益民小区23号楼和45号楼南北排列、长度相等,外墙至外墙的距离约60m,23号楼宽度为10.7m,45号楼宽度为10.2m,两楼边线至边线距离为24m。采用臂杆长为48m的QTZ60/40塔式起重机。如果按常规做法把起重机立在两楼的中心点,这样起重机的起重范围包括两楼的4个外角还余出10.53m。在 Yimin District, Building 23 and 45, North and South arranged in the same length, the distance from the external wall to the outer wall of about 60m, 23 width of 10.7m, 45 width of 10.2m, two floor edge to edge distance of 24m . QTZ60 / 40 tower crane with arm length of 48m. If, as is conventional, the cranes stand on the center of the second floor, the lifting range of the crane will include 10.53m of the four outer corners on the second floor. in