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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6682
Experience:  Structural Engineer
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I am constructing a pedestrian/foot bridge across a dry

Customer Question

I am constructing a pedestrian/foot bridge across a dry creek bed, I have a span of 33 feet and 1000lbs. load. I am trying to figure out what size beam I need for this project. Please advise. Thank you
Submitted: 4 months ago.
Category: Structural Engineering
Expert:  StructuralEng replied 4 months ago.
Hello
Expert:  StructuralEng replied 4 months ago.
I can help
Customer: replied 4 months ago.
hello. i'm not sure if you received my question
Expert:  StructuralEng replied 4 months ago.
1000 pounds as a concentrated load?
Customer: replied 4 months ago.
Customer: replied 4 months ago.
i can send an illustration of the bridge if that helps
Customer: replied 4 months ago.
hello
Expert:  StructuralEng replied 4 months ago.
How wide will the bridge be? What kind of decking do you want to use? It will need to be designed for a minimum uniform load in accordance with the building code
Customer: replied 4 months ago.
we will be using ipea. It's in the country, no permits. The bases are on each bank with a 34' long span. Laying a wooden deck on top for walkway, and adding light metal pipes for handrail.
Expert:  StructuralEng replied 4 months ago.
How wide is the bridge? Not how long.
Expert:  StructuralEng replied 4 months ago.
I understand there may not be a building code. But if I were to tell you to use a beam for 1000 pound load and it were to fail that would be irresponsible on my part to not size the beam for the code required loading.
Customer: replied 4 months ago.
My apologies, it would be 36" wide
Customer: replied 4 months ago.
i understand
Expert:  StructuralEng replied 4 months ago.
No problem. Give me a few minutes to run some numbers.
Expert:  StructuralEng replied 4 months ago.
You can pay plan for a W12x26 ASTM a 992 gr. 50 steel. You will need to detail the decking to brace the top flange against lateral torsional buckling
Expert:  StructuralEng replied 4 months ago.

Do you have any other questions for me on this topic? If you could rate my answer, I would appreciate it.

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