Calculating deflection of simply supported sheet metal
Calculating deflection of simply supported sheet metal
(OP)
Hi,
I'm a little rusty and I'm trying to figure out how to correctly determine the correct thickness of sheet metal to use on custom concrete formwork. For example purposes, lets say my supports are 12" o.c and I'm looking at a UDL of 1000 psf. I'm using 3mm sheet metal (11 gauge I believe).
Is there a simple formula for determining this? I've searched for a while and it seams it may not be straight forward.
Thanks for any help in advance.
I'm a little rusty and I'm trying to figure out how to correctly determine the correct thickness of sheet metal to use on custom concrete formwork. For example purposes, lets say my supports are 12" o.c and I'm looking at a UDL of 1000 psf. I'm using 3mm sheet metal (11 gauge I believe).
Is there a simple formula for determining this? I've searched for a while and it seams it may not be straight forward.
Thanks for any help in advance.






RE: Calculating deflection of simply supported sheet metal
YOu might discuss this with a checker plate supplier or someone of that ilk and get an idea of how they implement in-plane stresses.
Dik
RE: Calculating deflection of simply supported sheet metal
You might want to look at this link it may help you get an approximate answer:-
http://www
desertfox
RE: Calculating deflection of simply supported sheet metal
BA
RE: Calculating deflection of simply supported sheet metal
The two major US steel form manufacturers use 3/16" skin material with supports at 12" c/c and their systems are rated at 1,500 psf. I would consider the life expectancy that you're trying to achieve (if any) - steel forms suffer from more abuse simply by virtue of the fact they're made of steel. You need to consider connections as well - will the welds affect the surface of your form facing? And then there's the reconditioning after being used & abused - your 1/8" skin will be more easily 'stretched' and more difficult to recondition back to a flat surface.
Ralph
Structures Consulting
Northeast USA