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.
How to secure loads on a roof rack.
Ratchet straps are a cheap and easy way to ensure the highest level of safety when deciding how to secure items on a roof rack.
Another tie down material you should use is netting or a waterproof tarp.
Two equally spaced straps running front to back and two side to side across the load will do the trick for most standard shaped items.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
Step by step instructions step 1 packing step 2 secure everything well.
These items act as another safeguard to keep your items secure and protected.