How to choose anchor bolts for power fittings tower? What are the manufacturer's suggestions
2024-05-22
The material of anchor bolts shall comply with relevant standards and regulations. Common materials include 8.8 grade and 10.9 grade, and 12.9 grade with higher strength. In the design, the material types of anchor bolts shall be minimized. The same material shall be used for anchor bolts of the same specification in the same project, and the same specification shall be used for anchor bolts of the same foundation tower. How to choose the anchor bolts for the power fittings tower?
In the design, the level difference of anchor bolts shall be increased, and the specifications and models of anchor bolts shall be reduced to reduce the risk of mixing on site. In principle, the specifications of anchor bolts of metal fittings manufacturers are M24, M30, M36, M42, M48, M52, M60, M68 and M76. For anchor bolts of M80 and above, in principle, 10mm is taken upward as the basic differential unit.
In the design, the processing and manufacturing requirements of anchor bolts shall be indicated on the drawings, and the marking method of screw, nut and gasket (backing plate) shall be specified. The marking shall include information such as manufacturer, performance grade and product specification. The relevant parameters shall be rechecked after the anchor bolt specifications of the hardware manufacturer are selected.
When applying the general design of transmission line tower in engineering design, the dimensions of anchor bolt aperture, hole spacing (small root opening) and hole margin on the tower foot plate shall be checked according to the Regulations on Drawing and Construction of Transmission Line Tower (DL/T 5442-2010) and the adjusted anchor bolt specifications.
In the installation of hardware bolts, attention should be paid to the selection of appropriate anchoring methods, generally should be used in concrete embedded anchor plate or steel plate type anchor base. Before fixing the bolts, the actual size of the foot plate should be determined to ensure that the hole spacing and aperture of the bolts meet the design requirements. Before installation, the footplate and base shall be cleaned and inspected, and the coordination between the anchor base and the footplate shall be ensured.
Key words:
Power fittings
Power equipment
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