Another way of transporting sand and gravel is a dump truck with a trailer. First the truck dumps its own load, then the hopper on the trailer is moved into that of the truck, and it can then dump that one as well. This is a fairly common design, at least in my part of the world.
Migrated from my old blosxom blog, formerly at bill.wards.net/blosxom on 2026-04-24
