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Power Wedge Mechanical Pre-Stressing

The Power Wedge Mechanical Pre-Stressing Device applies active roof loads from prop-type supports. Power Wedge converts torque into upward roof force generating pre-stressing loads up to 10 tons.
Hands installing a Power Wedge Mechanical Pre-Stressing Device
Yieldable Support

Operation of Power Wedge creates yieldability within the unit, making it useable with yielding or non-yielding props. The unit is designed for use with 8 1/2" (215 mm) and 10" (250 mm) diameter props. Power Wedge can also be used in place of temporary steel supports in headgates, beltways, tailgates and intersections.

Diagram of two Power Wedge Mechanical Pre-Stressing with Roof Supports
Power Wedge Mechanical Pre-Stressing with Roof Supports
Dependable Performance

The Power Wedge provides consistent, high-quality performance.

  • Converts torque into upward force on roof
  • Generates active loads of up to 10 tons (9 tonnes)
  • Force applied on roof is up to 250 times that of force on wrench
Illustration of a miner working on a Power Wedge Mechanical Pre-Stressing Installation
Power Wedge Mechanical Pre-Stressing Installation
APPLICATION

Torque is applied with a 1 1/8" (29 mm) socket via hand wrench, air or hydraulic tool. It provides pre-stressing without the need for water, grout or pumps.

power wedge pre-stressing for mine roof support