Equipment foundation grounding and steel bar connection?
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For the foundations of large-scale equipment that I’ve worked on in the past, I would start by taking 3 galvanized flat bars from the foundation rebar and then welding them to the foundation’s foot bolts. This year, the engineers designed a ladder-shaped grounding system: two flat steel bars of 40 mm in diameter, each 4 meters long, with a spacing of 2 meters between them; connections are made every 600 mm along their length. The topmost connection is at a height of 1.6 meters above the ground, and all of these elements are buried in the soil. So far, only about 2 meters have been dug; I don’t plan to dig any further as it’s not possible to carry out his designed construction methods. What I’m thinking is to connect the grounding system with the foundation rebar (his design calls for them to remain separate), which should result in a resistance of less than 10 ohms. Could it be done with the guidance of an expert? ? ? ? ?
The poster can study *Code for Design of Lightning Protection in Buildings*
The poster should actively communicate with the electrical designers!
OP, I heard there’s a new Code for Design of Lightning Protection in Buildings; take a look and you’ll understand!
On railways, pile foundations with rebar are mostly used in place of grounding rebar; the required resistance is no more than 1 ohm (which is easily achievable in practice), with pile lengths of 40 meters. This example is provided only for reference
Original poster, you must construct in accordance with the current design specifications or as per the design; otherwise, any problems that arise will be your responsibility!
It is acceptable to use rebar from the foundation as a substitute for grounding flat bars, as long as the regulatory requirements are met. However, if the design is to be changed, it is necessary to consult with the design institute and obtain its approval!