Weihai guheng building tells you the safety inspection method of tower crane:

One, spot check key points

Spot check of tower crane in construction site should be carried out in the form of checking data and seeing the site.

1. Look up information.

Inspectors of tower cranes shall obtain relevant information from the construction site, make careful verification and put forward opinions on the existing problems.

(1) related materials of tower crane installation and disassembly units:

(1) the tower crane installation, disassembly units engaged in the tower crane installation, disassembly business qualifications of the relevant certification materials.

(2) tower crane installation, disassembly unit project leader, safety personnel safety production assessment certificate and mechanical management personnel training certificate;

(3) have the construction special operation operation qualification certificate of construction lifting machinery installation and disassembly workers, lifting drivers, lifting signal workers, cable operators and other special operation operators.

(4) the tower crane shall have a special equipment manufacturing license, product qualification certificate, manufacturing supervision and inspection certificate, and has been registered in the local competent construction authorities at or above the county level.

(2) technical files shall be established for tower cranes, and the technical files shall include the following contents:

(1) purchase and sales contract, manufacturing license, product qualification certificate, manufacturing supervision and inspection certificate, operation manual, filing certificate and other original materials;

(2) regular inspection reports, regular self-inspection records, regular maintenance records, maintenance and technical reform records, operation failure and production safety accident records, cumulative operation records and other operating data;

All previous installation and acceptance materials.

(3) special construction plan of tower crane installation and disassembly.

Before the tower crane is installed and disassembled, a special construction plan shall be prepared and the operators shall be guided to carry out the installation and disassembly operations. When multiple tower cranes cross in the same construction site, special plans should be prepared, and anti-collision safety measures should be taken.

2. Watch the scene.

Inspectors entering the site should first check whether there is an acceptance plate for the tower crane. If there is no acceptance plate, it indicates that the construction site acceptance is not standard. If there is acceptance card, compare with the data to see if it is consistent. Then check several important parts and devices respectively, and compare with the management requirements to find the problem.

(1) safety device of tower crane.

The construction site shall install load limiting device, travel limiting device, installation of broken rope protection, broken shaft protection device, lifting moment limiter, lifting height limiter, trolley travel switch, boom amplitude limiting switch, rotary limiter, trip limiter, buffer and stop device, etc. Safety devices should be sensitive and reliable.

(2) hook, pulley, reel and wire rope of tower crane.

Hook, pulley, reel and wire rope in good condition, no serious wear and deformation, wire rope specifications, fixation, winding should comply with the specification and specification requirements.

(3) multi-tower operation.

The multi-tower operation should formulate special construction plan and pass the examination and approval; The minimum erection distance between any two tower cranes shall meet the requirements of the specification.

(4) tower crane attachment.

When the height of the tower crane exceeds the requirements of the product manual, the attachment device shall be installed, and the attachment device shall be installed in accordance with the requirements of the product manual and specification.

(5) tower crane foundation and track.

Tower crane foundation should be installed drainage measures, roadbed box or sleepers should be laid in accordance with product specifications and specifications.

(6) structural facilities.

Deformation and corrosion of main structural parts should be within the allowable scope of the specification; The installation of platform, walkway, ladder and guardrail should meet the standard requirements; Fastening and connection of high-strength bolts, pin shafts and fasteners shall meet the requirements of the specification. High-strength bolts shall be tightened with torque wrench or special tools.

(7) electrical safety.

The tower crane should be powered by tn-s zero protection system. The safe distance or protective measures between tower crane and overhead line should meet the standard requirements. Tower crane should install lightning protection grounding device, and should meet the requirements of the specification; Cables shall be used and fixed in accordance with the specifications.