Steel columns offset: 1, construction preparation (1) preparation of steel erection construction organization. Its contents include: calculating the number of steel members and connections, select hoisting machinery, determine water program, to determine the lifting method, schedule planning, determine labor organization, planning component yard, to determine the quality standards and safety measures. (2) the basis of test preparation and steel components. Its contents include: the axis of measurement error, prepare the ground bearing surface, the bearing surface and bearing surface elevation and levelness of inspection, measuring bolt position and an extended length of the bearing surface and so on. Foundation bearing surface, bearing and bolt the tolerances comply with the relevant regulations. Before lifting should be based on "steel construction and acceptance" (GB50205-2001) installation requirements, carefully examine the shape and geometry of the steel members, if the deviation install lightning protection equipment before lifting should try to eliminate. (3) if necessary, checking the stability of hoisting steel members, checking formulas please check the relevant information. According to an exemplary pilot deployment of EPRI China Construction Machinery Quality Inspection Center will be the national standard "crane safety monitoring and management system" (issued) to develop appropriate experimental verification program installation of medical equipment, research and development as the basis for mining equipment installation, organization Experimental verification apparatus, equipment and devices, the pilot of the large crane safety monitoring and management system to conduct a comprehensive testing and validation, test verification report issued. Meanwhile sum up, explore the law, gain experience, and to provide technical support for the further improvement of relevant standards and the smooth implementation of the follow-up work. Equipment installed in place _ Shandong Lu lifting (certified) _ Shangluo installation provided by Shandong Lu mechanical equipment installation Limited. Shandong Lu Machinery Installation Co., Ltd. (www.sdlzqz.com) Shandong Jinan, industrial maintenance, installation of leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lifting leadership in Shandong Lu staff warmly welcome all inquiries negotiations to create Shandong Lu lifting a better future.