its easy measure length of building your jumping, measure that back from the building mark the floor measure height of building multiplied by 1.8 work out angle from that length of ramp would have to be half the distance measured back minus half the distance of the height.and you would need to hit the ramp at 36.746 mph to clear it or 35.249 to land on roof going over 36.746 will break your car and use lipos with a nitro rocket pack next to it.it would look so much cooler trying to jump it but hitting the shop front.</p>

and def video it</p>

if that doesn`t work at least you`d have a cool vid</p>