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I am working on a project where I have an I-Beam supporting a cantilevered load.

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For ease of fabrication, I need change the cross section of this I-beam.

Due to other limitations:

1. I cannot increase the web thickness.

2. I cannot increase the I-beam height.

My options are to :

1. Increase the upper flange width.

2. Increase the lower flange width.

3. Increase the upper flange thickness.

4. Increase the lower flange thickness.

In order of their benefit, which of those four parameters, if increased in equal amounts, will help to minimize the beam deflection while under load?

I was not sure if there are general rules of thumb to apply here or If I actually need to determine the Moment of Inertia for each proposed cross section to carry out the beam deflection calculations.

Thanks!

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# I-Beam deflection

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