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What Size Beam Do I Need For a 12 Foot Span With Lap Joined

 

Customer Question

What Size Beam Do I Need For a 12 Foot Span With Lap Joined 10 Foot Second Floor 2"x8" Joists Eithe Side, Spaced @ 16" Centers. I Have A Load Bearing Wall I Want to Remove That Has 3 Air Ducts and 3 Water and Drain Pipes Inside. I Am Thinking Using 2 Each 2"x10" With 2"x6" Spacers Nailed In Between at 16" Centers, This Would Alow Me To Leave the Upper Section of the Pipes in the Same Place, Snake Them Out Into A Boxed In Bulkhead Beside the Beam, Then Run Them Past the End Posts (Double 2"x6") Then Down Into The Basement Ceiling Below. What Are The Pro and Cons Of Using LVL's Verses Solid Lumber????

 



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Submitted: 291 days and 7 hours ago.
Category: Structural Engineering
Value: CA$30
Status: CLOSED

Accepted Answer

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Expert:  StructuralEng replied 291 days and 7 hours ago.


StructuralEng :

Hi, I can help.

Let me read closer

StructuralEng :

Before we get started I’d like to point out that a Professional
Engineer’s standard of care typically includes a site visit to assess field
conditions and get an overall understanding of the structure. This can
obviously not be accomplished through the internet. The information
provided here is meant for informational purposes only (general sizing and
budgeting) and is based on the information provided by you. The
information should be verified by a professional engineer who can visit the
site to ensure that potentially important information has not been overlooked
or omitted.

StructuralEng :

Can you verify that it's supporting a single floor only?

Customer :
I am in Toronto, Ontario. Are you arround the corner?
StructuralEng :

Around the corner? No, I'm in the U.S.

Customer :
Yes, Second Floor Above, Basement Below, Steel Beam Directly Below Existing Ground Floor Load Bearing Wall I want to Remove
StructuralEng :

Ok, give me a few minutes to run some numbers

StructuralEng :

A double 2x10 is not even close. You really need a triple 2x12 Southern Pine No. 2

StructuralEng :

If you've found my answer helpful, please click the green
"accept" button. I'll be happy to answer additional questions
on the topic. If you could provide feedback, I would appreciate it.

Customer :
OK, What If I Space One of the Tripple 2x12's Apart from the other Two 2x12's with 2x6's @ 16" Centers in a Ladder Style Structure to Provide Spaces for the Pipes to Pass Vertically Through the the Beam??
StructuralEng :

That will only work if the joists above bear on top of the beams, not if they come into the side.

Customer :
Yes the Joists Bear On Top Of the Beam
Customer :
StructuralEng :

Then, yes, that will work. Just make sure the joists are long enough to bear on all three 2x12's

Customer :

Expert TypeConsultant
Category: Structural Engineering
Pos. Feedback: 96.8 %
Accepts: 2306
Answered: 6/26/2012

Experience: Structural Engineer

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