Roof racks have been known to fail at high speeds with lots of updraft so take the extra precaution of tying the roof rack down to the roof of the vehicle as well.
How to tie pipe to roof rack.
Center the pipes so they rest on top of the rack evenly.
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.
Tie down the boards lengthwise and widthwise similar to how you d secure a mattress.
With the cargo on your roof lay the safety strap across the width of your cargo.
If you have side rails and crossbars the straps can be looped around those.
Use ratchet or cam straps to tie the roof rack through the doors not the windows.
The second option is the side racks.
Stack the pipes vertically across the roof rack.
Leaving your rack on all year will increase the price you at the pump.
First loop the strap under the roof rack s crossbar and drape the loose ends over your oblong load i e.
2 take an end of the safety strap and loop it down under a roof bar that runs perpendicular to your vehicle and then back up to the top of the cargo.
Remove your rack when not in use to avoid the added weight drag and noise.
Stack them on top of each other neatly so they won t slide around.
Wrap lumber in a tarp to secure it and place a blanket down on the roof under the load to avoid scratching your vehicle s paint.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
In the case of a naked roof you should be looping the rope through the car through the doors not the windows and around the object on the roof and a towel or blanket should be used to protect the roof of your car from the object.