To determine the maximum load or break strength of the strap multiply the wll by 3.
Strap wood to roof of suv.
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.
Pop the hood and drop in temporary hood straps.
The wll is always one third 1 3 of the maximum load.
Snug the cinch strap just enough to prevent upward movement but not enough to bend the hood.
Use strong rope or straps and make sure the mattress is tied down lengthwise and widthwise keeping the fastenings well centered.
Or ttpransport plywood inside the vehicle.
Cut it down to rough sizes first if full sheets won t fit.
It is recommended that you always use straps in pairs.
Second trip 16 2 x4 x6 boards on my roof rack.
Wood says side rails and crossbars are ideal but you can move whatever you you need to without them.
Take care to keep it clean and dry since you ll be sleeping on it.
My car with roof rack with cross bars installed.
It can be dangerous to drive with objects strapped to the roof of your car especially for the vehicle behind you.
4 web ratchet straps in a pair of x formations to hold down the board to the cross bars.
Install a proper roof rack secure strongly to that without exceeding it s cargo rating consider a leading airfoil and drive slow.
Run a rope or cinch strap through them and over and around the leading edge of the overhanging load.
My car with 4 x8 mdf board on the roof rack.
Next pull the long end of the strap under the crossbar on the.
For example if you are using straps with a wll of 500 lbs each to tie down a 1 000 lb load you need at least 2 straps to safely secure that load.
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.
A 2012 study conducted by the government accountability office found 51 000 crashes occur each year from cars that were struck by improperly secured objects flying off moving cars or that hit highway debris resulting in 10 000 injuries and 440 deaths.
Mist yards have panel saws and will make some number of cuts free or cheap.
Or mount the straps permanently under a fender bolt.