桿旁、控制(zhi)箱旁、電纜(lan)拐彎處、電纜(lan)管直(zhi)線長度超過50米時或兩端電纜(lan)管不在同一平面相距100 mm以(yi)上時,必須設(she)置手孔井。
立桿(gan)監(jian)(jian)(jian)(jian)控(kong)(kong)也叫監(jian)(jian)(jian)(jian)控(kong)(kong)桿(gan),分為(wei)八(ba)角(jiao)監(jian)(jian)(jian)(jian)控(kong)(kong)桿(gan),圓(yuan)管監(jian)(jian)(jian)(jian)控(kong)(kong)桿(gan),等徑監(jian)(jian)(jian)(jian)控(kong)(kong)桿(gan),變徑監(jian)(jian)(jian)(jian)控(kong)(kong)桿(gan),錐形(xing)監(jian)(jian)(jian)(jian)控(kong)(kong)桿(gan),高(gao)度(du)一(yi)般為(wei)3-6米(mi),主要為(wei)交通(tong)道(dao)路(lu),十字路(lu)口(kou),學校,政府,小區,工廠,邊防,機場等需(xu)要監(jian)(jian)(jian)(jian)控(kong)(kong)攝像的地方。監(jian)(jian)(jian)(jian)控(kong)(kong)立桿(gan)的使用提高(gao)了城市安(an)全防范,是居民生(sheng)活的有效保障(zhang)。
基礎5、設(she)計依據(ju):設(she)計風載(zai):23m/s2,疲勞壽命(ming):30年(nian),按國家最新標準版本《碳素結(jie)(jie)構鋼》、《電氣(qi)裝置(zhi)安裝工(gong)(gong)程(cheng)(cheng)電纜線路施工(gong)(gong)及(ji)驗(yan)收規(gui)范(fan)》、《鋼結(jie)(jie)構工(gong)(gong)程(cheng)(cheng)施工(gong)(gong)及(ji)驗(yan)收規(gui)范(fan)》、《鋼筋混凝土(tu)工(gong)(gong)程(cheng)(cheng)施工(gong)(gong)驗(yan)收規(gui)范(fan)》等(deng)相(xiang)關(guan)規(gui)范(fan)進(jin)行施工(gong)(gong)。