The foundation reinforcement is used as the grounding electrode, and all the reinforcements in the f

If it is a strip base or a plate base selection foundation in the foundation of not less than 16 of the two main reinforcements will be connected all around, the middle is connected with a grid of not more than 10 10 meters, no main reinforcement or no more than 16 steel bars can be connected with hot-dip galvanized flat steel. If it is an independent pile foundation, first of all, at least two steel bars around the bottom of the pile foundation are closed and welded, and then lead out to other pile foundations and lightning protection lines, without each pile foundation to do this, can be done at intervals, if the pile foundation is a lot, it can also be done at intervals. Only two rows of pile foundations only need to connect each independent pile foundation, if it is a multi-row independent pile foundation needs to be connected all around, the middle is connected with a grid of no more than 10 10 meters, and the connection material between the pile foundations is hot-dip galvanized flat steel is more economical and practical.

The lead line connection and the lap multiples of rebar and rebar and rebar and flat bar are not verbose here.

Fiber reinforcement can be used instead of reinforcement.

If the independent foundation is used as the grounding electrode, the hail engineering quantity is shown in Figure 1, which is the sum of the bottom area of each independent foundation from 1 to the wide group 9, and the grounding bus (galvanized flat steel) connected between them is calculated. 2.If the orange is a full foundation or a strip foundation as the grounding electrode, the sum of the bottom area of the full foundation or strip foundation is the engineering quantity of the grounding electrode;

Summary. Hello dear, grounding bus laying is divided into indoor and outdoor. Indoor grounding bus is generally fixed and laid with clips along the wall.

Outdoor grounding bus is generally buried underground, and the excavation and filling of the ditch is based on the width of the upper mouth, the width of the bottom and the depth, and the amount of earthwork per meter of ditch length. The grounding electrode is made of steel pipes, angle steel, round steel, copper plates or steel plates, and the general length is 3-6 in each group, which is directly driven into the ground and connected with the outdoor grounding bus. The use of foundation steel bar as the grounding electrode can be directly connected with the grounding bus.

Hello. Hello dear, grounding bus laying is divided into indoor and outdoor. Indoor grounding bus is generally fixed and laid with clips along the wall.

Outdoor grounding bus is generally buried underground, and the excavation and filling of the ditch is based on the width of the upper mouth, the width of the bottom and the depth, and the amount of earthwork per meter of ditch length. The fiber junction is made of steel pipes, mold angle steel, round steel, copper plate or steel plate, the general length is, each group of 3-6 ranges, directly into the ground, and the outdoor grounding bus connection. Use the basic steel to destroy the code barn as the grounding electrode, and it can be directly connected with the grounding bus.

Can the angle steel driven into the ground be welded directly to the main trunk?

The fixed angle plate at the fixed bracket is only allowed to be welded with the pipe, and it must not be welded with the fixed bracket structure. The fixed bracket does not mean that the spring chaos is completely fixed, but only limits the radial displacement of the pipeline, and the axial expansion and contraction of the only pipe is still allowed.

According to the thunderstorm index in different regions, the design will require the number of groundings. Generally, galvanized flat iron is connected to the foundation steel bar grounding, the resistance test of the grounding electrode has to pass, I can't remember how many ohms specifically, you ask an electrician he must know, and the number of grounding level design will be based on thunderstorm index, construction area, number of layers and other factors.

Like lightning protection down wires, welding and testing can be done.

Chapter IX lightning protection and grounding devices.

1. The production and installation of the grounding electrode is based on the "root" as the unit of measurement, and its length is calculated according to the design length. If the pipe cap is designed, the pipe cap is calculated according to the machined part.

2. The laying of grounding bus and lightning protection wire shall be measured in "10m", and its length shall be calculated according to the additional length of the horizontal and vertical provisions of the construction drawing (including the length occupied by turning, up and down fluctuations, avoiding obstacles and lap joints).

3. The grounding jumper line is measured in "10 places", and all projects that need to be grounded jumper are calculated according to the regulations for each jumper.

Fourth, the processing, production and installation of lightning rods are calculated with "root" or "group" as the unit of measurement, and the installation of independent lightning rods is calculated with "base" as the unit of measurement. The length, height and quantity are all specified in the design.

5. The installation of the semiconductor less long needle lightning elimination device is calculated in the unit of measurement of "set", and the corresponding projects are implemented according to the design installation height. The plant itself is supplied as a complete package by the equipment manufacturer.

6. The main reinforcement in the building is used as the grounding conductor for installation, and the size shown in the design drawing is calculated as the unit of measurement of "10m". Generally, two poles in the column are counted as one length as a group, such as four welds, *2

7. The production and installation of disconnection clips is based on "10 sets" as the unit of measurement, and the number of disconnection clips installed according to the design provisions is calculated, and the installation of disconnection clips in the grounding inspection well is calculated according to one set of each well.

8. The laying of the equalizing ring is based on "10m" as the unit of measurement, and the engineering quantity is calculated according to the extension meter of the centerline length of the ring beam that needs to be equalized and grounded by the design.

9. The grounding of steel and aluminum windows shall be measured at "10 places" (the design of metal windows with more than six floors in high-rise buildings generally requires grounding), and the number of metal windows grounded according to the design provisions shall be calculated.

10. The connection between the main reinforcement of the column and the ring beam is "10 places" as the unit of measurement, and each place is considered to be welded and connected by 2 main reinforcements and 2 ring beam steel bars respectively. If there are more than 2 welded main reinforcement and ring beam reinforcement, it can be adjusted proportionally. The number of "places" where the main reinforcement of the column is connected with the ring beam is calculated according to the design regulations.

Ten. First, the use of foundation steel bar as the grounding electrode is considered according to the full hall foundation, belt foundation, with "m2" as the unit of measurement, according to the size of the foundation to calculate the engineering quantity.

This statement is false.

The grounding electrode function is completed by the grounding body, and the prestressed steel bar cannot take on this important task!

1. The prestressed steel bar will not be buried in the deep and humid soil like the grounding body, so the prestressed steel bar with or without adhesion cannot transmit static electricity to the earth's crust rapidly, and the grounding body cannot be formed;

2. When there is an extremely strong current passing through the steel bar at the moment of lightning strike, the heat generated in the moment will seriously lose the pre-stressed steel bar, and the prestressed steel bar will become an ordinary steel bar!