After 7"+ snow fall here in the western suburbs of Chicago, I decided it was finally time to build a bed box to put some sand bags over the rear axel for better traction in the slick stuff.
Mind you mine is a 4x2 Access Cab so all you 4x4 guys bugger off.
I used 2x6 dimensional lumber held together with 3" long construction screws.
My old Mazda bed had pockets for boards for this exact purpose, but my Taco does not, thus the need to build one.
I started with the main runners on either side of the wheel hump in the bed at (2) @ 53" long. Then (2) @ 36-3/16" for the braces between the runners.
Held it together with (3) 3" construction screws in each corner and them filled it with concrete blocks, bags of sand, some old 50# dumbells and 3 bundles of unused shingles. Approx 400# of weight now over the rear axel for better traction.