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Would a tripled up 2x12 support an 8 foot span on a bearing…

Customer Question

Hi would a tripled...

Hi would a tripled up 2x12 support an 8 foot span on a bearing wall with only 4 truses spaced at 2 foot on center

Tutor's Assistant: Tell me a bit more about what's going on so we can help you best.

We're opening up an exterior wall and are wanting an opening of 8 feet all thats above is an attic with no room for storage

Tutor's Assistant: Is there anything else the Engineer should know before I connect you? Rest assured that they'll be able to help you.

No thats it thank you

Submitted: 3 months ago.Category: Structural Engineering

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2/6/2023

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

Yaw, BSc, Bsc Mechanical Engineering

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Customer reply replied 3 months ago

Ok thank you

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

No, a tripled up 2x12 wouldn't be enough to support an 8-foot span on a bearing wall with only 4 trusses spaced at 2 feet on center.

A span of 8 feet is quite substantial and would likely require more substantial support, such as using a larger dimensioned lumber, adding more trusses, or adding additional beams.

Customer reply replied 3 months ago

What would you recommend for support because there's a bearing wall in the middle of the trusses and the 2 truses are in the middle and the other 2 are at the ends would a 2x6x10 glulamb work

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

It's not possible to accurately determine the suitability of a 2x6x10 glulam beam without more information about the specific load and design requirements of your situation.

The size of the beam and the number of trusses needed to support an 8-foot span can vary greatly depending on a number of factors, including the weight of the floor above, the type of flooring material, the spacing of the trusses, and local building codes.

Customer reply replied 3 months ago

There's no floor above it's just an attic and it's based out of Utah the truses already are there they run east to west and the exterior wall were wanting to open is north to south the truses are 2x4 bottom cord and 2x6 top cord and ther overall truss span is 35' east to westWith a middle bearing wall in the centerthe center pitch is 6' from the bottom cord

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

Understood. For your specific situation, a 2x6x10 glulam beam might be sufficient to support the 8-foot span, as long as it is adequately attached to the trusses and the bearing wall.

The glulam beam would need to be adequately sized to support the weight of the roof and any other loads that will be placed on it.

The center pitch of 6 feet from the bottom cord would provide additional information about the roof structure and could help determine the load that the support beam would need to carry.

Customer reply replied 3 months ago

Would a 12" depth glulam be more ideal

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

A 12-inch depth glulam beam might be more suitable for your specific situation, as it would provide more support than a 2x6 beam.

Customer reply replied 3 months ago

a 6" wide by 12"tall glulam would workJust double checking I understood correctly

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

A 6x12 glulam beam could be suitable for spans up to approximately 10-12 feet.

Customer reply replied 3 months ago

Is an lvl possibly an option if so what size would be ideal, imbjust trying to get some ideas

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

Yes, an LVL (Laminated Veneer Lumber) beam can be an option for supporting the 8-foot span in your situation.

Customer reply replied 3 months ago

What size would workDo you think

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

The size of the LVL beam that would work for your specific situation would depend on a number of factors, including the weight of the roof and any other loads that will be placed on the beam, the spacing of the trusses, and local building codes.

Customer reply replied 3 months ago

Alright thank you for your help I appreciate it

Structural Engineer: Yaw, BSc, Bsc Mechanical Engineering replied 3 months ago

You're welcome!

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