Plank-barrow for moving a heavy load Essay

If you can lift, pry, tilt, or roll a rock onto this super-barrow,
you can haul it with ease and unload it just about anywhere in the
garden. Designed to set boulders in place, it could be used to move
other weighty loads with low centers of gravity, such as heavy sacks of
soil amendment.



This device combines three fundamental machines–inclined plane,
lever, and wheel–in the simplest form. It’s made of a
10-foot-long 2-by-12 plank with a 2-by-4 cleat nailed on top. A 1-foot
cut-out in the plank provides a pair of handles. Two wheelbarrow wheels
mount to a steel axle that runs through 3/4-inch conduit attached to the
plank with U-bolts.



With the plank laid down, place the load on the low (handle) end
and slide it toward the wheels for maximum leverage. The cleat keeps
the load from sliding off, and a block under the wheels will keep them
from rolling during loading. If uneven terrain–steps or a dip–makes
it impossible to wheel right up to your target, simply lay the plank
down like a ramp and slide the load off the handle end.

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