Model S6T12-S10AC
Tri-Adjustable Steel 3-Ton Gantry Crane
10′ Span, 8′ 2″ – 12′ 8″ Height
✓ Steel Construction
✓ Adjustable Height (C), Span(B), and Caster Frame Spread (E)
✓ 3 Ton (6,000 pound) capacity (A)
✓ 4′ 11″ Clear Span (D)
✓ 6′ 0″ – 10′ 0″ Caster Frame Spread (E)
✓ 13″ Leg Clearance (F)
✓ 8″ Caster Diameter (G)
✓ 8″ I-Beam Depth (H)
✓ 815 Pounds Net Weight
Designed and manufactured in the United States.
Completely portable.
Easy to assemble, disassemble, transport, and store.
Durable and strong.
Designed to roll under load.
Most orders ship in 3 to 5 days.
Product Details
Model S6T12-S10AC
Key Features
Durable, Stable, Adjustable, and Portable
One of our most popular product lines is the steel tri-adjustable 3 and 5-ton gantry crane. The steel design makes these cranes incredibly strong and durable. Made with high-quality heavy-gauge steel tubing, our 3 and 5-ton Tri-Adjustable gantry cranes are designed to roll under load. They have an adjustable height (C), span (B), and caster frame spread (E).
- The Tri-Adjustable is built using our patented pinned-joint design resulting in a longer-lasting, better-fitting, more flexible crane that is quick and easy to assemble and disassemble.
- Exclusive Wallace I-beam support system aligns off-center loads to avoid crane and trolley distortion. Support system slides along the I-beam enabling leg spacing adjustments and cantilever configurations.
- Casters are equipped with a 4-position swivel lock. When locked 90 degrees with each other, they position the crane more firmly than a brake.
- Adjustable legs permit crane height adjustments in 6″ increments using spring-loaded bolts. You can raise the height of your crane so it goes over materials and equipment, lower it under low ceilings and doorways, or set legs at different heights when floors or terrains are uneven. It’s ideal for truck loading or from a dock to a floor or ground level to a mezzanine.
- Adjustable span allows for inboard or outboard bracing and a cantilever configuration overhang of up to 25% of the I-beam length.
- Adjustable caster frame spread (E) enables rolling through narrow aisles or doorways and prevents having to disassemble and reassemble your crane. Safety cables inside the caster frame tubes prevent overspreading while adjustments are underway. Casters are equipped with 4-position swivel locks to position the crane more firmly than a brake.
- Tri-Adjustables can be wheeled around to serve more than one workstation or workplace. Lock “lead” casters and unlock trailing casters to easily move and steer crane. An optional Kart Kit transforms your disassembled gantry crane into a cart, allowing easy transportation and storage.
Model S6T12-S10AC
Dimensional Drawing
Print / download S6T12-S10AC dimensional drawing (PDF).
View I-Beam Flange Width Chart for Wallace Gantries.
Model S6T12-S10AC
Parts List
ITEM NO. | PART DESCRIPTION | PART NUMBER | QUAN. |
---|---|---|---|
1 | MAIN LEG BRACKET | 1553-0000 | 4 |
2 | SUPPORT PIN 11/16 DIA. X 4 9/16 LG. | 5017-0004 | 4 |
3 | SPACER BAR 26 3/8 LG. | 1744-0005 | 2 |
4 | COTTER PIN 1/4 X 1 1/4 LG. | 60-0070 | 8 |
5 | NEX. NUT 3/8-24NC | 54-0100 | 4 |
6 | SOC. SET SCREW 3/8-24NF X 1 3/4 LG. | 63-0110 | 4 |
7 | SOC. SET SCREW 3/8-24NF X 1 LG. | 63-0100 | 4 |
8 | LEG BRACE BRACKET | 1761-0000 | 4 |
9 | SUPPORT PIN 11/16 DIA. X 4 1/8 LG. | 2853-0000 | 4 |
10 | MAIN LEG SWIVEL PIN | 1559-0000 | 4 |
11 | LEG BRACE SWIVEL PIN | 1563-0000 | 4 |
12 | HEX. HD. BOLT 3/4-10NC X 2 1/2 LG. | 51-0480 | 4 |
13 | TROLLEY STOP ANGLE | 3464-0000 | 4 |
14 | KEY RING 2 1/4 OD. | 82-0030 | 10 |
15 | CAUTION TAG No. 399 | 1969-RING | 12 |
16 | LOCK WASHER INT. TOOTH 3/4 | 58-0040 | 4 |
17 | HEX. NUT 3/4-10NC | 54-0040 | 4 |
18 | I BEAM STL. 8″ X 10′ LG. | 761-0100 | 1 |
19 | LEG BRACE ASSEMBLY | 1543-0080 | 4 |
20 | MAIN LEG ASSEMBLY | 1665-0081 | 4 |
21 | UPPER MAIN LEG | 1666-0080 | 4 |
22 | ROLL PIN 5/32 X 3/4 LG. | 61-0300 | 4 |
23 | LOAD PIN | 3016-0000 | 4 |
24 | EXTENSION SPRING | 1017-0000 | 8 |
25 | LOWER MAIN LEG | 1662-0080 | 4 |
26 | CASTER FRAME ASSEMBLY | 699-0030 | 2 |
27 | LOWER MAIN LEG PIN ASSEMBLY | 1999-0000 | 4 |
