My need was to have some good car ramps for maintenance and change of parts (like exhaust in my case). I saw "commercial" model in ebay and amazon, I see too many chinese copy not well made, light weight and bad welded, rated from 1 to 2 ton each, with very thin profile as brace. Got a friend that buyed this type of ramp, He did some modification, tended to strengthen the body. I think that it's better to plentiful when your body is under a low car, not?
I Buyed this afternoon 42kg of 30x30mm thick 2mm, and angular 30mm thick 3mm, I cut some rods today, tomorrow I have to cut small parts. Hope that 100 electrode (1,6 2,5 mm) suffice to finish the job, I want to weld all the sides.
I'll draw some paper with accurate measurements, total lenght is 120cm, 30cm high, 30cm wide
Hope in few days to complete 2 ramps