The second option is the side racks.
Tying lumber to roof rack.
Secure it to the roof rack.
Remember to place a distance of about 3 to 3 foot in between.
For plywood i put two 2 x 4 s on the roof rack and place the plywood on top of those to stiffen the plywood otherwise it flops up and down at highway speeds.
In case you have no idea how much weight your plywood sheet is a sheet of inch plywood is approximately 100.
Use a tie down that wraps around the item and the rails.
Ask for help from friends if.
I use 4 hand clamps at the corners to hold the plywood to the 2 x 4 s.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
Not only that but the cost of a roof rack is easily 5 10 times more expensive than a one day truck rental.
Oh and remember to.
For infrequent use though truck rental is a better option.
Then i use the nylon web tie downs i ve got in the photos of below.
It s best to use a thinner piece of rope and go through an open door and then shut the doors on top of it.
If you have an suv and need to haul lumber often a trailer would be a better option than a roof rack.
With anything you plan on tying down you ll need three preferably four solid points of contact stability.