Chassis Steel Wall Thickness

[andysredmini]

Hi
I am just starting to build my chassis using offcuts of box section from work.
Will it be ok to use 2.5mm wall instead of the 1.6mm in the book?. I know that the chassis will weigh more but this is outweighed by the fact that the offcuts are free.
Im hoping to get most of the steel from the scrap bins at work in the locost spirit! we have a good selection of plate and flat steel for the other parts though.

Regards

Andy