Conveyor Design Problem

Hi,

This is one of my first design calculations in the workforce and I wanted to ask a couple of questions to hopefully jog my memory on Statics/Strengths and make sure I am on the right path.

I've attached an example of a problem I am working on where we have a scissor lift that will have 10" 2x2 (.090 thick wall) tubing welded on top to support a 10' long conveyor. In my picture, I have taken the maximum loads that could be applied on one side of the beam and what I am trying to determine is the strength my weld needs to be at A and B (which are 24" apart) to prevent my conveyor from collapsing. I also have added a gusset 27.5" from the supports (A & B).

I solved for my forces at A and B but I'm trying to remember how to solve for the reaction at C (ie. the gusset). Also, if I am using 2x2 cubing, what would the strength of the fillet weld be that member could support?

p.s. I know the weights are not anything that would cause any worry on the welded joint but I am asking more to get the process down for future applications where weight and safety may be of higher importance.

Thanks,

Matt

 

[AELLC]

What you have there is a statically indeterminate frame, and attempting to solve it by approximation/determinate methods may not come close to actual forces at all.

The applied loads you show are very small compared to what we normally deal with. A practical method would be to model this into RISA2D, but you may be OK with a continuous beam analyzer, many of which you can download for free in Excel file format.