Dave Liquorice wrote:
On Sun, 12 Nov 2006 23:53:25 -0000, Alex wrote:

40 years in the trade ,have seen some crap building but never seen a
4x2 floor joist,loft joist yes , floor would be like a spring board and
over 70 years would expect it to fail by now

Depends a bit on the spacing and the tickness of the, not doubt, real
floor boards attached to the top. 4x2 at 9" spacing with good solid 1"
thick T&G floorboards, double angle nailed at every crossing would make a
fairly firm floor.

4x2 at modern 18" spacing with thick cornflake packet sheets for flooring
attached on an 18" grid would be just a tad springy... B-)


Ah. I have 8x2 oak on its SIDE here..and yes, over 3 meters its springy
all right.