I would lay sheets of plywood on these bars and then use a c clamp at the end of each 2x4 to clamp the plywood to the 2x4 s.
Transporting plywood on roof rack.
Second trip 16 2 x4 x6 boards on my roof rack.
4 web ratchet straps in a pair of x formations to hold down the board to the cross bars.
My car with roof rack with cross bars installed.
Out of the choices of cheep quick and good you usually only get to pick two.
When i had a car with thule racks i set up 2 4 foot 2x4 s that bolted flat on top of the cross bars.
As an alternative to tying you could attach these with duct tape.
In case you have no idea how much weight your plywood sheet is a sheet of inch plywood is approximately 100.
Rusticdavid woodworklessons woodworkingforbeginners david shows how to tie wood boards and sheets of plywood safely and securely to your cars roof rack dav.
Ask for help from friends if.
Hauled a lot of plywood that way even put longer 2x4 s on once and carried a 10 foot wide garage door.
The method you use to secure the lumber will depend on what kind of roof rack you have.
Place two 8 foot long 2 4 pieces of dimensional lumber on the roof rack lengthwise.
A pair of 20 web ratchets used as a fail safe in case the board slides to the rear of the vehicle.
Be sure to use straps that are at least 10 cm 4 inches wide to improve cargo stability and decrease the odds of breakage.
This project satisfies all three goals of most of my projects.
Run the remaining three ratchet straps from one side of the roof rack to the other over the plywood sheets.
Tighten each ratchet strap to secure the plywood.
Secure the 2 4 s to the roof rack by tying it to the front and rear crossbeams.
Drywall and plywood cartop carrier roof rack.
Oh and remember to.
My car with 4 x8 mdf board on the roof rack.
I transport 4x8 plywood on my roof racks i usually run a couple of 2x4s under the roof racks the full length of the ply and strap to those at the front and back as well as strapping to the actual roof racks.
I needed to lug home some 1 2 sheets of fragile yet flexible 4 by 8 drywall with only my honda civic.
There should be a 3 to 3 foot span between the 2 x 4 s.
On a roof rack step 1.
Remember to place a distance of about 3 to 3 foot in between.
Makes it a lot harder for the winds to lift it up.
Secure it to the roof rack.