Jack stand under scissor jack?
Have seen this a few times on seasonal and permanent sites: people put jack stands under OEM scissor jacks on all 4 corners. Wheels removed. Scissor jacks folded up flat, i.e. they are not in "camping...
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Fist off, the cement blocks shown were used wrong. A cement blocks strength is in setting in a normal upright position. And most preferably to have something like a 2X8 board on top to spread load over block.
Also supporting a trailer at all 4 corners would most likely place stress on the frame. I would assume that strength of steel frame is designed to support a maximum load between the axle location and front support point. Not from end to end of trailer. Projection beyond the axle to the back would be considered a cantilever, and about 1/2 the length of the front span.
To support load for the full length of the frame would probably require a structural frame about twice the size.
Also supporting a trailer at all 4 corners would most likely place stress on the frame. I would assume that strength of steel frame is designed to support a maximum load between the axle location and front support point. Not from end to end of trailer. Projection beyond the axle to the back would be considered a cantilever, and about 1/2 the length of the front span.
To support load for the full length of the frame would probably require a structural frame about twice the size.
