## Uniform distributed load at the edge of the top flange on an I-Beam

## Uniform distributed load at the edge of the top flange on an I-Beam

(OP)

Dear all,

There is a uniform distributed load along an I-beam at the edge of the flange, please refer the attachment.

http://files.engineering.com/getfile.aspx?folder=6...

How do I design such an I-beam to resist the line-load?

I would like to know how to determine moment, bearing and shearing resistance at the edge of the top flange on an I-Beam.

I know there are couple of possible failure modes, such as web buckling, which failure mode governs the design?

Thank you for your help!

There is a uniform distributed load along an I-beam at the edge of the flange, please refer the attachment.

http://files.engineering.com/getfile.aspx?folder=6...

How do I design such an I-beam to resist the line-load?

I would like to know how to determine moment, bearing and shearing resistance at the edge of the top flange on an I-Beam.

I know there are couple of possible failure modes, such as web buckling, which failure mode governs the design?

Thank you for your help!

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

Is the situation similar to a torsional load applied to the outside edge of the lip of a ledger support?

More clarification of your problem / load situation is needed.

Jim

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

BA

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

The load is coming at certain degree.

Please refer to the new attachment.

http://files.engineering.com/getfile.aspx?folder=0...

Thank you for your quick reply.

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

Is this structure real or imaginary?

BA

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

I agree with both of you, but we gotta work with what we have. Is there a simple calculation to determine the size of the I beam?

Thanks.

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

You've provided no information. What is the span? What are the boundary conditions? What are your serviceability requirements?

## RE: Uniform distributed load at the edge of the top flange on an I-Beam

Split the problem into 2 separate ones -one with the distributed load acting in line with the web, and calculate usual direct stresses at beam extreme top/bott fibre with M/S.

Second half of the problem is a beam subjected to only the torsion component (torsion per unit length). Use torsion beam equations to determine the maximum applied torsion (similar to shear force diagram), and assume this is resisted by only the beam flanges in horizontal bending. This is another M/S calculation but only use the flange area to calculate S. This gives you a second component of direct stress that you add to the first.

Compare the sum of these stresses with an allowable, making sure that your allowable includes reductions for lateral/torsional buckling if applicable.

Maybe not THAT simple, but this is the usually accepted method.

tg