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.
How to secure luggage to a roof.
Two extending from back to front and two over the sides.
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.
The second option is the side racks.
Use the proper equipment.
Ensure that the cargo doesn t obstruct your view.
Use a tie down that wraps around the item and the rails.
Ensure that the cargo doesn t obstruct your view.
How to tie down luggage on a roof rack step 1.
Strap down your luggage.
Then you can begin organizing the cargo on the roof of your car.
Stack items evenly across the roof and in the center of the doors.
Once done close the bag securely and use roof rack tie down straps to attach it to the luggage rack.
After packing the cargo on top of the car use your tie down materials to secure the load.
Cover the entire load with a tarp or netting to prevent things from falling out.
Safety tips for transporting roof cargo.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
First place smaller items together in a tub or suitcase.
Use at least four straps over bag.
If you have side rails the most important thing is to reduce the amount of drag the item will make by placing the front of it in line with the beginning of the roof or moving it as far back as you can.
Place heavier items on top of lighter items to keep them in place and all items should stay centered between the doors.
In the case of a bare roof you re somewhat limited but in this situation it s ideal to have the object centered with the doors of your car so the bulk of the item is most securely strapped down.
Lighter goes lower place heavier items on top of lighter items.
Fill the bag completely to prevent flapping when the vehicle starts moving.
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.
Choose your carrier there are a two main options for carrying luggage and gear on your roof.