No. 20 I-beam, span 9 meters, can support the concrete roof?
Give you some suggestions for improvement:The 3 steel girders are spaced at a distance of 3 meters, so you'll have to weld several beams! Increase overall stiffness and prevent deformation.After adding the beam, place the checkered plate, at least 3mm, the plate is welded with the beam and the longitudinal beam, so that the plate will not deform.There is also a border, the border can be 75 angle iron can, so that the overall structure strength, support integrity.
1mm floor slab, top 10mm concrete? The board is too thin. Will there be anything else on the concrete? Without calculation, experience alone can not bear it.
No. 20 I-beam 9 meters span, even without bearing, the naked eye can see the middle bend (waist down).
