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.
How to tie lumber to a roof rack.
Ask for help from friends if the sheet is too.
Ideally you ll have some kind of roof racks to tie things onto.
Improper tie down practices are all too common and many accidents and injuries happen because someone didn t take their time loading cargo on the roof of the car.
Then i use the nylon web tie downs i ve got in the photos of below.
Learn how to safely secure items to your car s roof racks.
Tie down the boards lengthwise and widthwise similar to how you d secure a mattress.
Bring your own tie downs.
Wood says side rails and crossbars are ideal but you can move whatever you you need to without them.
My car with 4 x8 mdf board on the roof rack.
It s important to use the right tie downs and place the item correctly on the roof rack if you want to avoid damaging your cargo or causing an accident.
Load your sheet of plywood on the roof rack.
4 web ratchet straps in a pair of x formations to hold down the board to the cross bars.
But once you hit the road turn encounter bumps and dips or slow down inertia multiplies the weight of your load by four to five times.
My car with roof rack with cross bars installed.
Oh and remember to prepare two other pieces of wood for later use.
Secure it to the roof rack.
For plywood i put two 2 x 4 s on the roof rack and place the plywood on top of those to stiffen the plywood otherwise it flops up and down at highway speeds.
I use 4 hand clamps at the corners to hold the plywood to the 2 x 4 s.
A roof rack s load rating is based on a static load the weight of the load when the vehicle isn t moving.
Sporting equipment when it comes to sporting goods it s worthwhile to invest in custom built roof equipment leanse says like a dedicated rack for bicycles snowboards kayaks or surfboards.
A pair of 20 web ratchets used as a fail safe in case the board slides to the rear of the vehicle.
Remember to place a distance of about 3 to 3 foot in between.
By using proper methods you can haul your cargo safely to your destination.
Racv s ernest litera shares some practical tips on roof rack safety loading.
Second trip 16 2 x4 x6 boards on my roof rack.