電桿達到其開裂狀態的瞬間，荷載只要稍許增加，在純彎段內混凝土抗拉強度弱的截面上將出現di一批裂縫，原先由混凝土承擔的那一部分拉力將轉給鋼筋，使鋼筋應力突然增大了許多，故裂縫出現時電線桿的撓度和截面曲率都突然增大。截面上應力會重分布，裂縫處的混凝土不再承受拉應力，受壓區混凝土出現明顯的塑性變形。彎矩再增大，截面曲率加大，主裂縫開展越來越寬。當截面彎矩增加到某一數值時，受拉區縱向鋼筋開始屈服，鋼筋應力達到其屈服強度。第二階段相當于電桿在正常使用時的應力狀態，體現電桿正常使用極限。

       電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)使用(yong)年(nian)(nian)限(xian)是跟(gen)質量(liang)有(you)關系的(de)，目前普通的(de)水(shui)(shui)泥(ni)電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)使用(yong)年(nian)(nian)限(xian)均在40-50年(nian)(nian)左右，這個期間(jian)是電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)的(de)使用(yong)年(nian)(nian)限(xian)。當(dang)然也有(you)些(xie)(xie)更短的(de)，因為一(yi)些(xie)(xie)小(xiao)的(de)水(shui)(shui)泥(ni)電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)廠家為了(le)提益和計(ji)生成本而(er)使用(yong)劣(lie)質水(shui)(shui)泥(ni)、劣(lie)質鋼(gang)筋生產而(er)成，這樣原材料(liao)本身(shen)就適量(liang)差那(nei)么生產出(chu)來的(de)水(shui)(shui)泥(ni)電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)同樣質量(liang)也會(hui)降低。從而(er)導致影響了(le)電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)使用(yong)周期，縮短水(shui)(shui)泥(ni)電(dian)(dian)(dian)線(xian)(xian)(xian)桿(gan)(gan)使用(yong)年(nian)(nian)限(xian)。

光(guang)纜吊線(xian)(xian)(xian)采(cai)用(yong)(yong)7／2.2鍍鋅鋼(gang)絞線(xian)(xian)(xian)，掛鉤采(cai)用(yong)(yong)25mm塑托掛鉤，每隔(ge)50cm安裝一(yi)只；吊線(xian)(xian)(xian)抱箍(gu)采(cai)用(yong)(yong)D144、D164、D184(根據不(bu)同水泥電線(xian)(xian)(xian)桿桿徑配置)單吊線(xian)(xian)(xian)抱箍(gu)，吊線(xian)(xian)(xian)與抱箍(gu)采(cai)用(yong)(yong)三眼單槽(cao)夾板固定(ding)(ding)，固定(ding)(ding)穿(chuan)釘采(cai)用(yong)(yong)中(zhong)16X60規格的有(you)頭(tou)穿(chuan)釘。桿路(lu)(lu)(lu)吊線(xian)(xian)(xian)架設應(ying)(ying)滿足凈距要(yao)求，在跨(kua)越主(zhu)要(yao)公路(lu)(lu)(lu)纜路(lu)(lu)(lu)間(jian)凈距應(ying)(ying)不(bu)小(xiao)于(yu)5.5m；跨(kua)越土(tu)路(lu)(lu)(lu)纜路(lu)(lu)(lu)間(jian)凈距應(ying)(ying)不(bu)小(xiao)于(yu)4.5m，跨(kua)越鐵路(lu)(lu)(lu)纜路(lu)(lu)(lu)間(jian)凈距應(ying)(ying)不(bu)小(xiao)于(yu)7m。