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Erector ITM Monorail Systems

2 Ton Capacity Systems
United States Monorail overhead handling systems can be differentiated into a number of parts, each having an individual role. A large system may have a dozen interlocking bridge cranes, two jib cranes, fifty trolleys and hoists, two dip sections, monotractors (power driven trolleys), and a few thousand feet of track. This system could well have grown over a number of years - every year extending to a different department.

Standard Track (left) Specially rolled twin sections bolted back-to-back to form an inverted 'T' section. This arrangement provides a light running track of exceptional strength with resistance to wear and peining down under applied loads.

Girder Rail Track (right) Fabricated section consisting primarily of monorail track with added support from mild steel web plate and top flanges of structural steel angles. Used where long unsupported spans in overhead trackage are required.

Electrification Anti-shock shielded conductor bars are generally supplied for most applications.

US-401 Load Chart

Girder Rail Load Chart

For Ordering Track

Order Track .pdf


Splicing Method

No Joint Clamps ensure smooth trolley travel. An overlapping splice is staggered to form a continuous track over which trolley wheels travel easily.

For Added Strength the top flanges and rail sections of the Girder Rail track are also lap spliced. Forged steel hanger brackets slot into the specially formed head of the rail. The inside overhang of the track head rests on the square projecting shoulder of the hanger. Carrying capacity of the bolted assembly is far in excess of its rating.

Monorail Trolleys from very light two-wheeled swivel trolleys to fully articulating multi-wheel units with capacities of up to 4000lbs (1800kgs). Designed especially for use on 2" track, they provide the following benefits:

  • Perfect Track Alignment

  • Trouble-Free Service

  • Effortless Rolling

  • Smoother Travel

Monorail Switches and Turntables

Complete Range of Switches for omni-directional movement. Compact design allows closest spacing possible of branch tracks with maximum overhead space. Glide type switches provide positive alignment for load transfer over straight or curved tracks. Manual switches operate from pendant cord controls with pneumatic or electric remote control available.



Monorail Crane and Interlock System

The crane system incorporates similar articulating trolleys for the crane end trucks and hoist trolleys as used on the Monorail system. The fabricated Girder Rail section is included for the crane bridge and the cranes operate on either basic Monorail or the Girder runways. The maximum crane span when operating on two tracks is 30 ft. (9 meters) and the crane range is up to 4000 lbs. (1800 kgs.). The cranes can be of the push-pull type or alternatively power operated.

U.S. Monorail Crane Interlocks operate with extreme ease and safety. The latch bolt in the crane interlock, when set for operation by rope pull, is held in place by a keeper gate. This gate, upon reaching the con11t::LA111Y interlock is raised by a cam on the connecting interlock, releasing the bolt into the connecting interlock. By means of a rotating head in the connecting interlock, this latch bolt motion projects a second latch bolt from the connecting interlock into the crane interlock, thereby opening the safety stops for passage of trolley wheels across the connection.

From this it can be seen that it is impossible to release the safety stops unless the crane is locked in alignment with the connecting interlock.

A crane is unlatched by a pull on the opposite rope which returns the latch bolts and the safety stops to their original positions. Cranes cannot be unlatched if a trolley wheel obstructs action of the safety stops which protect open track ends.

  1. Interlock Support Bracket

  2. Interlock Oper. Mechanism

  3. Crane Interlock

  4. Connecting Interlock

System Integration

Eliminate Double Handling - With standard components systems are integrated with ease. This is achieved by an interlocking or latching system which enables loads to be transferred between bridges and spur tracks.

Minimum Maintenance - experience has shown that even under the most arduous conditions U.S. Monorail switches and turntables have required practically no maintenance at all. This is because there are very few wearing parts, and the few that there are can be replaced quickly and inexpensively.

Safety Guards - are provided to prevent trolleys from running off the open ends of the tracks.

Power Feed - monorail switches are designed to accommodate the Anti Shock insulated conductor bar system and provide a compact assembly of 4 bars on each track within the framework of the switch. If necessary additional bars can be accommodated by increasing the depth of the switch.
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