Tri-Adjustable Steel 3 and 5 Ton Gantry Cranes

Tri-Adjustable Portable Steel 3 and 5 Ton Gantry Cranes | Wallace Cranes

Wallace tri-adjustable portable steel 3 and 5 ton gantry cranes are ideal for maintenance, manufacturing, repairs, and other material handling tasks. They are made in the USA using US-sourced steel.

Many customers use our cranes for HVAC, assembly, and repairs of physical equipment. With adjustable height, span and tread, our all-steel Wallace Tri-Adjustable Gantry Cranes provide flexible lifting solutions.

Available accessories include manual or powered trolleys and hoists, jack kits for frequent crane height adjustments, and kart kits for transporting and/or storing crane. Options for track mounting with V-groove casters and motorizing cranes are also available.

Download a printable (PDF) version of our Tri-Adjustable Square Tube Assembly and Inspection Instructions.

NOTE: We also offer a hybrid (steel frame, aluminum i-beam) 3 and 5 ton gantry crane. These are ideal if you want the high (3-5 ton) lifting capacity and a reduced weight crane.

Crane Product Features

Tri-Adjustable Square Tube Dimensional Sketch

Tri-Adjustable Square Tube Dimensional Sketch – Click to enlarge

  • I-beam spans from 10′ – 35′
  • Adjustable span allows inboard or outboard bracing
  • Adjustable span allows cantilever configuration overhang limited to 25% of the I-beam length
  • Adjustable legs permit crane height adjustment at 6″ increments
    • Raise height to go over equipment, material, etc…
    • Lower height to go under low ceilings, doorways, etc…
    • Legs can be set at different heights where floor or terrain is uneven-ideal for loading from truck dock to floor or from ground level to mezzanine
  • Adjustable caster tread to roll thru narrow aisles or doorways which prevents costly disassembly
    • Safety cable attached inside caster frame tubes prevents overspreading when adjusting
  • Durable construction-high quality heavy gauge steel tubing is used
  • Self-Aligning I beam – Exclusive Wallace I-beam support system aligns off-center loads to avoid crane and trolley distortion
    • I-beam support system slides along the I-beam enabling leg spacing adjustments and cantilever configurations
  • Height Adjusting Bolts – Main legs are equipped with spring-loaded bolts permitting crane height adjustment – they can be locked out until the desired height is reached, then unlocked to engage automatically
  • Casters equipped with 4 position swivel lock – when locked 90 degrees with each other, they position crane more firmly than a brake
    • Lock “lead” casters and unlock trailing casters to easily move and steer crane
    • Alternate steel V-grooved casters are available for us on angle iron track
  • Completely portable – Stress-proof steel pins with locking rings provide quick assembly and disassembly
    • The optional “Kart Kit” is available and transforms your disassembled crane to a cart which allows easy transportation and storage
  • Designed to roll under load

Tri-Adjustable Portable Steel 3 and 5 Ton Gantry Crane Sizes and Model Numbers

Click on model numbers to view detailed parts lists / part location drawings, crane inspection, safety, and assembly instructions, and cantilever charts

A B C D E F G H
Capacity Span Model Number Overall Height Clear Span Caster Frame Spread Leg Clear. Caster Dia. I-Beam Depth Ship Wt.
max min max min
 3 Ton 10′ S6T10-S10AC 10′ 1″ 6′ 11″ 5′ 11″ 6′ 6″ 4′ 0″ 11″ 8″ 8″ 695
S6T12-S10AC 12′ 8″ 8′ 2″ 4′ 11″ 10′ 0″ 6′ 0″ 13″ 8″ 8″ 815
S6T15-S10AC 15′ 10″ 10′ 7″ 4′ 9″ 10 ‘0″ 6′ 0″ 11″ 8″ 8″ 998
S6T18-S10AC 18′ 6″ 12′ 0″ 3′ 10″ 12′ 11″ 7′ 5″ 12″ 8″ 8″ 1135
3T24-S10AC 23′ 7″ 15′ 1″ 2′ 9″ 13′ 11″ 9′ 5″ 10″ 8″ 8″ 1989
15′ S6T10-15SAC 10′ 1″ 6′ 11″ 11′ 1″ 6′ 6″ 4′ 0″ 13″ 8″ 10″ 898
S6T12-15SAC 12′ 8″ 8′ 2″ 10′ 0″ 10′ 0″ 6′ 0″ 16″ 8″ 10″ 1019
S6T15-15SAC 15′ 10″ 10′ 6″ 9′ 9″ 10′ 0″ 6′ 0″ 14″ 8″ 10″ 1202
s6t18-15sac 18′ 11″ 12′ 0″ 8′ 10″ 12′ 11″ 7′ 5″ 15″ 8″ 10″ 1339
3T24-S15AC 23′ 7″ 15′ 2″ 7′ 8″ 13′ 11″ 9′ 5″ 12″ 8″ 10″ 2195
20′ <