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walkereng
walkereng, Consultant
Category: Structural Engineering
Satisfied Customers: 2516
Experience:  Over 30 years of Structural Engineering experience.
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I am building a small platform ~5x5ft and 1 ft tall, the

Customer Question

Hello I am building a small platform ~5x5ft and 1 ft tall, the platform will need to hold ~8000lbs because there will be a water tank on it. I was planning on using redwood 2x4s for the frame and cross bracing and 4x4's for the posts. The soil is clay heavy, would 4 pier blocks (10"x10" each) in the corners,~ 4'5" spacing be enough of a footing? Or should I use more, I would like to avoid pouring cement
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.

Hello

Customer: replied 1 year ago.
Would 4 pier blocks be enough?
Customer: replied 1 year ago.
I will be using lag bolts or metal braces to attach the 4x4s to the 2x4s
Expert:  StructuralEng replied 1 year ago.

This will depend a lot on the tank itself. I can review the suitability of the tank and this structure as a premium service. I will submit the offer for you to consider. If you accept, I will ask for information on the tank and then provide member sizes and connections within 2 days

Customer: replied 1 year ago.
No thanks on the structural analysis, please just tell me if four pier blocks can safely support 8000 lbs, or if I should add a couple more. The tank is round and just a hair over 5' in diameter.
Expert:  StructuralEng replied 1 year ago.

I will opt out. This is too haphazard and 'cowboy' to make me feel comfortable.

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