Bridge Girder Launcher

● The tracing data of product is made up of contract, review file, drawing , calculation book of design, specification, installation project, raw material quality certificate, product quality inspection record, welding inspection report and purchased certificate.
● leaving factory data is made up specification, installation project, certificate and receiving report etc.

According to the weight of parts, choosing the lifting machine, and installing steps are following:
● the frame of legs are assembled on the ground.
● double main girders are assembled on the ground.
● the legs are lifted and installed.
● the first layer of main girder is lifted and installed.
● the second layer of main girder is lifted and installed.
● lifting trolley and frame are lifted and installed.
● pulley of trolley, winch and lifting tools are lifted and installed.
● front and rear guiding girder , front and rear auxiliary legs are lifted and installed.
● electrical system and hydraulic system are lifted and installed etc.
● other parts are installed.

After the assembly of components of bridge girder launcher is finished, the workers should do the following tests acceding to geometry size、verticality、horizontality and deflection etc.
● the span deviation of wheel : L＜5mm
● the camber of main girder: AF=（0.9/1000～1.4/1000）S
● diagonal deviation of main girder （D1-D2）≤5mm
● side curvature of main girder: AFP≤S/2000
● gauge deviation of trolley: end of span±2mm, middle of span K≤7mm;the deviation of rail joints of trolley shouldn’t exceed 1mm; the lateral dislocation shouldn’t exceed 1mm.
● the connection of high-strength bolt should base on the standards JGJ82-91---《The design and acceptance specification of high strength bolt connection of steel structures》