Framing for 18ft 9ft high garage door.

[larrylwill]

I need to know how to frame out a 18ft 9ft high door opening. My wall hight is 10.5ft which is where the trusses will set. This is basically a pole barn 2x4 frame with trusses and metal siding.
Do I really need a 2x12 LVL header over the door?
Do I frame the header so it sits 9ft above the ground and 18ft wide then put on the gable end, then studs between the gable end and the header?

 

[mobetta]

you could use a truss for the gable wall
that would cut down the header needs
rough opening should be the call size of the door, then trim it out w/ 1x material

 

[larrylwill]

I ordered 12 trusses and 2 gables which are trusses except extra 2x4s to nail the siding to.
So I don't understand. Do you mean I do not need the 12" header or do you mean have a flat truss built to go under the gable truss? The header cost $75 Since I already ordered everything Im trying to find out if I really need that header just for the garage door. I cant see that its holding up anything except the door.

 

[LIVELY]

the 12 inch header is not just for support--it is also for strength against a wind load from either side.
you didn't say how thick you needed but it should be atleast 3 [2 x 12 ]thick or a manufactured pressed beam or ladder design

 

[larrylwill]

Its a LVL from the Truss company 2x11-3/4 I told them what I needed it for. Its a 20ft or I can cut it down to 18ft 6" and use 2 2x4 jack studs.

 

[LIVELY]

is this going to be an overhead door or sliding pole barn doors?

 

[larrylwill]

overhead uninsulated they claim a 1/2 hp opener will open it.

 

[1500hd]

Is the door gable or eave entry.

 

[larrylwill]

Is the door gable or eave entry.

Its just a overhead garage door, I haven't a clue what your asking.
Above the door will be a gable truss.

 

[Daniel Dudley]

If it is a pole barn, you should set some poles for the door, unless the slab is already poured.

 

[Bill K]

I would use one. Thats a good size span even on the gable end. 75 bucks is cheap insurance.

 

[larrylwill]

Well I started out just wanting a carport, I let a local talk me into building a garage over my old driveway 1/2 cement slab 1/2 asphalt. You can read about the three stooges in the other thread. Anyway I have taken over the job after them putting up the 3 walls of studs 16" on center.
It was intended to cover it with bubble wrap insulation then 29ga tin. Thats the way they build those portable buildings around here except the ground is 14 inches lower on the back. So they started with a wood 4x4 foundation and built the walls on top of that.
They were going to build 2x6 trusses but since I fired them I bought engineered trusses.
The building is 27x21. Now I have the top leveled and replaced the short 2x4's and moved a lot of studs to 16" on center. I also made the opening and put in a double 2x8 header for the a 8x7 roll up door. Now I'm waiting on the trusses and header for the front standard garage door. I ordered a LVL 12" beam fro the door and its 20 ft. So I can either cut it down to 18'6" or use the whole 20ft.

 

[mobetta]

you should have at least 2 jack studs and 2 king studs at each end of a span like that, probably 3 jacks.

the gable end truss is designed to give you a 16" OC framing, set on top of a properly framed wall, not to span the building, or even the GD opening.

it is a fairly large hole in your building, I would not skip a good header. it is holding up the end of your shop, and will keep lateral forces in check when sheeted in properly.

what kind of snow loads?

 

[larrylwill]

No snow I'm in north Alabama. The most we have ever had is 2-3" which lasted 1-3 days.
I was either planning on using 3 jack studs and 2 king studs with a cut beam 18'6" or if I used the whole 20ft, then 2 king studs and 2 jack studs at 20ft then 2 more jack studs at the 18'6" point. Im undecided whether to cut the beam or not.

 

[larrylwill]

I decided I will cut the beam down to 18'9" and use 3 Jack studs and 2 king studs.

 

[larrylwill]

I logged in to ask another question and saw I never finished my saga. I tore down what the contractor (3 stooges) built and started over. I dug out and poured footings where the asphalt was to bolt 4x4 exterior lumber for a footing all around. I built the walls with 2x4's covered with 5/8 chipboard then metal. The roof using engineered trusses and tin. It has a 1ft soffet and 1ft overhang in the front above the door. I built the frame and the wife helped me put on the wood and tin. I had a guy help me with the trusses. I put the contractor (3-stooges) that ripped me off in jail and he was indited by the grand jury, the next day he rolled his truck and killed himself, left this world owing about 50 people money. It cost me $5,000 + the $3,000 I lost to him. Here are a couple of pictures.