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-   -   Garage door header (http://www.diychatroom.com/f19/garage-door-header-135831/)

cardsman 03-03-2012 05:50 PM

Garage door header
 
I am spanning a 16' garage door. I have together the equivalent of two 2x12's. My trusses will be 24 oc. Is this sufficient support in the header

claymcc 03-03-2012 06:16 PM

Not even enough info for a guess.

mae-ling 03-03-2012 06:23 PM

What is the span of the trusses?

Daniel Holzman 03-03-2012 07:26 PM

This is a pretty typical question on this forum, you are looking for a design for a structural member. I don't size structural elements over the internet, but in case you find someone who is willing to do it, this is the information you MUST furnish to them in order to get a realistic answer:

1. The total load that the header will support. This comes from a detailed plan showing the tributary area the header will support, multiplied by the code mandated load per square foot for the tributary area, which for a garage may include floor loading plus roof loading.

2. The clear span of the header.

3. Any point loads the header must support in addition to the distributed load.

4. Detailed information regarding the foundation support available on both ends of the header, since the header almost certainly will be supported by king and jack studs.

firehawkmph 03-03-2012 09:34 PM

Quote:

Originally Posted by cardsman (Post 869416)
I have together the equivalent of two 2x12's.

What exactly do you have for the equivalent?:huh: (2) 2 x 12's are (2) 2 x 12's. Go to your local lumberyard with your prints (?) and they will size it for you.
Mike Hawkins:)

House Engineer 03-04-2012 09:00 AM

Try to do a Goggle search for "How to determine the size of a garage header". There are numerous charts that give header sizes if you know the load and span and type of wood. Check 10 different websites or more and you will hopefully get a consensus of what the size should be. Like has been said, the internet design method is not the best way to go. But if you get the same answer from 10 websites, it may be close to the correct answer.

ddawg16 03-04-2012 10:35 AM

I have a 14' door in my 20x25 garage....

THAT header is a PSL beam....7.25"w x 11.25" tall.

In the old days...a couple of 2x12's as you noted was sort of the norm....easy to spot them....they are the ones sagging in the middle...

If you click on the Garage Build link in my sig, one of the pics is of the garage header.

rossfingal 03-04-2012 10:52 AM

"cardsman"
Built a garage, last Fall.
Header - (2), 2 X 14 (nominal), "Micro-Lams" -
"Bolted", together.
Our "codes" may be different than yours! :)

rossfingal

(Also - what "Daniel Holzman" and "ddawg16" - say!)

troubleseeker 03-04-2012 11:20 PM

Quote:

Originally Posted by cardsman (Post 869416)
I am spanning a 16' garage door. I have together the equivalent of two 2x12's. My trusses will be 24 oc. Is this sufficient support in the header

Not in my opinion, even without questioning the posibility of how much load it may be carrying. Even with no load, it will have a very noticeable sag within a couple of years. This is a job for an engineered product like a LamBeam or steel. Check out a product called LiteSteelBeam, sometimes referred to as LSB.

Whatever you use, take to heart the suggestions of other posters that anyone who gives you serious structural advice in a forum like this is best ignored. Every structural design is specific.


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