lumber

I am needing to find specific information in regards to lumber estimating for residential construction by hand, without the use of estimating software. I have worked for big builders as a site manager, in purchasing and estimating, but I've never had to do complete lumber estimates from plans...

I need to order lumber (birch plywood or equivalent) 2x4. 1x pine etc. for a theatrical scenic project in Italy. Can someone tell me what the standard dimensions are for your basic construction supplies? Thanks for your help.