Turn the jack stand upside down and cut off the “U” flange,
leaving approximately 1/8 inch of flange overhang when cutting
to keep the pipe from falling through the sleeve tube.
Determine the maximum available height between
the wing jack point and the floor. Set the leg length
to easily slide the stand under the wing and clear the
Building two jack stand frame extensions will require
six pieces of 1-inch by 1-inch by 1/8-inch steel angle iron
cut to approximately 18 inches in length. One end of each
piece will need to be bevel cut (both faces) at approximately
65 degrees (to the vertical) or 25 degrees (to the floor) sit
The tripod base is reinforced with three strips of 3/16-inch by
3/4-inch steel scrap.
Bill of Materials (for two low-wing jacks)
160 inches of 1-inch by 1-inch by 1/8-inch angle
84 inches of 3/4-inch by 3/16-inch flat steel strap
40 inches of 3/8-inch rod for truss straps
5 inches (length) of 2-inch diameter aluminum
2 each 6-inch stroke hydraulic bottle jacks
Chop saw, cutting torch, or plasma cutter
Lathe to machine end caps and jack point
flush on the floor. Clamp and tack weld one leg on to the
jack stand. Attach the other two legs with C-clamps and
adjust the leg lengths to make the axis of the jack stand
absolutely vertical before welding the other legs.
Bridge nominal 13 inches length with 45 degrees bevel
on one end. Mirror for opposite side. Legs are 18 inches
nominal length with approximately 25 degrees bevel on
one end for a flush mating surface to the floor.
Make good welds. The health of your aircraft will
depend on them.
Then weld each leg in four places. Two welds at the
top of each angle iron and 1-inch welds on the edges
of the jack stand frame near the bottom. Next, reinforce
the tripod base with three strips of 3/16-inch by 3/4-
inch steel strap. The height above the floor for these
reinforcing straps is a function of three variables:
• The length of the jack stand sliding tube. (This will
vary from 8 inches to 12 inches depending on product
• The additional height of the aluminum end cap and