梁机是一种为桥梁建设而专门设计的一种门式起重机。提梁机主要由拼装式主梁、支腿、天车等组成，构件间采用销轴及高强螺栓连接，易于拆装、运输；与普通门式起重机相比，安装方便快捷，经济实用。适用于经常流动的道路桥梁建设单位。提提梁机既可两台配合抬吊预制梁，也可以单台起重机配双吊具起吊预制梁，两台同时起重的提梁机各自的起重量一般为450吨，单台起重的提梁机起重量通常可达900吨。它配置支腿行走、天车行走及天车起吊设备，可以实现全方位机械化动作。主要用于将预制梁从制梁台提吊至存梁台位，预制梁养护完成后将其从存梁台位吊运到运梁车上。作为起重设备完成架桥机的组装和拆卸。还用于架设墩身不高的旱桥。Beam crane is a gantry crane specially designed for bridge construction. The beam lifting machine is mainly composed of assembled main beams, support legs, overhead cranes, etc. The components are connected by pin shafts and high-strength bolts, making it easy to disassemble and transport; Compared with the ordinary gantry crane, the installation is convenient, fast, economical and practical. Suitable for road and bridge construction units that frequently move. The lifting machine can be used to lift prefabricated beams with two cranes, or with a single crane and two lifting tools to lift prefabricated beams. The lifting capacity of each of the two lifting machines lifting at the same time is generally 450 tons, and the lifting capacity of a single lifting machine can usually reach 900 tons. It is equipped with leg walking, crown block walking, and crown block lifting equipment, which can achieve all-round mechanized movement. Mainly used to lift prefabricated beams from the beam making platform to the beam storage platform, and after the maintenance of the prefabricated beams is completed, lift them from the beam storage platform to the beam transport vehicle. Complete the assembly and disassembly of the bridge erecting machine as a lifting device. It is also used for erecting dry bridges with low pier bodies.