Thanks you Graham , I'm glad someone knows what he's talking about...
I thought it was obvious that the wood is only in place to ride car over steel beams.
ps Eddie you're so wrong and obviously not an engineer...
It was certainly obvious to me what the use of the wood ramps were for...i am an Engineer and also had lots of practice lifting cars, seen lots of them come down when people have been careless on 2 and 4 posters ramps.
It looks simplicstic and economical to build (id rather say cheap and nasty) no malice intended

i personnaly wouldn't lift a Pram on that contraption and i only hope you
a) do not venture underneath
b) drop a beautiful car a bend it.
But each to his own, good luck