Trailer Safety Jack

Manufacturer: Copperloy

F.O.B. Midwest Warehouse

Only one Safety Jack is required to safely support your parked trailer and protect against landing gear failure. It's one-piece construction meets OSHA standards and is capable of lifting 25 tons and supporting 50 tons.

Trailer Safety Jacks are essential for safely loading parked trailers. Adjustable screw jack provides safe, secure support when placed under front of an uncoupled semi-trailer at the loading dock. A single jack under fifth wheel plate can prevent nose heavy trailers from tipping, protect against landing gear failure, and prevent dolly wheel from sinking so that the tractor can't engage the trailer. Under certain hazardous conditions, a jack at each front corner will prevent the trailer from upending during loading.

Seven and one half inch diameter top plate with a full swivel and 10° tilt maintains solid contact with fifth wheel plate, even on slopes.


  • 50,000 lbs. lifting capacity
  • 100,000 lbs. static capacity
  • Mechanical jack screw raising action with ratchet lever
  • Overall Height - 34-1/2" to 50" (other heights available)
  • Top Plate- 7-1/2" diameter, ball and socket mounted, 10° tilt
  • 20" triangular base
  • Acme jack screw thread, 2-1/2" diameter, 4-pitch
  • Fixed handle with rubber hand grip adds convenience to moving and positioning jack
  • 8" diameter phenolic wheels with delrin bearings
  • Weight - 115 lbs.

1 Model Available for
Trailer Safety Jack

*Prices subject to change without notice

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Model No. Description Height Range Price Ea. Qty
JAK-100RB with Ratchet Handle 34-1/2" to 50" $860.21

1 Option Available for
Trailer Safety Jack

Trailer Safety Jack Option Image

Option: Safety Sign

For display when jack is under fifth wheel plate.

Warns drivers and dock personnel to remove trailer jack before engaging tractor to trailer.

Clip attached to back of sign makes it easy to mount sign on air line hose.

Dimensions: 10"H x 14"W.
Model No. Dimensions Price Ea. Qty
014-031 10"H x 14"W $14.00