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Double Girder Bridge Cranes

A typical double girder crane has capacities greater than 15 tons with spans greater than 60 ft.; or when max hook height is required. ProservCrane Group has manufactured cranes up to 180 ft. long with capacities as high as 250 tons. Our double girder cranes can be built up to a Class “E” service factor.

For a detailed description on service factors click here.

Top Running Double Girder Dual Drive Bridge Crane Up to CMAA Class “F” Service

Girder

  • Structural shapes based on span and capacity

End Truck

  • Available in 4-wheel and 8-wheel bogie configurations depending on wheel load requirements
  • Rotating axles are standard
  • The end truck frame consists of tubular steel
  • Truck end plates serve as rail sweeps and shock absorbing bumpers
  • Double flanged wheels with hardened treads are mounted on rotating axles made of forged steel
  • Drive wheels have tapered treads
  • Ball or roller bearings are used based on wheel loading
  • Maximum rail size is dependent upon wheel diameter and capacity
  • A4 dual drives as a standard

Drives

  • Totally enclosed Non-Ventilated(TENV) AC 60 min. vector motor
  • Class H Insulation
  • Class “F” Thermostats (Klixon) in all three phases
  • Motors are equipped with thermal switches imbedded in motor windings
  • Double reduction helical reducers for quiet operation with adjustable torque magnetic disc brakes
  • Bridge travel speeds are standard at 120 FPM variable speed
  • Speeds available through optional pricing

Controls

  • Motor thermal overload protection - reduces possible motor damage
  • Quick stop - reduces possibility of crane collision
  • UL recognized electric thermal overload
  • Dynamic braking resistors
  • Clearly marked wires at both ends
  • Optional creep logic
  • NEMA 4/12 enclosure

Cross Conductors

  • Festoon cross conductors include C-track, cable carriers, and flat cable to supply power and controls to the hoist
  • Galvanized heavy duty track available upon request

Paint

  • A standard ProservCrane finish is a safety yellow industrial enamel
  • For information on custom paint specifications contact our sales department

Bridge

  • Standard structural shape or fabricated box
  • Polyurethane bumpers are standard

Options

  • Open or enclosed cab operation with optional AC and heater
  • Walkway for ease of maintenance
  • Radio control
  • Bridge alarm and rotating beacon
  • Other special features can be added to meet your application or individual requirements. Contact your Sales Representative for pricing information.
  • Line and load reactors

 

Contact ProservCrane Group today so we can help you design the best overhead crane for your business.


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