28 | HEX. HD. BOLT 1/2-13NC X 5 1/2 LG. | 51-0470 | 4 |
29 | SAFETY CABLE ASS’Y 121″ LG. | 1967-0020 | 2 |
30 | OUTER CASTER FRAME TUBE | 700-0030 | 2 |
31 | CASTER FRAME ADJUSTMENT PIN | 1392-0000 | 2 |
32 | INNER CASTER FRAME TUBE | 701-0030 | 2 |
33 | CASTER CASTING FOR INNER TUBE | 2630-0000 | 2 |
34 | CASTER CASTING FOR OUTER TUBE | 2629-0000 | 2 |
35 | LOCK WASHER INT. TOOTH 1/2 | 58-0020 | 4 |
36 | HEX. NUT 1/2-13NC | 54-0050 | 4 |
37 | HEX. HD. BOLT 1/2-13NC X 1-1/2″ LG. | 51-0290 | 16 |
38 | LOCK WASHER INT. TOOTH 1/2 | 58-0020 | 16 |
39 | HEX. NUT 1/2-13NC | 54-0050 | 16 |
40 | CASTER WHEEL 8″ DIA. | 47-81NB | 4 |
41 | SAFETY STOP ASSEMBLY | 3112-0001 | 4 |
Note: There are alternate v-groove casters available for this crane.
Print / download a copy of the S6T12-S10AC parts list (PDF). The file also contains a copy of the Parts Location diagrams for this model.
Model S6T12-S10AC
Parts Location Diagrams
Round-Tube Tri-Adjustable I-Beam Assembly Parts Location Diagram
Round-Tube Tri-Adjustable Caster Frame Assembly Parts Location
Print / download a copy of both parts location diagrams (PDF).
Model S6T12-S10AC
Optional Accessories
Available accessories include manual and electric trolleys and hoists, jack kits for frequent crane height adjustments, kart kits for transforming your disassembled crane into a cart which allows for easy transport and storage, and festooning kits to keep hoist, trolley, and power drive system cords up and out of the way.
Options for track mounting with V-groove casters and motorizing cranes are also available.
Model S6T12-S10AC
Assembly and Disassembly Instructions
Cautions
- Read and understand instructions before using this gantry.
- Inspect gantry thoroughly before using. See the Tri-Adjustable Operating, Adjustment, and Inspection Instructions (Form 379) for damaged or missing parts.
- Do not lift more than rated capacity.
- Center hoist over the load.
- Do not allow the load to swing or roll against any supporting members.
- When moving the gantry under load, push on the gantry, not the load. Be certain that the rolling surface is hard, level, clean, and smooth.
- Do not move the gantry over 50 feet per minute (1/2 m.p.h.).
- Not to be used for lifting or supporting humans.
Before You Begin
- Place parts on a flat surface, preferably on cardboard to keep small parts clean and organized.
- Select a clear area to assemble the crane. The work envelope should extend five feet beyond twice the leg length (when flat) and the length of the I-beam.
- This clear area should be serviced by two overhead hoists or an alternate as shown below as well as in Form 379. This will allow you to raise the I-beam and leg assemblies when required.
- Select tools for fastening the nuts and bolts.
- You will also need C-clamps to hold the trolley in place while the crane is assembled.
Print / download a PDF of detailed, step-by-step Tri-Adjustable Gantry Crane Round-Tube Assembly Instructions (Form 429).
Model S6T12-S10AC
Safety Tag and Label Locations
Safety Tag Location
The following sketch shows the location of required safety tags on Wallace Tri-Adjustable Gantry Cranes. All locking pins or pins with a quick release must have a corresponding Tag 1969. Following the schematic below is a complete listing of all text found on all Labels and Tags on the Crane.
Print / download a PDF of the Tri-Adjustable Round-Tube Safety Tag and Label Locations Diagram.
Model S6T12-S10AC
Inspection Checklist (Form 504)
Instructions include:
- What to check for.
- How often to check.
- Frequent Inspection Checklist.
- Periodic Inspection Checklist.
View detailed Gantry Crane Inspection Checklist (Form 504).
Print / download a PDF copy of the checklist.
If you have questions or need assistance, please contact us.
Disclaimer
Please note this checklist was derived from company proprietary materials and (3) source documents including ANSI B30.17, CMAA Specification #74 Revised 1987, and OSHA 1910.179. As excerpts, the short form Wallace documents are intended to serve as general guidelines and are not to be considered the sole source when performing routine maintenance and inspection tasks.
