There is a big tree in my yard, which just covers the whole house. Worried about the thunderstorm, I want to install a lightning rod. I don't know how to install it, and I need help urgently! !

The selection of lightning protection devices (lightning rod, lightning belt and lightning wire) is generally based on the characteristics of buildings. If the roof of the building is flat-topped, φ 10 hot-dip round steel can be used as lightning protection zone and laid along the surrounding parapet. If lightning protection network is used, the spacing of lightning protection network in general civil buildings is 20*20m or 16*24. The down conductor can be connected with the main reinforcement, and the grounding resistance of common grounding must be less than or equal to 1 ohm. If the down conductor is independent, φ 10 round steel (φ 8 in the national standard) or 40*4 hot-dip flat iron can be selected. If the grounding resistance of the lightning protection area is only grounded, it must be less than or equal to 10 ohm. If it is complicated to make a lightning protection belt with a spire, the lightning rod can be made on the platform of the roof or on the ground. The height of lightning rod is related to the length, width and height of the building and the surrounding geographical environment. If you know the formula for calculating the radius of a ball, you can work it out. Lightning protection zone and lightning rod are both induced lightning. Used for lightning connection, the function is to quickly drain lightning current into the earth. Therefore, the choice of lightning protection zone and lightning rod is not a problem. Note: solar energy, water tank, pouring column reinforcement and other metal objects protruding from the roof should be grounded. They are all equipotential bonded. If you want to do it yourself, it may be very troublesome and heavy workload. I can tell you the specific way, and the specific construction depends on you. 1. Protection area of lightning rod The protection area of lightning rod is an umbrella area with 45 ~ 60 below the lightning rod. The higher the lightning rod is erected, the greater the scope of protection. When installing the lightning rod, it must be noted that the distance between the lightning rod and the protected object should be more than 5m, because the lightning rod and the lower lead can penetrate 2~3m of air through lightning induction. 2. Manufacture and installation of rod lightning rod The lightning rod consists of four parts: lightning receptor (the tip of the lightning rod), support rod, grounding lead and grounding body. Thick copper wire and iron wire are used for the needle tip, and it is best to use thick iron bars; The support rod can be a wood rod or a metal rod; The grounding lead can be made of thick iron wire or other strip metal, with the upper end connected to the needle tip and the lower end connected to the buried grounding body, and the joint must be welded. The grounding lead must use the whole wire, and choose the most moment to connect to the grounding body, and try not to bend. Grounding body is a metal object buried underground, usually made of steel pipe, angle steel and steel needle, and its length should be 1 ~ 2m. Buried depth is not less than 2m. Lightning rod grounding body cannot be mixed with other grounding bodies, and must be grounded separately. 3. Manufacture and installation of metal rod lightning rod For lightning rod with metal rod as its pillar, the metal rod itself can be used to guide lightning current without additional grounding lead. The tip of the lightning rod is welded to the metal bar. Buried grounding body can use steel pipe, angle steel and steel needle. Length should be 1 ~ 2m. Buried in a pit not less than 2m deep, and some salt can be sprinkled in the pit. When choosing the installation position of lightning rod, people should try to leave the roads and entrances where people pass, so as to prevent people from being injured by the step voltage generated near the lightning rod. All metal parts manufactured and installed by lightning rod must be galvanized, and the galvanized layer should be protected during operation. The needle tip is galvanized steel pipe, the thickness of the pipe wall is not less than 3mm, the length of the tin brush on the needle tip is not less than 70 mm, and the lightning rod should be installed firmly vertically. The allowable deviation of verticality is 3/ 1000. The welding requirements should be lap welding, and the lap length must meet the following requirements: the flat steel is twice its width (and at least three sides should be welded). The diameter of round steel is six times that of it. When the round steel is connected with the flat steel, its length is 6 times the diameter of the round steel. Lightning rods are generally made of round steel or steel pipes, and their diameter should not be less than the following values: independent lightning rods are generally made of galvanized round steel, with a diameter of19 mm. B. Roof lightning rods are made of galvanized steel pipes with a diameter of 25 mm. The lightning rod at the top of the water tower C adopts galvanized steel pipe with a diameter of 25mm or 40mm; The lightning rod at the top of chimney D adopts galvanized round steel with a diameter of 25mm or galvanized round steel with a diameter of 40mm; The lightning protection ring E is made of galvanized round steel with a diameter of 12mm or galvanized flat steel with a section of 100mm2, with a thickness of 4mm, and the lightning rod is made of 1). When the lightning rod foundation is constructed according to the drawing requirements, the pre-design shall be carried out. 2) According to the design requirements, the required length of material is divided into upper, middle and lower sections. If the needle tip is a steel pipe, first saw one end of the upper section of the steel pipe into a zigzag shape, then sharpened the weld with a hammer, washed with tin, and then directly welded the other end with the middle and lower sections. 2. Installation of lightning rod Fix the bearing steel plate on the embedded anchor bolt, weld a rib plate, and then install the lightning rod. After straightening and alignment, carry out spot welding, and then correct and weld the other three side plates. Finally, weld the down lead to the bottom plate, remove the coating and brush the antirust paint. 3, bracket installation Angle steel bracket should be dovetail, its buried depth is not less than 100mm, flat steel and round steel bracket buried depth is not less than 80 mm ... All supports must be strong, full of mortar, horizontal and vertical. In general, the top of various supports of lightning protection devices should be100 mm; Stay away from the building surface; The top of the grounding trunk bracket should be 20 mm away from the wall. The horizontal spacing of supports shall not be greater than 1m (concrete supports shall not be greater than 2m). The vertical spacing shall not be greater than 1.5m, and the spacing shall be uniform with an allowable deviation of 30mm. Brackets on both sides of the corner are not more than 250mm away from the corner center. The support should be straight. The allowable deviation of levelness is 3/ 1000 per 2m detection section, and the allowable deviation of verticality is 2/1000 per 3m detection section; But the total length deviation shall not be greater than 10 mm. Iron parts such as supports should be treated with anti-corrosion. The mixture ratio of cement mortar for all buried supports shall not be less than 1: 2. Support installation should be embedded with the structure construction as far as possible. According to the design requirements, elastic line and step-by-step positioning are carried out. Use a hammer. When chiseling holes, the size of the holes should be consistent inside and outside. First bury the supports at both ends of a straight line, and then pull the straight line with lead wire to bury other supports. Before burial and injection, the borehole should be wetted with water. If concrete bearings are used, they shall be arranged in stages. First draw a straight line between the brackets at both ends, and then level the other brackets with mortar. If the parapet is reserved with embedded iron pieces, the bracket can be directly welded on the important iron pieces, and the bracket straightening method is the same as before. Quality problems in manufacturing and installation of lightning rod: insufficient welding, unclean flux treatment, and leakage of antirust paint. Repair welding should be done in time, and the coating should be knocked off and coated with antirust paint. The needle body is bent, and the installation verticality exceeds the allowable deviation. The needle weight should be straightened again, and the protective distance between the independent lightning rod and its grounding device and the entrance and exit of roads or buildings does not meet the requirements. The distance should be greater than 3m. When it is less than 3m, pressure equalization measures should be taken or cobble or asphalt ground should be laid.