Here's an old carpenter's trick for carrying long lumber in a pickup truck: Cut a 2x6 brace about 1/8 inch longer than the inside width of the truck bed. Wedge it crosswise under the upper lip of the bed about 1 foot behind the cab. Then leave the tailgate up and slide the long boards into the bed and under the 2x6 brace. The brace will hold them down while they rest on the tailgate. Be sure to tack a bright-red or bright-orange flag onto the trailing end of the lumber to alert other drivers.
Hauling Long Lumber
A safe way to carry boards in a pickup truck