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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6689
Experience:  Structural Engineer
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I have to hold a 1500 lbs light bar in a house. The bar is

Customer Question

I have to hold a 1500 lbs light bar in a green house. The bar is 64 feet long. I can support the beam every 16 feet. The weight is evenly distributed. How big of an i beam do i need and how big do the columns need to be? Thanks Kevin
Submitted: 1 month ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 month ago.
Hello
Expert:  StructuralEng replied 1 month ago.
I can help
Expert:  StructuralEng replied 1 month ago.
The light bar itself is a full 64 feet long? And weighs a total of 1500 pounds for the entire 64 foot length? Do you feel like you need an I-bea The light bar itself is a full 64 feet long? And weighs a total of 1500 pounds for the entire 64 foot length? Do you want a steel I-beam? Or are you just thinking you need one?
Customer: replied 1 month ago.
I need some structure that the light bar can be supported by. The light bar is attached by cables and moves up and down with a winch.
Expert:  StructuralEng replied 1 month ago.

If you can have posts at 16' on center, you can use wood.

Expert:  StructuralEng replied 1 month ago.

How often is the light bar hung from the beam with the cables?

Customer: replied 1 month ago.
It is anchored every 8 feet. I would rather build a steel structure.
Expert:  StructuralEng replied 1 month ago.
That is fine. I will size a steel beam for you. I only recommend it would because it would be far less expensive.
Expert:  StructuralEng replied 1 month ago.
W4x13 ASTM A992 Gr. 50 Will work well for you. The beam is 4 inches deep by 4 inches wide and weighs 13 pounds per foot. The posts can be a 3 inch nominal schedule 40 pipe ASTM a 500 grade B.
Expert:  StructuralEng replied 1 month ago.
The system will need to be braced laterally
Customer: replied 1 month ago.
Thanks you
Customer: replied 1 month ago.
Thanks I might use 3x3x3/16 wall for columns. I would rather keep square sides to build the bolt surfaces off of. Thanks
Expert:  StructuralEng replied 1 month ago.
That size tube is fine

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