loft conversion and fitch beam

[chrisv929]

hi guys this is my 1st post . im looking into the poserbilerty of a loft conversion to our house the loft mesures 18ft wide and due to a mass of over head wires out side craneing in a stell rsj is a no go so am looking into fitch beams has any one got any advice on them size ect ect ?

 

[ryme64]

yes. etc. etc.

 

[freddiemercurystwin]

Steel beams, if they are required, can easily be constructed as 3 or 4 separate more manageable beams and manhandled into the loft and then bolted together to make 1 continuous beam.

http://www.totalsteels.co.uk/Spliced-Beams.htm

 

[stuartturbo]

My loft design has passed regs using wood beam not sure on size a structural eng has plans currently.
Can be a bit harder work to pass as apparently there have standard RSJ calc where as timber is more involved
my new joists will come off current wall plates then built from there
and no party wall act to worry about

 

[^woody^]

18' long bits of 9x3 and wobbly 15mm plate is just as awkward to get into a loft and then bolt together

 

[stuartturbo]

no plates just timber apparently, but not seen final drawings after passed off.
only issue i was aware off was the gallows bracket for the chimney stack due to being out off standard criteria for a gallows.

 

[chrisv929]

thanx for the help guys just looked at a friends loft and hes got 3 12x2s bolted togather with a steal plate (fich) in the middle hes is spaning 17ft 9inch and it seams rock solid .... and hes useing 9x2 floor joists to span 15ft to once again the floor is rock soild .... im skiming it for him over the next 2 weekends so if its bouncing all over the place ill find out then.