1. Application range of Double girder Overhead Crane

overhead crane not only can lifts parts of workshop or steels in factory, but also lifts bulk cargo with professional lifting tools, such as coal and ore etc.

2. Main features and advantages of Double girder Overhead Crane

The mostly factories adopt double girder overhead crane in China; it is suitable for lifting and transferring of goods which more than 20t.
● The main girder of overhead crane adopts double box beams; it can meet the requirements of strength, rigidity and stability of big tonnage crane.
● The traveling speed of crane is quick, and production efficiency is high.
● Different lifting tools can meet the lifting and installing requirements of different situation.

3. The design standard of Double girder Overhead Crane

The overhead crane is designed according to the newest rules and standards of crane and machinery in China.
● 《Crane Design Standard》（GB/T3811）
● 《General Bridge Crane》(GB/T14405)
● 《Code for Design of Steel Structures》（GB 50017）
● 《Code for Construction and Acceptance of Steel Structure》（GB 50205）
● 《The key Purpose of Steel Wire Rope》(GB 8918)
● 《The code of construction and acceptance for Electric equipment installation engineering》( GB50256)
● 《General Technical Conditions of Hydraulic System》 (GB 3766)
● 《Safety technical specification for construction of Railway Engineering》（TB10401.1）
● 《Mechanical Properties of Fasteners Bolts, Screws and Studs》（GB 3098.1）

4. Main technical parameters of Double girder Overhead Crane

Product Model QD16/3.2 QD20/5 QD32/5 QD50/10
main hook lifting capacity(t) 16 20 32 50
span (m) 10.5-31.5 10.5-31.5 10.5-31.5 10.5-31.5
main hook lifting height (m) 16 12 16 12
auxiliary hook lifting height (m) 18 11 18 16
main hook lifting speed(m/min) A5 7.9 7.2 7.8 5.9
main hook lifting speed (m/min) A6 13 9.7 9.5 7.8
trolley moving speed(m/min) 44.6 44.6 42.4 38.5
auxiliary hook lifting capacity(t) 3.2 5 5 10
auxiliary hook lifting speed (m/min) 14.5 12.7 19.5 13.2
crane moving speed (m/min)A5 84.7 84.7 87.6 74.6
crane moving speed (m/min)A6 12.5 112.5 101.4 86.6
power （Kw） 85 100 120 150