ive just been a demolition and reclaim yard and they have got 4-5 new sheets of what looks like galv steel about 1-1.5 mm thick and they are about a meter square would this be any good for the 7 floor?

Sounds perfect

yes; beware that welding galvanised steel is very bad for your health - its the zinc.

Mmmmm, nice avatar 02GF74

drilled and riveted will be fine though

brill ill go get it oh yeah he said its £4.50 a piece is that a good price or about right

eta
i aint planning on welding it on just riviting it so thats fine

[Edited on 11/5/09 by adam1985]

think you'd pay a lot more for new steel from somewhere like metal supermarkets. sounds like a good deal to me

Is it corrugated?

you seen the weight of that stuff? and dont forget nasty fumes if you have to cut it with an angry grinder as well

no its not coragated i picked it up and it didnt feel to heavy

1 to 1.6mm won't be too heavy, it's what was recommended in the original book.

Beware of the 'boing' effect though

£4.50 per m^2 is cheap.