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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7270
Experience:  Structural Engineer
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The span is 12', it is a loading bearing wall on the main

Customer Question

The span is 12' long, it is a loading bearing wall on the main floor of a two story house, what the size of the beam I should pick?
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.

Hello

Expert:  StructuralEng replied 1 year ago.

I can help

Expert:  StructuralEng replied 1 year ago.

What is the joist length on each side of the beam? Will it support any ceramic tile? Do you wNt wood or steel?

Customer: replied 1 year ago.
One side is 11feet long, the other side is 16'
Expert:  StructuralEng replied 1 year ago.

Supporting the second floor and attic? Will it support any ceramic tile?

Customer: replied 1 year ago.
it is on main, supports second and attic, no ceramic
Customer: replied 1 year ago.
What is the size of beam and how many?(sistering)
Expert:  StructuralEng replied 1 year ago.

You can plan for a 5.25" X 11.875" 2.0E LVL

Expert:  StructuralEng replied 1 year ago.

That will work for strength and limit deflection to about L/360

Customer: replied 1 year ago.
I dont get it, I ever seen that stuff in community Centre but please don't make it complicated, it is a residential house, I want use 2x10, or 2x12
Customer: replied 1 year ago.
I'm not an expert, don't pour professional terms on me. That won't resolve the issue, I prefer plain words. Thanks
Customer: replied 1 year ago.
If I know that term or abbreviation I would figure out myself.
Expert:  StructuralEng replied 1 year ago.

You can't use dimension liner for this application. It's not strong enoigh

Expert:  StructuralEng replied 1 year ago.

LVL is engineered lumber. The dimensions are 5.25" wide X 11.875" deep. 2.0E is the stress grade

Expert:  StructuralEng replied 1 year ago.

You would need 9 - 2x12 Doug-Fir no. 2. That's not practical

Expert:  StructuralEng replied 1 year ago.

LVL are commonly used in residential construction

Customer: replied 1 year ago.
I'm not satisfied with your answer
Expert:  StructuralEng replied 1 year ago.

Based upon what exactly?

Expert:  StructuralEng replied 1 year ago.

I'm sorry you clearly don't like the answer, but the numbers are what they are. I can't tell you to use a beam size that doesn't check out. That would irresponsible and unprofessional of me.

Customer: replied 1 year ago.
What if (another wall) the same span, one side joists (10')to be supported, the other side is parallel with the beam, what the size of beam?
Expert:  StructuralEng replied 1 year ago.

Then you could use a triple 2x12 Doug-Fir no. 2

Customer: replied 1 year ago.
What the length of both ends need to be supported by post or column? 6", 7", 8"?
Expert:  StructuralEng replied 1 year ago.

3" minimum, but I would recommend full bearing on the appropriately sized post

Customer: replied 1 year ago.
If three 2x6, that would be 4.5"?
Customer: replied 1 year ago.
What if I don't put the three 2x12 attached, I want 1" or 2" space between, is that ok? Because I need to run wires or cable in the space
Expert:  StructuralEng replied 1 year ago.

They need to be attached along their length to properly share load. Cut 3" strips of 1" plywood to attach at the top and bottom leaving a 1" wide X 5.25" tall gap to run your wires. Or 9" tall strips leaving a 1" x 2.25" gap at the bottom

Customer: replied 1 year ago.
If I attach them all together, do i need to lock them up using regular wood screws? How many along the length of beam? The more the better or don't matter?
Expert:  StructuralEng replied 1 year ago.

No 12 X 3.5" at 8" on center. Stagger them high and low

Customer: replied 1 year ago.
What's that mean? Did get it? The beam is actually 11.5" deep, using 3.5" wood screws, where the screws go?
Expert:  StructuralEng replied 1 year ago.

Into the sides to connect the three 1.5" wide 2x12s

Customer: replied 1 year ago.
Can use long enough bolt and nut to attach them?
Expert:  StructuralEng replied 1 year ago.

You can, but it's not necessary

Customer: replied 1 year ago.
Ok the beam is 11.5 deep or wide, the screws must be located 1.5" from both edges, so there is 8.5" between the two lines of screws along the length of beam? What the distance between the two screws in the line of screws?
Expert:  StructuralEng replied 1 year ago.

a 2X12 IS 1.5" WIDE x 11.25" deep. Therefore, three of them are 4.5" wide x 11.25" deep.

Expert:  StructuralEng replied 1 year ago.

There should be two lines of screws. One top - 2" from the top of the beam and 8" between each screw.

One bottom - 2" from the bottom and 8" between each screw. The two rows should be offset by 4" so that the screws are staggered.

Customer: replied 1 year ago.
we can say it is 4.5" thick all togethet
Expert:  StructuralEng replied 1 year ago.

Correct

Customer: replied 1 year ago.
Ok clear this time.
Customer: replied 1 year ago.
You from California?
Expert:  StructuralEng replied 1 year ago.

No problem. I'm happy to help. Good luck with your project

Expert:  StructuralEng replied 1 year ago.

I am not located in CA

Customer: replied 1 year ago.
Where?
Customer: replied 1 year ago.
I need your professional registration or license # ***** similar # ***** for record
Expert:  StructuralEng replied 1 year ago.

I don't provide personal information over this website

Customer: replied 1 year ago.
Or how could I know who gave this answer?
Expert:  StructuralEng replied 1 year ago.

You can see on my profile page that my license has been verified by a third party. I could not stamp anything for you, even if I were registered in CA because I was not able to visit the site myself to verify the information provided by you. This is not meant to replace an engineer stamping something for you. That's a $500+ proposition.

Customer: replied 1 year ago.
Need someone responsible for this answer
Expert:  StructuralEng replied 1 year ago.

I'm going to opt out now for you. Good luck with your project.

Customer: replied 1 year ago.
I need someone responsible for the answer based on the information provided
Expert:  StructuralEng replied 1 year ago.

The answer is exactly correct. If you want detailed calculations, I'll be happy to provide them as an additional service, but I will not provide any personal information