Steel size for mezzanine?

[B R C]

Will be putting in a mezzanine accross two back bays of workshop, spanning the whole width. Bays are 4570mm(15') and span is 8800mm. Plan is to have support U beams at sides and one in the middle. Height roughly 2400mm.


My questions are what size main steel(side to side), what size support columns, and what size C-section or possibly wood to span the 4570mm, and spacings(300mm?)

@PDRD

 

[JNP]

what are your going to use the new floor for?

 

[B R C]

That was quick! Purely storage of parts etc so some steel racking will go up but the load will not be huge I guess . At the sides there will only be about 3ft of height as it is 12' to eaves.

 

[JNP]

pm coming your way