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) requirements, carefully examine the shape and geometry of the steel components, if any deviation, before lifting should try to eliminate. (3) if necessary, checking the stability of the steel members CNC equipment crane hoisting installation, checking formulas please check the relevant information. Large and small equipment for boilers, pressure tank disassembly, place; the mall elevator disassembly, transport, place; dig loaded container; a variety of large and small machinery, machine tools, precision instruments, printing, dry cleaning machines, injection molding machines, presses, Large air-conditioning, generators, power distribution units, imported equipment and other lifting, lifting, shifting, handling, installation, positioning, leveling; in place of artificial lifting handling equipment transport unloading; various tonnage crane rental; equipment for space crane unable to complete the work hoisting equipment, construction site, a narrow purification equipment installation, construction site is limited, or non-load-bearing floor can not support the crane, we were able to complete manually. Small equipment installation lifting equipment installation _ _ Dongying companies look for Lu Lu from Shandong Machinery Equipment Installation Company. Shandong Lu Machinery Installation Co., Ltd. (www.sdlzqz.com) strong, credible, in Jinan, Shandong industrial maintenance, installation and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shandong Lu machinery and you work into the brilliant, for a better future!