Tony Bryer wrote:
On Thu, 20 Sep 2007 20:33:51 GMT The Medway Handyman wrote :
Remember the depth cubed factor though - 6" is more than 3 times
stiffer than 4"

I didn't know that - where could I find out more?

Strength is proportional to Z = BD^2/6 for a rectangular section

Stiffness is proportional to I = BD^3/12

Ok great, so what do Z, B, D & I stand for?


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257