My car with 4 x8 mdf board on the roof rack.
Strapping lumber to roof rack.
Then secure the front and back ends of each lumber bundle with ratchet straps to prevent movement photo 1.
Tie the load to the roof racks with nylon straps that have self clinching buckles.
My car with roof rack with cross bars installed.
Which is why we spoke with jonny wood one of yakima s four road warriors who travel around the us educating the masses on how to properly rack up their vehicles and asked for some advice on how to properly secure a load to a car s roof.
Use a tie down that wraps around the item and the rails.
Acquire ropes and straps.
Start by loading dimensional lumber onto the rack with the narrow edges resting on the crossbars.
Next secure the load to the rack using ratchet straps photo 2.
With the third option crossbars with side rails you can secure an item to the side rails and run tie downs from front to back securing them to the crossbars.
That prevents the bundle from sliding forward backward or side to side.
Wood recommends a webbing strap with a fastening buckle that.
4 web ratchet straps in a pair of x formations to hold down the board to the cross bars.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
Thread the strap end through the buckle and pull.
Wrap the strap around the load and under and around each rack.