256HC Mast Section How to take precautions against typhoon by tower crane when typhoon comes
typhoon, how to do a good tower crane typhoon prevention measures? The typhoon has the extremely strong destructive force, when receives the typhoon coming information, the construction unit must promptly completes the tower crane to guard against the typhoon measure. Measures for tower crane against Typhoon (1) if the jack-up tower crane has an attachment device, and the free height above the top attachment height exceeds the height of the manual design, two steel wire ropes should be installed in the direction of the building. (2) if the jack-up tower crane is not attached but has reached the maximum independent height of the Product requirements document, four diagonal steel wire ropes shall be installed. (3) for one-time erection of non-self-lifting tower cranes, four steel wire ropes should be pulled diagonally. (4) the steel wire rope above 15 shall be used for the tie-in, and the tie-in shall be located at the root of the first standard section below the turntable; the inside side of the standard section at the tie-in shall be supported by a wooden square larger than the width of the standard section angle steel to prevent pulling the steel structure of the Tower Body;
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The angle between the four tie ropes and the tower body shall be the same, and shall be controlled at 45. ~ 60. The steel wire rope shall be anchored by ground anchors or by a connection with the concrete structure of the building which has reached the design strength. The steel wire rope shall be adjusted by left and right wire hooks to make the steel wire rope loose and moderately tight and ensure that the tower is in a vertical state. (5) where there are hanging objects such as signs and banners on the Tower Body, they shall be removed immediately; where there are any easy-to-drop objects on the tower body, they shall be removed immediately. (6) the bolts of the tower body must be completely tightened and the attachment devices of the tower body should be fully checked to ensure that there is no loosening, no welding and no deformation. (7) it is strictly prohibited to fix the front and rear arms of the tower crane to ensure free rotation. The lightning protection facilities of the tower crane must be ensured to be intact and effective, and the power supply line of the tower crane must be cut off.
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