On Fri, 29 Jun 2018 03:44:04 GMT, Ron
m wrote:

I'm thinking of making a motorcycle ramp 8 ft long & 3 ft wide with 3/4 inch
plywood to load a 600 lb bike on a car hauler trailer. Will the 3/4 " plywood
hold the weight?
The short answer is no.
The longer answer is depends what else you use to make the ramp, and
the engineering you put into it, and how high it needs to be.