PM   #1
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Best 18' Garage Door Header


Double 1-3/4" X 11-7/8" LVL

or 3-1/2" x 11-1/4" Glu-Lam?

I've always used Glu-lam's in the past but nowadays they're $60 more so the suppliers seem to assume you'll want the LVL's.

The Glu-Lam has a very slight arch to it (unloaded).

What are your thoughts?

The $60 difference is not an issue.
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Old 06-21-2012, 05:22 PM   #2
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Re: Best 18' Garage Door Header


Have you sized out and priced a wide flange beam yet?

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Old 06-21-2012, 05:56 PM   #3
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Re: Best 18' Garage Door Header


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Have you sized out and priced a wide flange beam yet?
No, this is for a single story structure with a fairly small ceiling and roof load.

Steel would introduce some additional connector issues and be overkill.

I've never had an issue with excessive deflection with the Glu-lam, possibly due to the positive camber.

A loaded LVL will have some defelection. Normally, deflection isn't too noticeable, but with a garage door header you have the reference of the door. If you go with a raised panel door, it is even more noticeable if there's any sag.
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Old 06-21-2012, 05:58 PM   #4
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Re: Best 18' Garage Door Header


Glu Lam...
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Old 06-21-2012, 06:40 PM   #5
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Re: Best 18' Garage Door Header


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Glu Lam...


I agree.

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Old 06-21-2012, 07:22 PM   #6
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Re: Best 18' Garage Door Header


We almost always use lvls for garage headers. No issues that I have seen. If it makes you feel better, go one size bigger and compare that cost.
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Old 06-21-2012, 08:03 PM   #7
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Re: Best 18' Garage Door Header


I like lvl's personally.... I don't really have too much experience with glulams (used one once).

My main thought here is that lvls are readily available, and you can half the wieght.

half the wieght because you can set them one at a time
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Old 06-21-2012, 08:28 PM   #8
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Re: Best 18' Garage Door Header


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Originally Posted by PaulPrice View Post
I like lvl's personally.... I don't really have too much experience with glulams (used one once).

My main thought here is that lvls are readily available, and you can half the wieght.

half the wieght because you can set them one at a time
Weight is not an issue, I have lift equipment. I'm pretty sure I'll insist on a Glu-lam so I don't have to nail/bolt the two LVL's together.

Thanks to all who commented.
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Old 06-21-2012, 08:38 PM   #9
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Re: Best 18' Garage Door Header


Is that a bearing wall and if yes what is the load that header will be supporting? In some cases you will need a larger header then 3.5 X 11.5 header to carry the load over an 18' span.
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Old 06-21-2012, 08:40 PM   #10
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Re: Best 18' Garage Door Header


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Originally Posted by txgencon View Post
Weight is not an issue, I have lift equipment. I'm pretty sure I'll insist on a Glu-lam so I don't have to nail/bolt the two LVL's together.

Thanks to all who commented.
3 clips of nails, and 3 minutes of time. I will take the sixty bucks.
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Old 06-21-2012, 09:01 PM   #11
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Re: Best 18' Garage Door Header


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3 clips of nails, and 3 minutes of time. I will take the sixty bucks.
I've used LVL's before in a floor system. The specs specified a specific nailing pattern and either 5/16" bolts or 16d CC sinkers (different pattern depending on which fastener used) and PL construction adhesive. I've not found a source for this kind of gun nail.

I'm assuming the same would hold true for this application.
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Old 06-21-2012, 09:08 PM   #12
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Re: Best 18' Garage Door Header


Quote:
Originally Posted by greg24k View Post
Is that a bearing wall and if yes what is the load that header will be supporting? In some cases you will need a larger header then 3.5 X 11.5 header to carry the load over an 18' span.
It's a load bearing wall on a 22' wide structure with 2x10 ceiling joists with 5/8" fire rated rock and a 6/12 pitch roof with 300#/sq roofing. Boise spec'd the LVL's mentioned. A 3-1/2" x 11-1/4" Glu-lam is a structural step up.
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Old 06-21-2012, 09:09 PM   #13
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Re: Best 18' Garage Door Header


Quote:
Originally Posted by txgencon
Double 1-3/4" X 11-7/8" LVL

or 3-1/2" x 11-1/4" Glu-Lam?

I've always used Glu-lam's in the past but nowadays they're $60 more so the suppliers seem to assume you'll want the LVL's.

The Glu-Lam has a very slight arch to it (unloaded).

What are your thoughts?

The $60 difference is not an issue.
Lvl cheaper? Not here- lvl is the more expensive option here in southern Utah. I just priced a 26' beam and lvl was $100 more. If I had a way to put em up I'd use glb but where I have a 3 man crew right now I use lvl, one at a time. I always nail 3" o.c. Vert and 12-16 o.c down the length. Unless I have engineering that details a pattern of course.
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Old 06-21-2012, 09:16 PM   #14
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Re: Best 18' Garage Door Header


Gun nails can be used on lvl. Minimum size is .128. Just need a few more.
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Old 06-23-2012, 01:02 AM   #15
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Re: Best 18' Garage Door Header


In Los Angeles, everything here is overkill seeing homes built in the 40's and 50's without the expensive hardware are still standing, even through all the quakes. On garage openings we always put simpson strong walls on either side of the garage and mount a parallam across them, attaching up through the strong wall with 3/8" lags. Parallam are fairly heavy compared to a glue-lam or even a fir beam.
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Old 06-23-2012, 05:13 AM   #16
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Re: Best 18' Garage Door Header


"A 3-1/2" x 11-1/4" Glu-lam is a structural step up."

You should have someone verify that before you install a Glu-lam where an LVL beam has been specified. Glu-lams are available in different grades and layups.....some are stronger than LVL.....some are not. And 5/8" difference in the depth can make for a considerable difference in the stiffness of a shallow beam.
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Old 06-23-2012, 07:03 AM   #17
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Re: Best 18' Garage Door Header


Quote:
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"A 3-1/2" x 11-1/4" Glu-lam is a structural step up."

You should have someone verify that before you install a Glu-lam where an LVL beam has been specified. Glu-lams are available in different grades and layups.....some are stronger than LVL.....some are not. And 5/8" difference in the depth can make for a considerable difference in the stiffness of a shallow beam.
I had the supplier go back to Boise Cascade and specify what I wanted and its application. The person doing the takeoff had interpreted my request for an "18'-9" garage door header" to the least expensive 20' long beam. On previous projects, I have been supplied a Glu-lam Boise makes specifically for garage door headers that was 3-1/2" x 11-1/4" x 18'-9". The beam they have specified now is 3-1/2" x 12" x 18'-9". This beam is "suitable for garages with a second floor above".
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Old 06-23-2012, 07:17 AM   #18
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Re: Best 18' Garage Door Header


Like this..
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Old 06-23-2012, 08:58 AM   #19
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Re: Best 18' Garage Door Header


We pretty much use LVL's exclusively.
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Old 06-23-2012, 09:02 AM   #20
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Re: Best 18' Garage Door Header


I would lean towards a power beam at 18ft or try the new LSB.

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