7.5 Ton Free Standing Bridge Crane 2

[STR04]

All,

Can anyone tell me if and where you can purchase a 7.5T free standing bridge crane off the shelf?

TIA

 

[Lutfi]

what do you mean by free standing? Do you mean gantry?

Regards,
Lutfi

 

[STR04]

If that refers to unbraced columns, then yes. I wasn't aware of the termonology. Do you know of any mfgr's off top your head.

 

[JedClampett]

Mi Jack makes rubber tired gantry cranes. But the smallest one listed is 18 T.

http://www.mi-jack.com/travelift/traveliftrtg/traveliftrtg.html

 

[shepherd]

It sounds like you might mean a pedestal crane? If so, try the following:

http://www.patriotcrane.com/

 

[kenvlach]

A freestanding bridge crane is one that doesn't rely on building supports (except for floor/foundation). Columns and runways are stationary, and a traveling bridge provides motion in the longitudinal 'y' direction.
With a gantry crane, the entire crane rolls on wheels for 'y' motion.
For both, transverse 'x' motion is provided by trolley-mounted hoist(s) traveling along the bridge or gantry cross-members.

Freestanding bridge cranes are available 'off the shelf' up to 4000 pounds capacity. These can be anchored with drilled holes in a standard 6” reinforced concrete floor. Smaller ones are now sometimes called workstation cranes. Some manufacturer sites for details and terminology:

http://www.spanco.com/pages/wsstandalone.php

http://www.craneveyor.com/cranes/overhead/overhead.htm

http://www.ipandc.com/workstationcranes.html

For the heavier bridge cranes, the manufacturers sell kits & components w/o the structural steel (as well as full cranes disassembled for shipment). They will furnish structural plans. Perhaps the fastest way to go.
The toprunner style is relatively simple and generally provides the greatest lifting height if you have ceiling constraints. The traditional underslung style has transverse cap beams which give it a sturdy, boxlike structure, so doesn't need as many columns nor the column bracing of toprunners.

http://www.contrxcranes.com/

http://www.naicranes.com/cranes/components-kits.htm

Two basic methods of providing electric power to the bridge and hoist is an important parameter:
1) Festoon system, with slung insulated cable, best for outdoors and moist/corrosive/dirty environments, and
2) Sliding contact conductor, better for heavier cranes. The conductor rails are commonly enclosed in flexible plastic with a slit for the sliding contact shoe (copper/graphite). E.g., 'SAF-T-BAR:'

http://www.ipandc.com/festoon.html

http://keepitmoving.com/index.html