290HC Mast Section Erection of tower crane equipment
When tower crane is used in construction, some erection needs to be carried out in the early stage. The following installation steps are summarized:
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1. Underframe installation: assemble the underframe on the foundation, level the support feet with level gauge and lock the anchor fixing bolts.
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2. Installation of standard section:
A. place 1 standard section on the ground frame and fix it;
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B. align the balance arm with the standard section of the tower body and anchor it well;
C. put the suspender through the lifting rope and fix it on the main rotating rod near the end of the balance arm of the standard section, and fix it with the fixture;
D. lift the second standard section to the first standard section and fix it, then lift the suspender by 1m. Pay attention to fix the guide fixture on the upper part before lifting;
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E. lift the support section to the second standard and fix it, and then fix the distance of the suspender lifting section;
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F. install three diagonal bracing rods, and do not install the fourth one at one end of the fixed suspender temporarily;
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H. install the fourth diagonal support, and then calibrate the verticality of tower body with theodolite to 1 / 1000.
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3. Erection of lower turntable and slewing support: assemble the slewing mechanism on the upper turntable and fix it on the slewing support with the suspender at one time. Note that the cantilever height of the suspender shall not exceed 2.5m.
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