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StructuralEng, Consultant

Category: Structural Engineering

Satisfied Customers: 6687

Experience: Structural Engineer

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Building a deck off of a second story bedroom 20 feet wide.

Customer Question

Building a deck off of a second story bedroom 20 feet wide. Owners only want corner Support. My proposal is a footing 30 inches square and 18 inches deep at grade with a mounting bracket, 6 by 6 posts and a6 by 14 beam between the posts. 2 X 12 joists from the ledger board on the wall to the beam 24 on center covered with 2x6 treated lumber + railing. Will that meet engineering calculations? If not, what would you change?

Got a "response " but nothing except "hello". Need your professional opinion on my proposal. If it is viable I'll need the calculations. Pls let me know that expense too Thanks, Larry.(###) ###-####

Beam . Would be Douglas fir material grade 2. The deck is 8 feet deep. So the entire deck is 8 by 20 surface material would be treated 2x sixes railings we can take care of

So you need calculations for the beam only? I can offer that to you as an additional service. I will submit the offer now. If you accept I will post the calculations within 2 hours of you accepting.

I need a full set of calculations. Starting with the foundation, its size, and required hardware to hook up the 6 by 6 post, then the bean calculations, then the joists whet her they would need to be 24 on center or 16 on center or 12 on center.

Customer:replied 11 months ago.

The original design included a ground beam for seismic stability. A friend who is a General Contractor said that it was a massive over build, and suggested I get another opinion. He is the one who specified the footings, and 6x6 posts, for which I need a confirmation that these will support the deck (no roofing, just an open deck.)

Location is Coronado, CA. No geotechnical investigation . A friend who is a retired architect from LA drew the plans and over engineered them to be sure they went through plan approval.. I will look forward to your new offer to get all the calculations thank you

I will include a seismic load analysis. Calculations for the footings, posts, beams, and joists. Is there anything else for which you need the calculations?

I'm not an expert in the calculations so looking to you to tell me what else I might need. I wouldn't like to have the metal called out for the Simpson post holders and post to being Saddles. Thanks

Customer:replied 11 months ago.

That should have been "I would " and "post to beam"

I believe what I've stated will be enough. I will submit the offer for the stated calculations. If you accept the offer, it will take a few days to put them all together.