Ellis shore clamps shoring screw jacks Ellis concrete forming supportsShoring and Bracing Specialists Since 1951.
Ellis Manufacturing OverviewEllis Manufacturing HistoryGalleryVideosProductsContact Ellis ManufacturingEllisOK Online Store
Commercial Construction

Residential Construction

Search and Resue

Mining and Excavation

Item #

Item Name

Weight List Price

Add to Cart

TJ-4 Timber Jack (15,000 Lb. Capacity) 10 lbs. $40.00 ea.

TJ-6 Timber Jack (30,000 Lb. Capacity) 13 lbs. $45.00 ea.

Ellis Timber Jack TJ-4

Timber Jack 4x4 (TJ-4) pictured right
Load Capacity: 15,000 Lbs / 7.5 Tons
Overall Height: 9-1/8"
Base Plate 5"
Top Plate: 5-1/2"
Acme Screw Size: 1-1/4"
Range of Adustment: 5"
Lifting Capacity: 4000 Lbs. / 2 Tons

Load Capacity: 30,000 Lbs / 15 Tons
Overall Height: 10"
Base Plate 5"
Top Plate: 5-1/2"
Acme Screw Size: 1-1/2"
Range of Adustment: 5"
Lifting Capacity: 4000 Lbs. / 2 Tons


Eliminate the vertical shore member and attach the Timber Jack directly to the horizontal 4x4 or 4x6 (as pictured below).

To Assemble:

  • Drill 1-3/8" x  6" (for TJ-4) or 1-3/4" x 6"  (for TJ-6) hole using auger or self feed drill bit into center of lumber to accept 1-1/4" or 1-1/2" Acme threaded screw.
  • Position Timber Jack so the Acme screw will slide into the predrilled hole in lumber.
  • Adjust the top plate so all 4 mounting holes line up within the boundaries of the lumber.
  • Drill 4 - 5/32"x1" holes through the mounting holes in the top plate and into the lumber.
  • Insert 4 - 1/4"x1-1/2" lag screws through the mounting holes in the top plate into the predrilled holes in the lumber and tighten.
  • Attach Ellis Purlin Splicer to Beam or Joist where support is desired.
  • Slip 4x4 or 6x6 lumber attached to the Timber Jack into the square tubing of the purlin splicer and secure with nails through the holes provided.
  • Adjustment to Timber Jack can be made by turning "U" shaped handle at bottom of screw.  Acme threads are greased for easy adjustment.
  • Attach base plate to a solid foundation through the 4 holes provided.

Caution. The acme screw of the Timber Jack will completely separate from the acme nut if screwed out too far.  Do not extend the acme screw past the maximum adjustment of 5".  This will insure that the threads of the acme nut will be used to support a heavy load.

See other Ellis Screw Jacks                                                 

Ellis Bridge Jack 6x6 Screw Jack Galvanized Ellis Screw Jack 4x4 Painted Finish Mini Screw Jack
Bridge Jack 6x6 Screw Jack 4x4 Screw Jack Mini Jack Steel Shore

Ellis Hydraulic Jack               Need more LIFTING Power?

Ready to Checkout View Your Cart