Model S6T12-S10AC
Operating, Adjustment, and Inspection Instructions (Form 379)
Instructions include:
- Assembly and Safety Instructions
- Daily inspection
- Positioning of Crane to Handle Loads
- Positioning of Casters
- Adjustment Instructions
- Height Adjustment Procedure
- Caster Frame Adjustment Procedure
- Cantilever Configuration / Adjustment
- Wallace Built-In Safety Features
- Caution Areas
- Tri-Adjustable Visual Checkpoints
- General Safety Instructions for Crane Adjustments
- Methods of Supporting the Crane for Assembly
View detailed Tri-Adjustable Operating, Adjustment, and Inspection Instructions (Form 379).
Print / download a PDF copy of the instructions.
Model S6T12-S10AC
Cantilever Instructions
Cantilever Chart
Gantry Model Number: | S6T12-S10AC |
I-Beam: | S8″ x 18.4#/’ x 10′ |
I-Beam Length (Overall Span): | 120 Inches |
Maximum Cantilever Distance (A): | 30 Inches |
Gantry Rated Capacity: | 6000 lbs. |
Maximum Cantilevered Load (B): | 3600 lbs. |
Gantry Weight: | 825.5 lbs. |
I-Beam Weight: | 184 lbs. |
Proper Cantilever Procedures
Required counterweight should not be supported by gantry caster frame.
Load and trolley should be able to freely traverse the I-beam through the main legs and brace legs of the gantry.
Required Counterweight at (C) | |||||||||
A | B | B | B | B | B | B | B | B | B |
---|---|---|---|---|---|---|---|---|---|
IN FEET |
400 lbs. |
800 lbs. |
1200 lbs. |
1600 lbs. |
2000 lbs. |
2400 lbs. |
2800 lbs. |
3200 lbs. |
3600 lbs. |
1 | 0 | 0 | 0 | 0 | 41 | 130 | 219 | 308 | 397 |
2 | 0 | 10 | 210 | 410 | 610 | 810 | 1010 | 1210 | 1410 |
2.5 | 0 | 151 | 417 | 684 | 951 | 1217 | 1484 | 1751 | 2017 |
Print / download a PDF copy of these S6T12-S10AC cantilever instructions.
Model S6T12-S10AC
Warranty and Disclaimer
Wallace product warranty and errors and omissions disclaimers can be found below.
They are also in the About section of this website.
Model S6T12-S10AC
Engineering Specification
Gantry end frames shall be of steel round tube construction manufactured to Wallace Cranes standards, including, but not limited to the following:
- Gantry shall be adjustable in height and have main leg malleable iron center castings for brace leg attachment to main support legs.
- Gantry shall be adjustable in span so that operators may adjust the crane to an inboard braced, outboard braced, or a combination of the two or approved cantilevered configuration.
- Gantry shall be adjustable in caster frame spread and have aluminum castings for attachment of casters.
- The steel I-beam shall be American Standard and have a design deflection of no greater than l/800th of the span. The I-beam shall also be free swinging and self-aligning to lift off-center loads as approved.
- The telescoping legs shall be adjustable in 6” increments and also be equipped with malleable iron safety stops for everyday use as well as when adjusting height.
- Spread adjustment on the caster frame shall be in 6” increments. Over-spreading of the caster frame adjustment shall be prevented by means of an internal steel safety cable.
- The main leg malleable iron center castings shall have spring-loaded pearlitic grade load-adjusting pins for adjusting/maintaining height adjustment of crane as well as attachment of brace legs.
- Gantry shall be equipped with four, 360 degree rotating, non-marking phenolic resin casters with 4-position swivel locks, at 90 degrees, to provide easy steering of crane by locking “lead” casters only, or to allow positioning of crane more firmly than a brake by locking all four casters 90 degrees to each other. Casters shall be 6” or 8” diameter as determined by capacity, height and span of crane.
- The I-beam and I-beam brackets shall be painted with red gloss industrial-quality paint.
- The frames, including brace legs, caster frames, and main legs shall be dip painted with red gloss industrial quality paint for protection of both inner and outer tubing walls.
- The model number to be provided shall be tested in accordance with Wallace specifications (A specific unit shipped is not tested; unless a Certificate of Test is ordered [additional charge applies]).
- Gantry is manufactured in accordance with our interpretation of ANSI B30.17 and U.S. OSHA, (Section 1910.179, revised January 1976), regulations at the time of manufacture.
Print / download a PDF version of the specification.
Model S6T12-S10AC
Photo Gallery
Wallace Tri-Adjustable gantry cranes have a wide variety of commercial and industrial applications, both indoors and out. Images (below) provide a sampling of different applications of our steel (red) and aluminum (silver) Tri-Adjustable gantry cranes.
Related Products
Wallace also offers steel frame, aluminum I-beam (Hybrid) 3 & 5-ton portable gantry cranes. Hybrid cranes provide the same lifting capacity as our all-steel models, but at a reduced gantry weight. They have adjustable heights, spans, and caster frame spreads.