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 thegarden. Designed to set boulders in place, it could be used to moveother weighty loads with low centers of gravity, such as heavy sacks ofsoil amendment.

This device combines three fundamental machines–inclined plane,lever, and wheel–in the simplest form. It’s made of a10-foot-long 2-by-12 plank with a 2-by-4 cleat nailed on top. A 1-footcut-out in the plank provides a pair of handles. Two wheelbarrow wheelsmount to a steel axle that runs through 3/4-inch conduit attached to theplank with U-bolts.

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

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