承在廠房或棧橋上運行，

稱作半門式起重機。

門式起重機的門架半(ban)龍(long)門(men)起(qi)重(zhong)機(ji)是(shi)介(jie)於(yu)橋(qiao)式(shi)起(qi)重(zhong)機(ji)與(yu)龍(long)門(men)起(qi)重(zhong)機(ji)之(zhi)間(jian)的(de)一(yi)種(zhong)起(qi)重(zhong)機(ji)，半(ban)龍(long)門(men)式(shi)起(qi)重(zhong)機(ji)隻(zhi)有(you)一(yi)條(tiao)支(zhi)腿(tui)，起(qi)重(zhong)機(ji)另(ling)一(yi)端(duan)像(xiang)橋(qiao)式(shi)起(qi)重(zhong)機(ji)一(yi)樣(yang)架(jia)在(zai)廠(chang)房(fang)的(de)吊(diao)車(che)梁(liang)上(shang)，架(jia)在(zai)廠(chang)房(fang)上(shang)的(de)運(yun)行(xing)軌(gui)道(dao)俗(su)稱(cheng)天(tian)軌(gui)
，在(zai)地(di)麵(mian)上(shang)的(de)運(yun)行(xing)軌(gui)道(dao)稱(cheng)地(di)軌(gui)。半(ban)龍(long)門(men)式(shi)起(qi)重(zhong)機(ji)起(qi)升(sheng)機(ji)構(gou)、小xiao車che運yun行xing機ji構gou和he橋qiao架jia結jie構gou
，與yu橋qiao起qi重zhong機ji基ji本ben相xiang同tong。由you於yu跨kua度du大da，起qi重zhong機ji運yun行xing機ji構gou大da多duo采cai用yong分fen別bie驅qu動dong方fang式shi
，以yi防fang止zhi起qi重zhong機ji產chan生sheng歪wai斜xie運yun行xing而er增zeng加jia阻zu力li，甚shen至zhi發fa生sheng事shi故gu,為(wei)防(fang)止(zhi)在(zai)強(qiang)風(feng)作(zuo)用(yong)下(xia)滑(hua)行(xing)或(huo)翻(fan)倒(dao)，裝(zhuang)有(you)測(ce)風(feng)儀(yi)和(he)與(yu)運(yun)行(xing)機(ji)構(gou)聯(lian)鎖(suo)的(de)起(qi)重(zhong)機(ji)夾(jia)軌(gui)器(qi)。半(ban)龍(long)門(men)式(shi)起(qi)重(zhong)機(ji)一(yi)般(ban)為(wei)電(dian)動(dong)葫(hu)蘆(lu)式(shi)，因(yin)此(ci)額(e)定(ding)起(qi)重(zhong)量(liang)通(tong)常(chang)在(zai)16噸以下。[1]