Why can't the grounding device be replaced by steel bar instead of round steel?
The mechanical strength of the steel thread is destroyed. Because the supporting point is only the ground, it is easy to cut the steel directly if the thread is not vertical. Therefore, we need to use angle iron, steel pipe or smooth steel round bar.
When using the steel structure as the ground, and hidden in concrete ground, in addition to the local connection is not what you said most of the other for round steel, screw steel, is the existence of these 1 steel, is more curved surfaces, easy to discharge. 2, the thread steel belongs to high carbon steel, conductivity is inferior to round steel." The problem? Then the building, simply all alone round or flat! Don't get it, do more beneficial and carp, social progress! Therefore, it is a mistake to use the steel bar instead of round steel to join the bar
1, it is the surface problem. The bigger the surface, the easier it is to discharge the point.2, the thread steel belongs to high carbon steel, conductivity is inferior to round steel.
Steel is known as hot rolled ribbed bar. Ordinary hot rolled steel bars are made up of HRB and the minimum yield point of the brand. H, R, and B are the first letters in English for hot-rolled (Hotrolled), ribbed (Ribbed) and reinforced (Bars) three words. Hot rolled ribbed bar is divided into two levels, HRB335 (old No. 20MnSi), three HRB400 (20MnSiV, 20MnSiNb, old No. 20Mnti), four grade HRB500 three grade.
