Steel Decking Design
Steel Decking Design
(OP)
Help! I am not experienced in designing floor systems using steel decking.
The floor decking will span 5' maximum and will not have a concrete overlay. I will have a 2/3" steel plate covering the decking, but it will not be attached sufficiently to comprise a composite system.
My primary live loading will be from a 13,000lb forklift. With this kind of decking how would you apply the forklift load? Would it be more of a point load over each individual wheel, or applied over the area of the forklift?
How do you calculate web crippling in a steel deck that doesn't have a concrete overlay? I have found several examples using concrete, but none without.
Any help would be greatly appreciated!
The floor decking will span 5' maximum and will not have a concrete overlay. I will have a 2/3" steel plate covering the decking, but it will not be attached sufficiently to comprise a composite system.
My primary live loading will be from a 13,000lb forklift. With this kind of decking how would you apply the forklift load? Would it be more of a point load over each individual wheel, or applied over the area of the forklift?
How do you calculate web crippling in a steel deck that doesn't have a concrete overlay? I have found several examples using concrete, but none without.
Any help would be greatly appreciated!
RE: Steel Decking Design
I did one spreadsheet for deck design and have also at least one worksheets in Mathcad dealing with deck-only designs...AISI I have seen somewhere (maybe the Mathsoft's site itself) makes available mathcad worksheets with which you should be able to deal with any crippling situation at hand.
Respect analysis, and in lack of previous experience I would deal with the forklift load both as area load and wheel loads, since the deck is prone to crippling being relatively thin.
RE: Steel Decking Design
USD publishes some web crippling/maximum deck point load information. It is usually on the inside cover of Modern Steel in the US. In fact is in the latest MS.
Secondly I would ask a question of why are you putting deck, which is not very strong under the steel plate. I would say that the deck does not add anything to your system, so I would just bear the plates on beams.
There's my 2cents
RE: Steel Decking Design
www.njb-united.com/usd.htm
I would be very careful about allowing such a heavy forklift on a metal deck even with the plate cover. A forklift also loads floors with impact and local crippling/buckling of a deck flange can be devastating. Why no concrete?
RE: Steel Decking Design
I know that the use of steel decking sounds a bit strange for the application, but I wasn't given a choice about the floor structure. I was just told to find a decking product and make it work. The company I work for provides great latitude to the scientists to specify exactly what they want, and leaves it to us structurals to make it happen (no matter how infeasible it is).
Again, thank you for your help.