Pretty basic in design, these cranes make up a large share of the number of total cranes manufactured. A single girder bridge is supported on each end by top running end trucks.

For crane spans under 60′, these bridge girders are fabricated from structural steel sections. For crane spans over 60′  (and some higher capacities) bridges are fabricated box girder sections. For Example, these can be 20 Ton capacity by 120 ft. spans.

Hoists for these cranes run on the lower flange of the bridge. Therefor, the hoist “C” dimension is below the girder.

Based on preference or capacity/spans, a double girder crane may be selected. Here, two bridge girders are supported by top running end trucks. For crane spans under 60′, these bridge girders are fabricated from structural steel sections. For spans over 60′ and higher capacities, bridges are fabricated box girder sections. These high capacity cranes can be 300 ton and span up to 160ft.

Hoists for these cranes run on top of the bridges. Depending on girder and hoist configurations, these provide a higher hook height vs. single girder cranes. A nice advantage of these is their inherit minimal maintenance requirements.

As the name implies, these crane end trucks run on the lower flange of the runway beams. Generally, these are single girder cranes but occasionally one will need a double girder under running crane. These bridges are usually structured steel sections but long spans can be fabricated box sections.

Hoists for these (single girder) cranes run on the lower flange of the bridge. Therefore the hoist “C” dimension is below the girder. Hoists on the double girder models may be located between (within) the bridges or even run along the top of the bridges.

Jib Cranes provide lifting capabilities where there may be no overhead crane or in conjunction with the overhead crane. Selecting the correct Jib requires an analysis of what needs to be lifted, how often, and how it will be supported.

Types of Jib Cranes:

• Wall/column mounted tie rod style
• Wall/column mounted cantilever style
• Mast
• Free standing pillar based mounted
• Free standing pillar sleeve mounted
• Wall traveler Jib Cranes
• Articulated boom Jibs
• Work station style

The How –  via electric chain hoist, pneumatic chain hoist, hand chain hoist, wire rope hoist, load balancer, or manipulator.

Jibs – manual rotation or powered rotation Jib capacity capabilities range from a few hundred pounds to a project completed with a pillar double girder 15 ton Jib.

These are “A” frame designs where portability is needed and runways are not feasible. Steel models up to 10 tons are available  and spans up to 40′. They can be fixed height or adjustable. For lighter weights, aluminum models up to 3 tons are available.  Travel motion may be push or powered. Guidance may be on tracks or “Steerable” poly wheels. Casters may be fixed position or swivel with or without locks.

A big step above are the gigantic gantries exceeding several hundred tons and spans on some capacities well over 100ft. They are big, strong, and productive.