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Old 05-03-2009, 01:22 PM   #1
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Sagging Garage Door


I have 16' double garage door opening with a sagging header. I live in Houston, TX, so there is no concern for snow load.

The home was built in the mid-70's in an area that apparently did not have much of a building code at the time (about 20 years ago I actually replaced all the ceiling joists in the garage after one broke).

The header is two 2x12's with 1/2" of space between them. My thinking is to jack up the header until it is level & true and do the following:
  • glue & lag bolt a 1/2" piece of plywood between the 2x12s.
  • laminate (with glue & lag bolts) 3/4" plywood or osb to the interior side
  • laminate (with glue & lag bolts) 1/4" or 3/8" plywood or osb to the exterior side.
Will this work? Do you have other thoughts. Since I am 67, I am not really looking for 50 year solution -- 10 to 15 years ought to do it.

Many Thanks,

Don Simmons

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Old 05-03-2009, 04:00 PM   #2
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( DELETED due to embarrassment over believing the OP's story.)

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Last edited by Willie T; 05-03-2009 at 07:38 PM.
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Old 05-03-2009, 04:07 PM   #3
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You cannot jack it up and take the sag out of it. You can either replace it with the correct LVL"S or 2x12's with a 1/4" flitch plate.
Cutting it will do no good., visually or structurally
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Old 05-03-2009, 04:21 PM   #4
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How much sag?
You can't take ~40 years of sagging out with just jacking

You say double garage door opening....with a double garage door?
Sawing it off would make it level visually
But it would continue to sag
Maybe that would buy you the 10-15 years

Any pic?
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Old 05-03-2009, 04:35 PM   #5
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When a beam sags, it sags on the top and it sags on the bottom. Cutting off the bottom still leaves the sag at the top. This is very noticable in a hip roof and usually still visable with other roofs as the siding has also sagged in conjunction with the header.
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Old 05-03-2009, 05:43 PM   #6
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Please allow me to clarify.

As I said, there are two 2x12s with about 1/2" space between them. The inner one is cracked right at a knot and has about 4-1/2" long fissure. It is 1-1/2" below true at the knot. The outer one appears to simply be sagging, and it is about 1" below true.

The roof is a hip roof, so yes, there is some load bearing on this. But the sag is only very slightly apparent at the eave.

Don Simmons
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Old 05-03-2009, 06:19 PM   #7
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In that case I think jacking it up & inserting the 1/2" in between might work
A 1" sag isn't that bad
I'd try jacking up the middle & see if it will come back any
If it does then nail/screw it down while jacked up
Actually I would jack it up anyways before makingthe repair

Very weird they didn't tie the 2x's together
I'd say the fix should get you another 30 years
Sag may be due to the 2x failure
Do you know when it occured?
Any way to attach another 2x on the inside for added support?
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Old 05-03-2009, 06:51 PM   #8
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I think it sagged on March 30th, 1983.

If you cut (weaken) some of the bottom tension fibers, roughly only 2-3" thick, fail it may. Just do as Ron said, choice A or B.
Sounds like one is broken , wouldn't do to flip it! Be safe, G
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Old 05-03-2009, 07:25 PM   #9
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Quote:
Originally Posted by GBAR in WA View Post
I think it sagged on March 30th, 1983.
OK, I did a search, didn't turn up anything
What happened on that day ??
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Old 05-03-2009, 07:33 PM   #10
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Geez, Don! 1/2 half of your support beam structure is cracked in two, and this didn't seem like a pertinent detail to mention?

This isn't called "sagging"; this is known as "falling".

You'd probably be a lawyer's worst nightmare on the stand. "Oh yeah, I forgot to mention that he tripped and fell down the stairs right after I hit him in the head with the baseball bat."
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Old 05-03-2009, 08:25 PM   #11
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Willie T,

Well, my daughter is a lawyer, and I guess I have been her worst nightmare for quite a while now.

Mea culpa for not mentioning this the first time. I guess I just want to know if I can fix this or I have to call in a contractor to replace the entire header.
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Old 05-03-2009, 09:20 PM   #12
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Quote:
Originally Posted by donandlinda66 View Post
Willie T,

Well, my daughter is a lawyer, and I guess I have been her worst nightmare for quite a while now.

Mea culpa for not mentioning this the first time. I guess I just want to know if I can fix this or I have to call in a contractor to replace the entire header.
This is a job someone with a decent skill set can accomplish. No one on the internet can know if you have that skill set.
It's a job that will require two people.
Ron
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Old 05-03-2009, 09:47 PM   #13
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I've put up 24' LVL's by myself
It will be MUCH easier with 2 people

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