T/CMBN 0049-2026 Active Group standards

T/CMBN 0049-2026 Precision Positioning Device for Foundation Bolts of Transmission Steel Pipe Towers

Publish Date: 2026-03-19 Implement Date: 2026-04-03 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CMBN 0049-2026

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Normal diagnostic instruments

ICS Name: \nTransmission lines and distribution lines

Publish Date: 2026-03-19

Implement Date: 2026-04-03

Scope

This document applies to the selection, design, manufacture, inspection, installation, and removal of precision positioning devices for foundation bolts in the construction phase of transmission steel towers with voltage levels of 110 kV to 1000 kV (hereinafter referred to as "positioning devices"). The device can be used for drilled grouted piles, excavated piles, and foundation slabs. It is suitable for bolts with diameters of M24 to M90, made from materials such as Grade 8.8, Grade 10.9, and high-strength steels like 35CrMo and 42CrMo. The foundation concrete strength grade ranges from C30 to C50, and the construction environment temperature is between -20°C and +60°C.