The 250 ton load is being applied to the center of a 2" thick plate 60" long and 48" wide by a hydraulic cylinder. The 2" plate has a 12" hole in the middle. I want to weld two I beams lengthwise along the 2" plate (one on each side) with bracing going across between the two I beams. The cylinder will set between the I beams.I would want no more than approx. . 250" of deflection. The I beams will be 60" long and the load will be a maximum of 250 tons. Thank You.

So what exactly is your question - required size of I Beams? You need to clarify a few things:

1. I don't understand the hole that's in the middle of the plate - does the hydraulic cylinder fit into this hole (that wouldn't make much sense)?

2. Clarify how the cylinder provides the load. Does it malke a point load to the plate? Where? Or is it a 4 foot-long cylinder laying on its side to span between the I beams, with 250 tons evenly distributed over the 4 feet?

3. Does the bracing between the I Beams carry any load of the plate, or are they there just to keep the I beams in place?

4. Is the 0,25" deflection to be measured at the center of the plate, or at the center of the I Beams?

The 2" plate nis part of a support base for a casing jack which is used to pull pipe out or the ground. The hole is where the pipe comes up through the base. The hydraulic cylinder that is used to pull the pipe is actualy ba hollow cylinder that sits over the hole with a set of slips that sit on top. The pipe comes up through the hole, up through the cylinder and is grabed with the slips and is pulled as the cylinder is extended. The load is applied to the center of the plate over the diameter of the cylinder which is 21.5", so its mainly ba single point load in the center of the plate. The I beams are to support the 2" plate so that it won't bend under this load anf the bracing between the I beams is to keep them from bending sideways and also to support the plate across the 4' width of the 2" plate. The deflection will be measured at the middle of the plate where the cylinder sits.

Thanks.

10" I Beam x 4Mtr Length span Height of lift 3Mtrs maximum load lifting capacity