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6.3 Latticed Steel Gin Pole
6.3.1 The straightness for the centerline of latticed steel gin pole pair shall not be greater than 1/1000 of the length and 20mm.
6.3.2 The connecting bolts for latticed steel gin poles shall have their threads lubricated with grease during installation，and shall be fastened in turn in a symmetrical and diagonal manner.Bolts and nuts of unknown material shall not be used.
6.3.3 The following items of latticed steel gin pole shall be checked on a regular basis:
a）Main member；
b）Painting；
c）Welds；
d）Rotating part.