A plate compactor packs a granular base so the slab, patio or backfilled trench above it stops settling later. Counters keep three machines under that name: a forward plate for sand and gravel, a reversible plate for deeper lifts, and a rammer, the jumping jack, for cohesive soil in a narrow trench. Day rates run from about $55 to $180 across the three.
Forward, reversible or a rammer
A forward plate walks one way and is the light machine for paver bedding and thin gravel lifts. A reversible plate drives itself backwards, weighs a great deal more and reaches deeper. A rammer hammers a small foot into clay and silt, which a plate merely bridges over, and it is the only one that suits a trench.
Force rating and lift depth
Machines are quoted by centrifugal force, from roughly three thousand pounds on a light forward plate to twelve thousand and beyond on a reversible. Force buys depth, not speed. A light plate compacts a few inches of clean stone properly; asking it to do a foot of fill just polishes the surface of a loose layer.
A full day on the handles
These machines shake hard and run loud, and a day behind one is a real exposure to both vibration and noise. Hearing protection is the obvious part. The less obvious part is splitting the work between two people, because grip strength fades and a tired operator lets the plate wander off the line.
Loading one without hurting anybody
A forward plate is a two person lift and a reversible plate is not a lift at all; it wants ramps and a winch or the yard's trailer. Check the machine has its lifting handle or bail intact before you leave, and never take the tailgate route with the heavy models on your own.
Questions people ask about rent plate compactor
Which plate compactor do I need for pavers?
A light forward plate for bedding sand and for the final pass over the laid pavers, with a protective mat under it so the plate does not chip the surface. The base underneath wants something heavier, so many jobs hire a reversible for the base and a small plate for the finish.
Can a plate compactor compact clay?
Not well. Vibration works by shaking particles together, which is what granular material does and what cohesive soil does not. Clay and silt need the impact of a rammer, or a padfoot roller on a larger job. On mixed backfill, a rammer is the safer hire.
How many passes does a lift need?
Usually three to five overlapping passes on a lift the machine can actually reach, with the pattern turned ninety degrees between passes. If the surface stops changing under the plate and the machine starts riding on top, the layer is as compact as that machine will make it.