Cannot see how you can tell the weight of gear 50 boards a ton what if there wet ? Tube every long ive got has a different weight,And as for half backs dont bother they look sore and dont carry the gear you need, your for ever going back to the yard for gear,I got done some years ago i was 19% over and only had a 3 sider on a 7.5 tonner.
18 tonner the way to go its like a mobile yard just a cnut to load and unload.