扁鐵理論重量

1、(四)熱軋扁鋼規(guī)格、重量表冶標(biāo)(GB)704-65(四)熱軋扁鋼規(guī)格、重量表冶標(biāo)(GB)704-65寬度(mm) 厚 度4567891011121416182022252830重 量 (kg/m)120.380.470.570.660.75140.440.550.660.770.88160.500.630.750.881.001.151.26180.570.710.850.991.131.271.41200.630.790.941.101.261.411.571.731.88220.690.861.041.211.381.551.731.902.07250.790.981.181.371.57

2、1.771.962.162.362.753.14280.881.101.321.541.761.982.202.422.643.083.53300.941.181.411.651.882.122.362.592.833.363.774.244.71321.011.251.501.762.012.262.542.763.013.514.024.525.02（35）1.101.371.651.922.202.753.303.95361.131.411.691.972.262.512.823.113.393.954.525.095.65401.261.571.882.202.512.833.143.

3、453.774.405.025.656.286.917.858.79451.411.772.122.472.833.183.533.892.244.955.656.367.077.778.839.8910.60501.571.962.362.753.143.533.934.324.715.506.287.077.858.649.8110.9911.78（55）1.732.162.593.023.454.325.196.05561.762.202.643.083.523.954.394.835.276.157.307.918.799.6710.9912.3113.19601.882.362.83

4、3.303.774.244.715.185.656.597.548.489.4210.3611.7813.1914.13631.982.472.973.463.954.454.945.445.936.927.918.909.6910.8812.3613.8514.34652.042.553.063.574.084.595.105.616.127.148.169.1910.2111.2312.7614.2915.31702.202.753.303.854.404.955.506.046.597.698.798.8910.9912.0913.7415.3916.49752.362.943.534.

5、124.715.305.896.487.078.249.4210.6011.7812.9514.7216.4917.66802.513.143.774.405.025.656.286.917.548.7910.0511.3012.5613.8215.7017.5818.84852.673.344.004.675.346.016.677.348.019.3410.6812.0113.3514.6816.6818.6820.02902.833.534.244.955.566.367.077.778.489.8911.3012.7214.1315.5417.6519.7821.20952.983.7

6、34.475.225.976.717.468.208.9510.4411.9313.4214.9216.4118.8420.8822.371003.143.934.715.506.287.077.858.649.4210.9912.5614.1315.7017.2719.6321.9823.551053.304.124.955.776.597.428.249.079.8911.5413.1914.8416.4918.1820.6123.0824.731103.454.325.186.046.917.778.649.5010.3612.0913.8215.5417.2719.0021.5924.

7、1825.911203.774.715.656.597.548.489.4210.3611.3013.1915.0716.9618.8420.7223.5526.3828.261253.934.915.896.677.858.839.8110.7611.7813.7415.7017.6619.6321.5024.5327.4829.441304.085.106.127.148.169.1810.2111.2312.2514.2916.3318.8720.4122.4525.5128.5730.621404.405.506.597.698.799.8910.9912.0913.1915.3917

8、.5819.7821.9824.1827.4830.7732.971504.715.897.078.249.4210.6011.7812.9514.1316.4918.8421.2023.5525.9129.4432.9735.331605.026.287.548.7910.0511.3012.5613.8215.0717.5820.1022.6125.1227.6331.4035.1737.631705.346.678.019.3410.6812.0113.3514.6816.0118.6821.3524.0226.0929.3633.3637.3740.041805.657.078.489

9、.8911.3012.7214.1315.5416.9619.7822.6125.4328.2631.0935.3339.5642.391905.977.468.9510.4411.9313.4214.9216.4117.9020.8823.8626.8529.8332.8137.2941.7644.752006.287.859.4210.9912.5614.1315.7017.2718.8421.9825.1228.2631.4034.5439.2543.9647.10注 扁鋼按其表列重量不同分為三組：第一組 每m小于19kg，通常長（非定尺）39m。第二組 每m小于1960kg，通常長（非

10、定尺）37m。第三組 每m大于60kg，通常長（非定尺）35m。括號(hào)內(nèi)型號(hào)為非標(biāo)準(zhǔn)產(chǎn)品，通常長度26m。線性感溫探測器在電纜橋架、電纜隧道及其它電纜火災(zāi)區(qū)域應(yīng)用在電廠企業(yè)和鋼鐵冶金企業(yè)動(dòng)力、配電、控制、通信等方面的電纜遍布全廠，尤其是電纜橋架、電纜隧道、電纜溝、電纜夾層等區(qū)域內(nèi)電纜密集程度很高，火災(zāi)具有發(fā)展速度快、撲滅困難的特點(diǎn)，另外由于這些電纜往往貫穿全廠，火災(zāi)易于蔓延，危害性很大，因此這些場所應(yīng)設(shè)置有效、可靠的火災(zāi)探測器。 傳統(tǒng)的點(diǎn)式火災(zāi)探測器在以上場所不容易安裝，而纜式線型感溫探測器是以上電纜架設(shè)場所的一種適宜的、可靠的報(bào)警系統(tǒng)，且安裝方便。 對(duì)于電纜區(qū)域的火災(zāi)探測，線型感溫探測器可以采

11、用正弦波接觸式敷設(shè)（動(dòng)力電纜不需更換時(shí)）或水平正弦波懸掛敷設(shè)（動(dòng)力電纜需更換或維護(hù)時(shí)）的安裝方式。采用正弦波敷設(shè)的安裝方式，線型感溫探測器安裝在電纜托架或支架上時(shí)，線型感溫探測器以正弦波方式鋪設(shè)于所有被保護(hù)的動(dòng)力或控制電纜的外護(hù)套上面，宜采用接觸式敷設(shè)。探測器安裝時(shí)使用專用的卡具固定，避免探測器受到應(yīng)力而造成機(jī)械損傷。 以正弦波接觸式敷設(shè)的線型感溫探測器的長度按下列公式確定：線型感溫探測器的長度托架寬×倍率系數(shù)×1.15，其中倍率系數(shù)按下表確定。線型感溫探測器以正弦波方式安裝在動(dòng)力電纜上時(shí)，其固定卡具的數(shù)目計(jì)算方法如下：固定卡具數(shù)目正弦波半波個(gè)數(shù)×21。 正弦波接觸式敷設(shè)方式具有火災(zāi)響應(yīng)靈敏度高的特點(diǎn)，但這種附設(shè)方式不利于被保護(hù)電纜的維護(hù)和檢修，在實(shí)際工程安裝應(yīng)用時(shí)，考慮到抽換、添加、維護(hù)、檢修動(dòng)力電纜方便，采用將線型感溫探測器水平正弦波懸掛敷設(shè)的安裝方式，但懸掛敷設(shè)的安裝方式將降低對(duì)電纜火災(zāi)探測的靈敏度。線型感溫探測器懸掛敷設(shè)的安裝方式如下圖所示。線型感溫探測器采用水平正弦波懸掛敷設(shè)的安裝方式時(shí)，為保證火災(zāi)探測的靈敏度和有效性，要求懸掛敷設(shè)的線型感溫探測器距被保護(hù)電纜表面的垂直高度不應(yīng)大于30