Several attaching points are usually provided on the column of self-elevating tower crane in connection with the building under construction.
自升塔式起重机的塔身通常具有若干附着点与施工中的建筑物相连接。
2
The fatigue of steel columns indirectly subjected to crane loading is generally not taken into account. But fatigue failure occurred at the column cap in some workshops.
间接承受吊车荷载的厂房钢柱，一般不考虑疲劳问题，但是在一些车间的钢柱上却出现了疲劳破坏。
3
The early eighties have successfully developed a set of cranecolumn Arm, Arm type cranes, and achieved a national utility model patent.