I need to put in a steel beem to support the new floor in a loft conversion. The beam will need to span across the middle of the flat, half way between the front and back walls, as the existing loadbearing wall that currently takes the weight, may not take the extra load! The ends of the steel will be supported on the 9" solid brick party walls. The problem I have is physically getting a heavy steel beam up the stairs, and swung around into position. Can it be done in two halves, and welded or plated together? Any advice will be welcome.
the reason i'm asking for the joist length is I have undertaken loft conversions without the need for steelwork in fact now as a 'cad' technician recommend and use metal web joists that easily pass 'lbco' approval a recent one was approx. 8 metres span from wallplate to wallplate, they were only 250mm deep at a cost of £85 each, these sit 150mm above the existing ceiling boarded out with 25mm t&g soundproof iboard with 150mm insulation suspended on mesh one man job simples