Garage Door, Man Door, and Window Header

[mauromj]

I am constructing my first building (40x60 shop, 2x6 construction, 16" OC). Since I am new to this, I have questions on load bearing headers (on the eave end of trusses).
I live in Washington State. Everything I can find, states a minimum of 2 trimmer (jack) studs per header end, a header that is at least 9" longer then your opening.

 

[mauromj]

I have drawn up the following front wall. Can anyone help confirm is these headers/framing methods meet WA code? I will be framing this myself and do not want to run into any major issues when it comes time to sign off.

https://pdfhost.io/v/u5r0MyFQz_Sheet1_1

You may need to rotate/zoom...

 

[Mac Moonfire]

Hi mauromj,
welcome to the forum
I do not have the answer for Washington, but will attempt an answer from the minimum British Columbia code requirements.
looking forward to seeing the other answers.

 

[ICE]

Where I worked there was a requirement to double the king studs on any opening over six feet. As a practical matter I always doubled the king studs on any heavy man door. Of course you are framing with 2"X6" studs but force of habit and all. What seismic zone are you in?

I took the liberty of adding the drawing to your post.

 

[mauromj]

Where I worked there was a requirement to double the king studs on any opening over six feet. As a practical matter I always doubled the king studs on any heavy man door. Of course you are framing with 2"X6" studs but force of habit and all. What seismic zone are you in?

I took the liberty of adding the drawing to your post.

Thanks ICE. I appreciate the edit and the response.

It appears I am in seismic design category b. I found this information at the following website. I am in Whitman County (bottom right corner of WA).

https://www.dnr.wa.gov/programs-and-services/geology/geologic-hazards/geologic-hazard-maps#seismic-design-categories

 

[mauromj]

My biggest concern at this point is the headers. From what I have heard on here by many, is that some states require an engineer stamp on garage door headers that act as a load bearing wall. I have stamped trusses, and documentation on the header, but no engineered design.

 

[Jay Smith]

What’s the laminated beam capacity in plf?

 

[bill1952]

Is this an accessory structure to a one or two family dwelling?

 

[mauromj]

What’s the laminated beam capacity in plf?

Here is the table from the manufacturer: https://rosboro.com/wp-content/uploads/2017/09/2019-03-Rosboro-X-Beam_Guide-FNL_a_Print.pdf

And some notes from it:
1. Applicable to simply-supported beam with sufficient bracing to avoid lateral buckling (CL = 1.0).
2. Applicable to dry-use service conditions (CM = 1.0).
3. Tabulated live load (LL) is based on the deflection criterion of span/240.
4. Tabulated total load (TL) is based on the deflection criterion of span/180.
5. Tabulated total load (TL) is in addition to beam weight (assumed 35 pcf).
6. Selected beam size shall satisfy both live load and total load.
7. "--" indicates the allowable load is smaller than 40 plf.
8. Blank live load indicates the live load is greater than the toal load.
9. Bearing "BRG" is in inches and is calculated based on the total load including the beam weight.

 

[mauromj]

Is this an accessory structure to a one or two family dwelling?

Yes, this will be a separate second structure. 1 House on the property already, and this will simply store the toys. No living quarters in it.

 

[Jay Smith]

Here is the table from the manufacturer: https://rosboro.com/wp-content/uploads/2017/09/2019-03-Rosboro-X-Beam_Guide-FNL_a_Print.pdf

And some notes from it:
1. Applicable to simply-supported beam with sufficient bracing to avoid lateral buckling (CL = 1.0).
2. Applicable to dry-use service conditions (CM = 1.0).
3. Tabulated live load (LL) is based on the deflection criterion of span/240.
4. Tabulated total load (TL) is based on the deflection criterion of span/180.
5. Tabulated total load (TL) is in addition to beam weight (assumed 35 pcf).
6. Selected beam size shall satisfy both live load and total load.
7. "--" indicates the allowable load is smaller than 40 plf.
8. Blank live load indicates the live load is greater than the toal load.
9. Bearing "BRG" is in inches and is calculated based on the total load including the beam weight.

I‘m not an engineer, but I figured you’d have at least 800 TL (plf). 20 psf DL plus 20 psf LL for 20 ft (half the width of the roof), plus a little wall load.

 

[classicT]

Are you using portal frames? The headers are likely going to be a minimum 3-1/2"x11" net dimension given what appears to be the portal frames. You really do not have enough panel width near the windows to use any other method.

Would really need to see a full plan to answer more about the brace wall design though....

 

[classicT]

FIGURE R602.10.6.2
METHOD PFH—PORTAL FRAME WITH HOLD-DOWNS



FIGURE R602.10.6.3
METHOD PFG—PORTAL FRAME AT GARAGE DOOR OPENINGS IN SEISMIC DESIGN CATEGORIES A, B AND C​

 

[bill1952]

I agree classic T, the lateral bracing seems more the problem than bearing, J Smith observation probably pointing to 13 1/2" deep lvl. I would expect single king stud is fine (local amendments to IRC may disagree) though the extra full height stud may make it easier to build and tip up in three sections.