門式(shi)(shi)起(qi)重(zhong)(zhong)機是橋(qiao)式(shi)(shi)起(qi)重(zhong)(zhong)機的(de)一種變形，又叫龍門吊。主要(yao)用(yong)于室外(wai)的(de)貨場、料(liao)場貨、散貨的(de)裝卸作業，具有場地利(li)用(yong)率高、作業范圍大(da)、適應(ying)面廣、通(tong)用(yong)性強等特點。太重(zhong)(zhong)生產的(de)門式(shi)(shi)起(qi)重(zhong)(zhong)機，主要(yao)包含：通(tong)用(yong)門式(shi)(shi)起(qi)重(zhong)(zhong)機、水電站門式(shi)(shi)起(qi)重(zhong)(zhong)機等。