Adding Plate on I section
Adding Plate on I section
(OP)
We already fabricate an I beam 150x75x14 (tw=5, tf=7).suddenly the client want us to increase the design loads. The solution we came up is to add a plate at the bottom flange. and the thickness of the plate is 9mm. The question is it ok to have a thicker additional plate than the thickness of the flange. or is there any other restriction on adding plate on I beam section. Thank you in advance






RE: Adding Plate on I section
Best regards - Al
RE: Adding Plate on I section
RE: Adding Plate on I section
Dik
RE: Adding Plate on I section
RE: Adding Plate on I section
1) A web that is uniformly-ish compressed rather than flexed with a T/C strain gradient.
2) A top flange that may be strained to a unreasonable degree.
I'd be tempted to design for flexure using elastic capacity.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Adding Plate on I section
RE: Adding Plate on I section
Did you mean Elastic Moment Capacity instead of plastic? See Koot's last response. I'm sure you're familiar with the process for checking the weld since you should have done it when you designed the original built-up beam, but V*Q/(I*b) is a great composite beam equation.
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Adding Plate on I section