5.4　Installation of Cable Drum

5.4.1　The installation of cable drum shall be in compliance with the following requirements（Figure 5.4.1）:

1　The levelness of the drum is adjusted，and allowable deviation shall be 1/1000 of the length of drum；

2　The lateral deviation of the drum on the datum line of the rail is adjusted and is detected at W1 and W2，and allowable deviation shall be 1.0mm.

Figure 5.4.1　Detection figure of cable drum

1-Level gauge；2-Drum；3-Traveling rail；4-Plumb bob

5.4.2　The installation of reel shall be in compliance with the following requirements:

1　The lateral deviation of the reel and the longitudinal datum line of drum is adjusted，and allowable deviation shall be 5.0mm.

2　The perpendicularity of the reel is adjusted，and allowable deviation shall be 2.0mm.