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What size beam is required for 30ft span with full load for…

Customer Question
What size beam...

What size beam is required for 30ft span with full load for 2nd floor bedroom without using supporting posts?

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

30 ft span with 4X8 supporting posts supporting each end with 2x12 floor joists 20' long. Open space below, bedroom above

Tutor's Assistant: Is there anything else the Structural Engineer should be aware of?

Not at this time

Submitted: 7 months ago.Category: Structural Engineering
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Answered in 35 minutes by:
11/25/2017
Structural Engineer: StructuralEng, Consultant replied 7 months ago
StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7,716
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Structural Engineer: StructuralEng, Consultant replied 7 months ago
Are the joists 20 feet long on each side of the beam? Or 10 feet long on each side of the beam?
Will it support any ceramic tile?
Will support the second floor only or an attic, too?
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Customer reply replied 7 months ago
20 ft from beam to outer wall which is supported by 2x6 wall
Customer reply replied 7 months ago
Flooring will be wood fame with plywood and carpet, no ceramic tile. Bedroom and some storage area only. No bathroom or other major weight items.
Structural Engineer: StructuralEng, Consultant replied 7 months ago

So It is supporting joists from one side only?

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Structural Engineer: StructuralEng, Consultant replied 7 months ago

You will need four 1.75" x 18" 2.0E LVL

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Customer reply replied 7 months ago
What you provided is not a beam size. The question is what size beam will support one side of a 30ft span supporting 20' long 2x12 for second level flooring without center posts to support span. There will be 4x8 posts supporting each end of the 30 ft beam.
Structural Engineer: StructuralEng, Consultant replied 7 months ago

That is a beam size. That's a beam that will span 30' supporting 20' joists from one side only.

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