1. During the first inspection, the records of concealed works should be checked. The roof design should be within the range of direct lightning protection and comply with the provisions of 4.5.7 in GB50057-2010. Check the electrical connection between the lightning arrester and other exposed metal objects on the top of the building, the electrical connection with the down lead, and the equipotential connection of the roof facilities 2. Check whether the position of the lightning arrester is correct, whether the welded joints are full and without any omissions, whether the loose parts such as caps for bolt fixation are complete, whether the anti-corrosion paint applied to the welding part is complete, and whether the section of the lightning arrester is corroded by more than one-third. Check whether the lightning strip is flat, straight, and the spacing between fixed brackets is even. Ensure that the spacing and height of the lightning strip fixed brackets meet the requirements of 5.2.6 in GB50057-2010. Check whether each support component can withstand a vertical tensile force of 49N During the first inspection, the grid size of the lightning protection network should be checked to see if it meets the requirements of Table 1. The distance between the lightning arrester (network, line) of the first type lightning protection building and the protected building, wind cap, vent pipe, etc. should comply with the provisions of 4.2.1 in GB50057-2010 During the first inspection, a theodolite or altimeter and a tape measure should be used to measure the height, length, length, width, and height of the lightning arrester, and the protection range of the building should be calculated using the rolling ball method based on its lightning protection category During the first inspection, check whether the material, specifications, and dimensions of the lightning arrester comply with the provisions of Chapter 5 of GB50057-2010 6. Check if there are any other electrical circuits attached to the lightning arrester During the first inspection, it is necessary to check whether the building's anti side lightning protection measures comply with the provisions of Article 4.2.4, Article 7, 4.3.9, and 4.4.8 of GB50057-2010 When using steel bars in parapets, waterproof layers, or insulation layers as concealed lightning arresters in low or multi-story buildings, the surrounding environment of the building should be inspected to prevent potential accidents such as falling concrete fragments. Except for low-rise and multi-story buildings, other buildings should not use steel bars inside the parapet as concealed lightning arresters 9. The lightning strip should be bent at the corner according to the building shape, with an angle greater than 90 °, and the bending radius should not be less than 10 times the diameter of the round steel and 6 times the width of the flat steel. At the point where the lightning strip passes through the expansion settlement joint of the building, the lightning strip should be curved to the side with a radius of 100mm When trees are outside the protection range of the lightning arrester of the first type lightning protection building, the clear distance between the first type lightning protection building and the trees should be checked, and the clear distance should be greater than 5m