Plans for Hydraulic ramps?

[remote]

Does anyone have any plans or diagrams or pics to fabricate hydraulic ramps, for a 36 ft tandem trailer? The trailer has a dovetail or slope although I dont know the degree on the back. I am also interested in adding hydraulic jackstands and would appreciate any pics ,diagrams, etc. I have noticed that the larger dropdeck trailers that haul large heavy equipment usually have the shape of 1/2 of an enlongated diamond and the hydraulic cylinders appear to be the only thing that keeps the ramps from flexing while loading and unloading. I have also seen conventional ramps rigged with hydraulic cylinders also. Any thoughts,pics,info appreciated.

[88beast]

well it depends on the loads if its all light then id fab somin easy up if heavy id go all out
if its the thihgs in your sig id do 1/2 inch 4x4 angle with I beams and bracing but i have access to auto cadd so if you will want bluebrints or something pm me with dimmentions
ill need deck height at mounting point
slope of dovetail (should be same as ramps) but also if different slope of ramps when on level ground
helght of deck

length of cylinder youll be using

distance from mounting point of cylinder at frame to cylinder at ramp

[LMJD]

.....shape of 1/2 of an enlongated diamond and the hydraulic cylinders appear to be the only thing that keeps the ramps from flexing while loading and unloading.

Duh, took me a minute, but I know of the type you're talking about. An easier design to fab up might be the type that's a "non-jointed" ramp and the hyd cyl just raises the ramp straight upright during travel, and when loading, lowers the ramp to the ground. I drove a lo-bed semi for a number of years and it had that type. Seems like the unextended cylinders were maybe 2 1/2' long. What powered the two rams was a DynaMite (brand name) unit which is a self contained small hydraulic unit powered electrically by what looks like a starter motor which is mounted to the end it's small hyd tank. They're the type used for raising/reversing snow plows on trucks that don't have a PTO driven hyd pump setup. It worked real well on the real heavy ramps. The tricky part would be figuring out your correct ram mounting points so they went up and down smoothly. To bad you can't find one around to copy the exact design and measurements.