cross shape and side tubes 52 and 54 each of the foregoing components of frame or base 10 can be welded or otherwise rigidly connected pieces 34 and 36 may or may not be tubular and are welded or otherwise attached into cut out recesses in the tops of tubes 30 and 32 similarly cross shaped tubes 48 and 50 can be welded into position in cut outs in corner tubes 40 42 44 and 46 and converge to a central area at their opposite ends vertical tubes 40 42 44 and 46 could be 6 u2033 by 6 u2033 steel tubing or 5 u2033 by 5 u2033 fig1 illustrates the four outriggers 16 each outrigger 16 comprises a telescoping arm here made up of first telescoping section 56 and a second telescoping section 58 each of which telescopes out of an open end at each corner tube 40 42 44 and 46 of one of tubes 48 or 50 a jack 60 at or near the distal end of section 58 of outriggers 16 includes a ground contacting foot 64 at the end of an extendible leg 62 foot 64 can be adjusted along the axis of leg 62 by a manually operated handle 66 the frame 10 therefore has outer dimensions that basically define a box it is primarily made of tubing and has substantial open space between top 14 and bottom.