some framing questions

[earthworks]

The garage is 32 x 40 with two 12' doors on the eave entry side and one 8' on the gable end side.

simple one first:

- what is the minimum distance recommended from the corner to the edge of the garage door (12')? I'm thinking id like at least a couple feet so that I can someday put a bench if I want. but if I'm parking in the stall, maybe a bench would be in the way.

now framing questions:

- 12' overhead header is 11 7/8"lvl x 2. how many jack studs and how many king?

- if the doors are 12 x 8 then exactly what dimensions should the rough opening be?

- same questions for the 8' wide overhead door on the gable end

- what size header for 8' door

- what size headers are required for 4' windows and 32" man doors? 2x8 vertical ok?

- how high should the window sill be if I intend to install workbench infront of it?

 

[Cyberbear]

In our area:
4 x 4 = 4' span header for door or window width
4 x 6 = 6' "
4 x 8 = 8' "
and so it goes for larger openings rule of thumb. Some areas require larger if two story above, so check local codes.

 

[Mammyjammer]

I use 4x4 s for jack studs. Always had trouble with lag bolts for garage door tracks hitting right in the middle of two studs nailed together or hitting the very edge of a single jack stud.

 

[RivennHewn]

I'm kind of a fan of Simpson Strongwall or Garage Portal panels for garage door openings.

They provide the shear you need to keep your building upright.

http://www.strongtie.com/products/strongwall/sb/garage-portal.asp?source=swnav

RO for your door will depend on how you plan to trim it out. Ask your supplier or installer what works for your application.

 

[earthworks]

Solid 4x headers? or do you mean 2 4x's together? A carpenter buddy told me today that the common around here is 2x8 over doors or windows up to 6ft. then 2x10 up to 8ft. I've got lvls for the 12ft doors.

I still need to figure out the required number of jack and king studs.

 

[tcianci]

In most areas, any use of engineered lumber requires an engineers stamp. Fortunately, nearly every dealer of engineered lumber has software supplied by the engineered lumber manufacturer that will calculate the size and quantity of engineered headers and specify that on a printout. The printout will also include the bearing area (jack size) required at each end of the span and it will also provide a fastener schedule and placement diagram. So, the place to answer all your questions is your local lumber dealer, not GJ.

Some lumber yards keep an engineer on retainer and this engineer will provide a stamp on the print outs from the engineered lumber manufacturers software.

Some localities will accept the printout from the manufacturers software in lieu of the engineers stamp.

 

[jkwilson]

Are you planning on vehicles using that 8' door? Going to be a tight fit if so.

 

[bczygan]

The most important question of the bunch is about the distance from door opening to corner of building.

And this is important not just for space planning inside.

It is important because that is a shear wall and needs treatment as such.

Do some Google searches:

Prevent this:

With this:

http://www.strongtie.com/products/strongwall/sb/index.asp#

Wider wall sections, properly detailed as shear walls will prevent it.


Size of bearing area for studs acting as support columns to transfer the load from the LVL header beams will be determined by the load being transferred. What are the roof and wall loads on the headers?

Rules of thumb are OK for standard conditions. But then you have to be able to discern the difference between typical conditions and unusual ones. I know a framer that used 2x12's for all headers, just to simplify and give lots of nailing in the wall. Of course that left less room for wiring and insulation.

Bill

 

[earthworks]

Thanks for the shear wall info. wind loads aren't much of an issue here really, but I did like the drawings for the simpson strong walls. I went on amazon and ordered the 24" straps which I will use in the same manner as the diagrams you posted.
I decided to make my short walls on either side and between the 12' overhead doors 32" each. and I'm constructing them with two jack studs and two kingstuds also... which is overkill according to code. also using 1/2" anchor bolts two per short wall.