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StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7187
Experience:  Structural Engineer
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Here's what I need help with. The basement walls are 16" x

Customer Question

Here's what I need help with. The basement walls are 16" x 8" blocks forming an area 42 feet x 24 feet inside.
The steel beam is a W8x18 resting in the block walls running the long length. I need a 20 foot span from the wall towards the center. There are 2 x 10 floor joists that over lap the beam by about 2" on each side and the beam is set at 11 feet off the side wall. The columns are 3 1/2" in diameter and can not see the footing size because it appears the floor was poured over the footing? There are four columns spaced as follows, from the wall where I want to start my 20 foot span 6'-8", 9'-9", 9'-6", 9'-10" & 7'-2" to the other wall. It's a one story brick ranch built I'd say in the 50's or 60's by the style. What would i need to do to the beam for that span? Or what can I add to the sides of the beam as additional support. Any help would be great.
Thank You !!
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.

Hello. I can help

Expert:  StructuralEng replied 1 year ago.

Can I get back to you in 2-3 hours?

Customer: replied 1 year ago.
2 to 3 hours is ok
Expert:  StructuralEng replied 1 year ago.

Does this beam support the attic in addition to the floor? Is there any ceramic tile?

Expert:  StructuralEng replied 1 year ago.

Is the beam spliced anywhere? If so, where?

Customer: replied 1 year ago.
Thank you !
We double checked and it is a one piece beam (no splice)
There is no tile in the house. As I stated earlier the house is
a ranch, tha area under the roof is 2x8 with a ridge board
no trusses. the attic floor joists do overlap in the center of
the house. So I submise that the beam in the basement
does carry the load from the attic or area above.
Please reply asap. we do have access to a certified welder
if needed.Thanks!
Expert:  StructuralEng replied 1 year ago.

Hello Jerry. Thank you for the additional information.

Expert:  StructuralEng replied 1 year ago.

The beam can't span 20' on its own. I can design a reinforcement scheme for the beam that will allow you to span the 20' as an additional service. This would include the size and type of reinforcement and the weld requirements. I will also size the new footing needed for the additional load at the first post. If you accept the offer, I will provide all information by the end of the weekend.

Customer: replied 1 year ago.
I need to know if you are going to give me all the information to resolve the problem.
I was under the impression thats what the 54 dollars was for. tell me again what
you will supply at my home email***@******.***. unfder the $220 dollars it says
100% satisfaction guaranteed. I feel like your stringing me along. be up front Please.
Expert:  StructuralEng replied 1 year ago.

Yes, that will include all information about reinforcing the existing beam, the new post size and the new footing size. I will include sketches, as needed. The only thing I can't do is comment on the existing footing where the load will increase on the existing basement wall.

Expert:  StructuralEng replied 1 year ago.

Hello. Do you still want help with this?

Customer: replied 1 year ago.
thanks we resolved the problem
Expert:  StructuralEng replied 1 year ago.

Glad to hear it.

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