М-20/3 Anchor insert for a lightning rod of 23-28 m

It is used for the installation of detached lightning rods:
– art. M-20/23..28 – 23-28 m high;
– art. M-22/21..26 – 21-26 m high
To install the foundation also use:
– reinforcing steel of class A (ø10 … 14 mm) for the device of a reinforcing grid and a reinforcing framework of ~ 175 kg;
– concrete of class B20 ~ 3,8 m3;
– crushed stone ~ 0.8 m3