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1、起重吊装钢丝绳的选用一 钢丝绳类型及选用： 表1-8序号钢丝绳类型一般适宜选用的场合1619+1钢丝绳用作缆风绳、拉索，即用于钢绳不受弯曲或可能遭受磨损的地方2637+1钢丝绳用于滑车组中，即绳子承受弯曲时采用，作为穿绕滑车组起重绳等3661+1钢丝绳用于滑车组和制作千斤绳（吊索）以及绑扎吊起构件（重物）二 钢丝绳的受力及安全系数钢丝绳的受力计算 表1-9钢丝绳的容许拉力，可由下式求得： T= cP/K (N)式中：P产品规格所保证或试验所得的钢丝绳破断拉力（N），如P采用钢丝破断拉力总和，则须乘“换算系数”； K钢丝绳的安全系数，可按表1-10采用 c钢丝绳的换算系数钢丝绳的安全系数K 表1
2、-10使用情况K值使用情况K值用于缆风绳3.5用作千斤绳，无弯曲时67用于手动起重设备4.5用作绑扎的千斤绳810用于机动起重设备56用于载人的提升机14换算系数c按钢丝绳规格而定： 表1-11钢丝绳规格619+1637+1661+1换算系数c0.850.820.80钢丝绳的钢丝强度，按国家标准（GB1102-74）规定分为五级，即1400、1550、1700、1850和2000（MPa）。对钢丝绳在不同公称抗拉强度时的容许拉力，可按下表换算求得：强度换算系数14001550MPa14001700a14001850MPa14002000MPa1.1071.2151.3211.429以上算例系按
3、新绳为准，如所用为旧钢丝绳，则求得的容许拉力应根据绳的新旧程度，乘以0.40.75的系数。附表：附表1 钢丝绳容许拉力查用表 表1-12附表2 钢丝绳主要技术规格 表1-13附表：1 钢丝绳容许拉力查用表 表1-12619+1钢丝绳容许拉力直径（mm）钢丝总断面积（mm2）参考质量(kg/100m)钢丝绳公称抗拉强度为1400MPa时破断拉力（kN）安全系数K在下列数值时的容许拉力（kN）钢丝绳钢丝钢丝破断拉力总和整根绳的破断拉力K=3.5K=5K=8K=106.27.79.311.012.514.015.517.018.520.021.523.024.526.028.031.034.037.
4、040.043.046.00.40.50.60.70.80.91.01.11.21.31.41.51.61.71.82.02.22.42.62.83.014.3222.3732.2243.8557.2772.4989.49108.28128.87151.24175.40201.35229.09258.63289.95357.96433.13515.46604.95701.60805.4113.5321.1430.4541.4454.1268.5084.57102.3121.8142.9165.8190.3216.5244.4274.0338.3409.3487.1571.7653.0761.1
5、20.031.345.161.380.1101.0125.0151.5180.0211.5245.5281.5320.5362.0405.5501.0606.0721.5846.5982.01125.017.026.638.352.168.185.8106.3128.8153.0179.8208.6239.3272.4307.7344.7425.9515.1613.3719.5834.7956.34.97.610.914.919.524.530.436.843.751.459.668.477.887.998.5121.7147.2175.2205.6238.5273.23.45.37.710.
6、413.617.221.325.830.636.041.747.954.561.568.985.2103.0122.7143.9166.9191.32.13.34.86.58.510.713.316.119.122.526.129.934.138.543.153.264.476.789.9104.3119.51.72.73.85.26.88.610.712.915.318.020.923.927.230.834.542.651.561.372.083.595.6 续上表637+1钢丝绳容许拉力直径（mm）钢丝总断面积（mm2）参考质量(kg/100m)钢丝绳公称抗拉强度为1400MPa时破断拉
7、力（kN）安全系数K在下列数值时的容许拉力（kN）钢丝绳钢丝钢丝破断拉力总和整根绳的破断拉力K=3.5K=5K=8K=108.711.013.015.017.519.521.524.026.028.030.032.534.536.539.043.047.552.056.060.565.00.40.50.60.70.80.91.01.11.21.31.41.51.61.71.82.02.22.42.62.83.027.8843.5962.7485.39111.53141.16174.27210.87250.95294.52341.57392.11446.13503.64564.63697.088
8、43.471003.801178.071366.281568.4326.2140.9658.9880.27104.8132.7163.8198.2235.9276.8321.1368.6419.4473.4530.8655.3792.9943.61107.41284.31474.339.060.987.8119.5156.0197.5243.5295.0351.0412.0478.0548.5624.5705.0790.0975.51180.01405.01645.01910.02195.032.049.972.098.0127.9161.9199.7241.9287.8337.8391.94
9、49.8512.1578.1647.8799.9967.61152.11348.91566.21799.99.114.320.628.036.646.357.169.182.296.5112.0128.5146.3163.2185.1228.5276.5329.2385.5447.5514.36.410.014.419.625.632.439.948.457.667.678.489.9102.4115.6129.6150.0193.5230.4269.8313.2359.94.06.29.012.316.020.225.030.236.042.249.056.264.072.381.099.9
10、121.0144.0168.6195.8225.03.25.07.29.812.816.220.024.228.833.839.245.051.257.864.880.096.8115.2134.9156.6180.0续上表661+1钢丝绳容许拉力直径（mm）钢丝总断面积（mm2）参考质量(kg/100m)钢丝绳公称抗拉强度为1400MPa时破断拉力（kN）安全系数K在下列数值时的容许拉力（kN）钢丝绳钢丝钢丝破断拉力总和整根绳的破断拉力K=3.5K=5K=8K=1011.014.016.519.522.025.027.530.533.036.038.541.544.047.050.055.561.066.572.077.583.00.40.50.60.70.80.91.01.11.21.31.41.51.61.71.82.02.22.42.62.83.045.9771.83103.43140.78183.88232.72287.31347.65413.73485.55563.13646.45735.51830.33930.881149.241390.581654.911942.222252.512535.7943.2167.5297.22132.3172.8218.8270.1326.8388.9456.4529.3607.
