L-type gantry crane rail installation steps
1 by drawing the design position, altitude mounting rail, rail before laying respond rail end, straightness and twist checks after passing laying. Install the mounting rails should be determined before baseline, the baseline should rail mounting location for the
steel crane beam axis.
2 steel beam laying on the track structure, track centerline on the actual beam actual centerline deviation should not exceed 10mm, and not more than half the thickness of steel girder webs.
3 - Track laying the steel beam, girder rail top surface of the bottom should be snapping. When there is a gap, and the length of more than 200mm, the pad should be added to the real plate, plate length of not less than 100 mm, the width should be greater than the bottom rail 10 - 20 mm, each plate should not exceed 3 layers, after a good pad with steel beams welded.
4 the center line of the track of the actual horizontal reference line on the installation position deviation
overhead gantry crane for general not be more than 5 mm
5 gantry crane rail span is less than or equal to 10m, the track span tolerance of ± 3.0 mm.
6 When the crane span greater than 10m, the deviation is calculated as follows, but the maximum should not exceed ± 15 mm.
△ S = ± [3 0.25 (S-10)] where: △ S-crane spans the allowable deviation (mm) S-crane rail span (m)
7 tracks the location of the top face of the longitudinal inclination of its design, common gantry crane should not exceed 3/1000, each 2m measuring point, the whole itinerary height difference should not be greater than 10 mm.
8 top surface of the track elevation relative to the reference point design elevation of tolerance, respect universal
hoist gantry crane was ± 10 mm. Same section of two parallel tracks elevation relative difference, for general gantry crane is ± 10 mm.
9 two parallel tracks joints should be staggered position, the distance should be equal to stagger gantry crane at the front and rear of the base.
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