Effect of Forces on Gantry Cross-Sections?

[WandrinAndy]

Adil's correct that is what I meant in that post. It will be hardly any weaker in the middle over this width but will add far better strength and rigidity to the gantry than 45x45 would in the lateral directions.

Your also correct that I favor the green design but didn't want to get into that in your previous post because it's slight different design.

I don't like box section for gantry's has it can produce resonance and vibration unless thick walled.? The bolted together extrusions are far denser therefore absorb vibrations far better.!! . . .Any resonance will transfer thru to the finish.

Thanks Jazz and apologies for doubting your interpretation Adil. Afraid I still have nagging doubts though about the vertical strength of those sections lying flat like that, and reckon there must be extra sag in the middle when compared to the GREEN design.

Getting back to this thread, how would the design Adil listed compare to the GREEN design in terms of rigidity?

I wonder what size box section Jonathan's gantry is and particularly what wall thickness?