15 / 15
Tests Passed
9,600 lb
Max Test Load
15°
Max Pull Angle
16 in
Max CG Offset
2
Devices Tested
0
Slip-outs / Failures
Report Summary
Condensed summary of the field validation test campaign. Refer to the formal report (MF-FV-2026-001) for the complete record.
Executive Summary
Fifteen field-validation lift tests were performed on the OMNI Monkey Fist concrete lifting device at Post Falls, ID on May 13, 2026. The campaign swept embedment depth, in-plane pull angle (±X), lateral pull angle (±Z), CG offset, overload mass, and multi-device rigging. All 15 tests passed. The device never slipped out, all lifts were controlled, no structural damage was observed on either device, and no stop criteria were triggered.
Key finding on embedment interpretation: The 2 in device in a 2 in cored hole produced an interference fit and required mallet-driven insertion. The primary test condition is therefore maximum practical embedment, not freely bottomed 5.5 in embedment. This is likely more representative of real field use.
Envelope Tested
- Pull angles up to 15° in +X, -X, +Z, and -Z directions
- CG offset 16 in, combined with off-axis loading
- Combined +X / +Z 10° with 16 in CG offset
- Nominal/heavy two-block condition at 6,324 lb (above the 5,500 lb stated rating)
- Overload at 9,600 lb (three blocks, single device)
- Dual-device single-point rigging at 9,600 lb
- Shallow embedment misuse-style case
Key Field Observations
- Engagement teeth left clear witness marks inside the holes, indicating positive grip rather than slide-through
- Test 15 is the clearest footage of the engagement lugs shifting into the bite, easiest visual of how the device locks in
- Test 1 showed approximately 0.2 in of expected movement as the lever engaged
- Test 12 (CG offset + combined angle) showed approximately 1° rotational slip, the most dynamic case before overload
- Shallow embedment case showed slight initial skip before catching, then stable
- Installation required mallet-driven seating; hand pressure alone was not sufficient
- Initial non-perpendicularity of 0.5-1° at install, within normal field setup tolerance
- Removal required significant banging and wiggling; release mechanism alone is not enough
- No visible deformation of lever, bolt, or major components on either device after testing
- Minor cracking observed at the top edge of the offset hole after the most severe moment cases
Test Specimens
- Pipeline set-on (saddle) weights, est. 4,000 PSI concrete
- Block: ~24 × 72 × 24 in, 3,140 lb each
- Stacked 2-block: 6,324 lb
- Stacked 3-block: 9,600 lb
- Holes: 2 in (51 mm) dia, 5.5 in (140 mm) deep, core drilled
Equipment
- Gehl DL12-55 telehandler (12,000 lb)
- Iron Attach IA-JB-60T jib boom
- ~5 ft steel chain rigging
- Crane scale (post-lift settled reading)
- iPhone inclinometer for angle
- 240 fps close camera ~9.5 in from device, plus overall and wide-side coverage
Conditions
- 61°F, cloudy, light rain, 15-20 mph wind
- Device #1, Yellow (newer, S/N tagged)
- Device #2, Red (older configuration)
- Test Engineer: Darren Simoni
- Operator: Luke Greensides
Test Setup Photos
Reference photos of the test articles, equipment, instrumentation, and post-test inspection. Click any image to enlarge.
All still images captured during the field test are included in the
Photos folder. Browse full album
Test Matrix & Video Coverage
Click any thumbnail button to play the video. Slow-motion clips are 240 fps captured at the engagement zone and replayed at 8× slow.
Installation, Removal & Inspection
Supporting coverage of hole preparation, mallet-driven insertion, post-test removal, and device inspection.
Coordinate System & Pull Angle Convention
All ±X and ±Z angles in the test matrix are measured between the rigging chain and the vertical (+Y) device/hole axis. +X is defined toward the EYE side of the device (operator right); -Z is the telehandler side.
