Self-balancing Beam Launcher

  • Lifting Capacity:80-300T
  • Span:30-50m
  • Power Supply:3-Phase A.C.50Hz 380V / Diesel
  • Via method: walking self-balancing

Self-balancing beam launcher is a new product developed by our company based on walking beam launcher. Compared with the walking beam launcher which needs to balance the counterweight, the self-balancing beam launcher does not need the assistance of the beam transport vehicle to complete the hole passing independently. The beam launcher can directly return to the beam yard after the beam transport is completed, which greatly improves the overall erection efficiency.

Self-balancing beam launcher consisted of main beam, front middle and rear legs, the front auxiliary outriggers, the upper cross beam, the crane, the horizontal moving track, and the electrical system of the hydraulic machine. It can erect straight, curved, and longitudinally equal-span and variable-span double-line prestressed concrete whole-hole box girder. It has the characteristics of good beam hoisting stability, high work efficiency, safety and reliability, convenient variable span adjustment, and convenient operation.


  • Increase the self-balancing through hole of the front auxiliary outrigger, without the need of the beam carrier, which greatly improves the erection efficiency.
  • The main beam adopts a truss structure, which has the advantages of light weight, large load, and strong wind resistance.
  • Break every 12 meters with a pin shaft and bolt link, which is convenient for transfer and transportation.
  • Walking forward, the middle outrigger does not walk on the bridge deck, and there is no need to erect a longitudinal moving track.
  • The outrigger has an adjustable angle core plate, which can adapt to the inclined bridge at any angle below 45°
  • The standard electrical equipment of the whole vehicle is Siemens or Schneider.
    Optional: Frequency control
    Optional: Security Monitoring, PLC control
    Optional: Diesel generator sets

DaFang Standard protection measures of self-balancing beam launcher

  • Emergency stop
  • Overload protection
  • Stroke and lifting limit switch
  • Undervoltage and lack of phase and overcurrent protection
  • Audible alarm
  • The lifting mechanism and the motor are equipped with rain proof cover
  • Anemometer


Item JQJ 30-100 JQJ 30-120 JQJ 30-160 JQJ 30-200 JQJ 30-300
Capacity(T) 100 120 160 200 300
Span(M) 30 30 40 50 50
Lifting Speed((m/min)) 0.79 0.79 0.7 0.9 0.7
Transverse Moving(m/min) 1.5 1.5 2.25 1.5 1.5
Longitudinal Moving(m/min) 3 3 4.25 2 2
Trolley Transverse Moving(m/min) 1.5 1.5 2.25 1.5 1.5
Trolley Longitudinal Moving(m/min) 3 3 4.25 2 2
Adaptive Longitudinal Slope 0.05
Applied Angle 45°
Adaptive Cross Slope 0.025
Total Power(KW) 65 65 75 110 150
Tips: All parameters can be customized.

Why Dafang Crane?

  • 70000 sets cranes/year
  • Output value: 600million USD
  • 850,000m²Covers an Area
  • Export 100+ country


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