HZQ50-150 Highway bridge girder launching gantry

Launching gantry: 1. Quite reliable to install girders 2. Honeycomb girder 3. High safety 4. Outstanding quality

1. Main technical parameters of bridge girder launcher

item	specification
Span(m)	50
Rated lifting capacity(t)	150
total weight of launching gantry(t)	About 190
Structure	Honeycomb girder
Out dimension(m)	About 85.7×11×13
Minimum curve radius(m)	≥ 350
Maximum allowable gradient(%)	Longitudinal gradient ≤±3% Transverse gradient ≤±4%
Lifting speed(m/min)	0.8
Launcher longitudinal moving speed(m/min)	4.0
Launcher transverse moving speed(m/min)	2.87
Trolley longitudinal moving speed(m/min)	4.0
Trolley transverse moving speed(m/min)	1.8
Power(kw)	About 100
Comprehensive working speed	2 span in 3 days
Allowable wind speed in working condition(grade)	≤6

2. assembly order

assembly order: measure and position—lay rail track—install two main girders in a balanced and symmetrical position—assemble front connection frame and rear connection frame—install middle support—install front support, rear bracket and rear support—lift and install trolley—hydraulic and electrical system—plug in

3. Design basis

1) road bridge reinforced concrete and prestressed concrete structure design codes     TB1002.3-98

2) crane design standard        GB3811-2008

3) crane test standards and procedures   GB5905-86

4) hoisting machinery safety codes      GB6067-85

5)design code for steel structure                 GBJ50017-2003

6) general assembly technology requirements       JB/ZQ400.9-86

7) general technology requirements on weld assembly  JB/ZQ400.3-86

8) fasteners mechanical properties                GB3098-82

9)low-voltage apparatus basic standard              GB1497-85

10)general technical specification for hydraulic system GB/T3766-2001

HZQ50-150 Highway bridge girder launching gantry