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Timber floor rating with steel plate

Timber floor rating with steel plate

Timber floor rating with steel plate

(OP)
There is a timber floor (3" thick by 6" wide)spanning 8' between support beams.  There is 1" plank flooring running transverse to the 3" timbers.  How do I calculate the available floor loading, accounting for the 1" transverse plank flooring.

I have the same question for a 3"x6" timber floor with 1/4" steel plating on top.  What is the available floor loading.  

I can calculate the available loading of the 3"x6" timber, but not sure how the plank floor and steel plate distributes the load and should be calculated.  I know this definitely increases the available loading.

RE: Timber floor rating with steel plate

There would be a benefit only if the steel plate is sufficiently fastened to the timber to achieve composite action.  I doubt that is the case.  With the planks, the shrinkage gaps between the boards would preclude composite action.  Consider the 1x planks and the steel plate to be just a wearing surface.

RE: Timber floor rating with steel plate

As hokie66 notes, don't consider composite action.  Just take the reactions from the plate and apply to the joists.

RE: Timber floor rating with steel plate

Thirded...

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

RE: Timber floor rating with steel plate

(OP)
Sounds good. It makes the calculations easy too.  Thanks!

RE: Timber floor rating with steel plate

Fourth'd ??

RE: Timber floor rating with steel plate

ill take the fifth

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