Still there is a basic method to follow when tying a mattress to the roof of a car.
How to secure a mattress to a roof rack.
I am going to pickup a queen size mattress and box springs and my dad is going to take the mattress part in his van but the box springs won t fit in his van because they don t bend like a mattress does.
Any item that exceeds the recommended weight limit choose another hauling option like a trailer.
A ratchet strap ensures that the mattress will not flay away while driving especially if you do not have a roof rack.
Secure the front end of the mattress and then the other end of the mattress.
Put the mattress on top of the car and rope so that it goes length wise with the length of the car see pics above.
I would say follow a similar process to what ryan said but i would not recommend using rope.
Before securing the load to the roof of your car evaluate the item you will haul.
With the help of a friend you can quickly and efficiently secure the mattress with a sturdy rope.
Center the mattress in the middle and put the rope over the length of the mattress.
If you purchase a new mattress to take home or are in the process of moving the mattress should be thoroughly tied down to prevent it from flying off the roof of your car and endangering other drivers.
After the mattress is secure in the plastic place the mattress on the roof.
A simple ratchet strap works best.
Secure your mattress to the top of the car.
Prepare to secure your load to the roof rack.
The wind from the roads or highway can easily rip through the plastic if it is not properly secure.
Buy sturdy rope nylon or polyester based.
I am planning to strap the box springs to the roof rack on my rav4 and tie them down with a bunch of rope.
If you do secure your mattress to a roof rack or safely in the bed of a truck strap it down with ratcheting straps.
Ratcheting straps are much less likely to fail when moving a bulky item like a mattress.
Toss the first long piece of rope over the length of the mattress.
Mattresses are large bulky and can pick up resistance from the wind.
Place the mattress on the roof making sure it s in the middle.
This will stress any knot no matter how securely tied.