Trial lifting and maintenance on HZQ highway launching girder

How about trial lifting and maintenance on HZQ highway launching girder?

FAQ May 04, 2013 Comments Off on How about trial lifting and maintenance on HZQ highway launching girder?

Before HZQ highway launching girder lifts precast girder formally, trail lifting and maintenance have to be done. Indexes for trail lifting shall be clear, such as deflection, skewing, centre line and others; meanwhile results for trail lifting must be explicit (whether it meets the demands of design).

main girder of launching girder

main girder of launching girder

After the launching girder is installed according to the drawing, firstly the manufacturing department will make a comprehensive check on the complete machine; then quality inspection department check and accept it, unless it is qualified, trial lifting and hoisting objects for launching girder can be allowed, and fill equipment acceptance form as basic material.

Main girder is main load-bearing metal structure of launching girder, correct maintenance has a direct bearing on performance, safety and service life of launching girder, maintenance parts are as below:

1. Check attachment welds between girders of launching girder, stop using the machine if there is a flaw and re-weld it;

2. As residual deformation or instability on main girder occurs, stop using the machine and handle it immediately;

3. Make maintenance on coating at fixed period to avoid corrosion of metal structure;

4. Serious starting, braking and reverse moving must be avoided.

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