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Mild Steel Maximum Load

 
 
Uniopp
 
Reply Sat 3 Oct, 2015 07:53 am
I’m going to construct a 6.0 meter long x 3.0 meter wide dismountable single story storeroom that will sit on three steel bearers on my asphalt car park. I have some 6 meter lengths of 3.2mm thick 100mm x 100mm Square Hollow Section Mild Steel Tubes (9.52 kg/m in weight) and I would like to use three of them as the floor bearers (they will be spaced at 1500mm). I will place small concrete blocks under the steel bearers to keep them off the ground by about 50mm. The remainder of the frame will be timber and the wall/roof will be lightweight steel siding/roofing.
Kind of similar to the following photo but wider and with one extra bearer through the middle (probably with no steel cross pieces [unless recommended] and supported with concrete blocks sitting on my asphalt car park).

https://www.dropbox.com/s/5d29kvtrmt3mko1/5QDW-Resized320x240.jpg?dl=0

https://www.dropbox.com/s/9j03gtfjofwv6yz/square.jpg?dl=0

https://www.dropbox.com/s/gwtgdrtd50xfvur/load.jpg?dl=0


1/ What is the maximum load that 3.2mm thick 100mm x 100mm Square Hollow Section Mild Steel Tubes could handle in this situation?

2/ What spacing (under the steel bearers) should I put my concrete blocks?

3/ Would the 3.2mm thick 100mm x 100mm Square Hollow Section Mild Steel Tubes be suitable if I decide to add a second story room on top in the future?

Thank you.
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