悬臂支架XXX Book
1.XXX Book
1.1 XXX
Based on the actual n of this project。a front bracket needs to be set up on the parapet beam to ce the n length of the front beam and ensure the safety of the project.
1.2 n of Anti-Tipping Coefficient for Hoist Basket
According to the actual n requirements on site。the front beam of the hoist XXX een 1.3m and 1.5m。Therefore。the anti-tipping coefficient of XXX.
It meets the requirements of GB-2003 Hoist Basket Standard 5.2.7: the。of anti-tipping moment of XXX shall not be less than 2 under normal working ns.
K=(G×b)/(F×a)≥2
Where K is the anti-tipping coefficient;
F is the total mass of the hoist platform。lifting mechanism。electrical system。wire rope。and rated load;
G is the mass of the counterweight。kg;
a is the distance from the center of the load-bearing wire rope to the fulcrum。m;
b is the distance from the center of gravity of the XXX fulcrum。m.
The value of the hoist arm n is een 1.3m and 1.5m。as shown in the figure below:
Diagram of Forces (Crossbeam of Bracket)
a。When the n is 1.5m
The weight of the rear bracket of the hoist pole G4=76×9.8=0.745KN
The weight of each counterweight G5=500×9.8=4.9KN
The anti-tipping force F2=G4+G5=5.64KN
The moment of the hoist arm M1=1.5G=1.5×5.277=7.915KN·m
The anti-tipping moment M2=4.5×F2=4.5×5.645=25.4KN·m
N=M2/M1=25.4/7.915=3.19>2 (GB-2003.the safety factor of the structure shall not be less than 2).
XXX-tipping ability of the hoist bracket meets the requirements of the GB-2003 standard.
b。When the hoist arm extends 1.3m
The weight of the rear bracket G4=0.745KN
The weight of each bracket G5=3.92KN
飘窗的制作The anti-tipping force F2=G4+G5=4.665KN
The moment of the hoist arm M1=1.3G=1.3×5.277=6.86KN·m;
钢钙板The anti-tipping moment M2=4.7×F2=4.7×4.665=21.925KN·m;激光夜视
N=M2/M1=21.925/6.86=3.196>2
XXX。XXX-tipping XXX.
1.3 n Book of Wire Rope
1.XXX Testing of Wire Rope: The wire rope used in the hoist basket system has a breaking force of 64.15KN according to the quality certificate XXX.
2.Maximum n of ZLP630 Hoist Basket System:
For the longest hoist basket。the self-weight G1=297×9.8=2.91KN
Two people working in the hoist basket。each weighing G2=75×9.8=0.735KN
The rated weight of the load-bearing material G3=405×9.8=3.969KN
When the hoist basket is working。the load is transmitted to the two support rods of the t
压花牛皮wo brackets through the two wire ropes in the lifting mechanism at both ends。that is。the two hoist points are under force。Considering the possible uneven load caused by two people squeezing on one end。each hoist point is under force:
根据GB-2003《高处作业吊篮》规定，计算吊篮悬臂机构对楼顶部屋面负载。本工程最长吊篮约为6米，其他地方用的吊篮较小，参照负载减轻。6米吊篮重约为5.277KN。根据计算，悬臂对楼顶部屋面每平方米负重为1.172KN/㎡。主体结构楼顶部屋面的设计荷载值为2.0KN/㎡，大于1.226KN/㎡，因此楼顶部屋面受力满足架设吊篮要求。 前支架示意图及计算如下：女儿墙只承受F1的压力，只考虑支撑点。支撑点未变，因此力矩不变。假设最大吊篮6M自重为2.91KN，两人上篮为1.37KN，最大载重为2.45KN。前支架自重为无前支架（女儿墙做前支架），因此最大自重为6.73KN。由吊篮示意图可得出：前支架点的受力为3.92KN。前支架受力底面积为0.36M2，因此5.6KN/M2.女儿墙下梁的承受力为15KN/M2，大于10.8KN/M2.因此，吊篮设备对屋面的负载是安全的。
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