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I’m trying to find out if I can plausibly design a 34,000lbs…

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I’m trying to find out if I can plausibly design a 34,000lbs studio on the house I am building.

Tutor's Assistant: OK. Got it. You've come to the right place. Tell me a bit more about what's going on so we can help you best.

Designing a single story house on a hillside. Foundation is four caissons with grade beams and structure of the house is heavy structural steel with light gauge framing. 32’x40’. I want to place a 16x20 studio on top that weighs 105lbs/sq ft. I want to find out if it’s hypothetically possible to place this without requiring support columns directly to the caissons. In other words, can this load be placed in the middle of a 32’ span?

Tutor's Assistant: Is there anything else important you think the Structural Engineer should know?

House is in Los Angeles (seismic zone)

Submitted: 7 months ago.Category: Structural Engineering
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Answered in 18 minutes by:
12/7/2017
Structural Engineer: StructuralEng, Consultant replied 7 months ago
StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7,716
Experience: Structural Engineer
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Hello. I can help.
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Structural Engineer: StructuralEng, Consultant replied 7 months ago
Anything can be done if it's designed properly. You just have to make sure all the structure is properly sized to support that
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Customer reply replied 7 months ago
It seems like it should be possible. If I were to connect the 2nd fl load directly thru columns to the caissons the columns would go right thru the kitchen and living room, so I wanted to know if it would be possible to have the load rest on a beams that span 32’ across. 35k lbs held up by two 32’ I beams seems like a lot of load esp for a seismic area though. But possible? Would we be looking at 14” beams? (Don’t worry it’s just prelim feasibility right now - I’m not about to go do it)
Structural Engineer: StructuralEng, Consultant replied 7 months ago
You have caissons supporting a house?
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Customer reply replied 7 months ago
It hasn’t been built yet but that’s the plan, four of them. Hillside and loose fill with deep bedrock so four 36” caissons (I guess they are cast in place piles with rebar)
Structural Engineer: StructuralEng, Consultant replied 7 months ago

You don't see 3' diameter caissons for a house very often. I can certainly design what you need here, but I will need to submit a premium service offer. This is much more involved.

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