Installation of lightning rods Installation of lightning rods Installation of lightning rods (lightning receptors) mainly includes the installation of lightning rods and the installation of lightning rods (nets).
(I) Installation precautions for lightning rods are as follows:
(1) The lightning rods on the building and other metal objects on the top of the building should be connected as a whole.
(2) No low-voltage lines or communication lines shall be erected on the framework of lightning rods.
(II) Installation of Lightning Protection Strips and Lightning Protection Nets 1. Surface Mount Lightning Protection Strips (Net) Installation is suitable for installation on the ridges, eaves (slope roofs), roof edges, and parapets (flat roofs) of buildings.
(1) Mounting of lightning protection belts on roof concrete supports The lightning protection belt (net) supports may be cast on site during the construction of the building's roof surface, or may be prefabricated and then reinforced or fixed with the roof waterproof layer.
(2) The installation of lightning protection strips on the parapet or gutter bracket shall be fixed with a bracket when installed along the parapet wall; and the bracket shall be embedded as far as possible with the construction. The stand height of the bracket should not be less than 150mm.
When the conditions are restricted, holes not less than 100mm x 100mm x 100mm shall be reserved in the construction of the wall. The size of the hole shall be the same in the inside and out.
Firstly, the brackets at both ends of the straight section are embedded, and then the intermediate bracket is embedded in the pull-through wire. The bracket at the turning point should be 0.25-0.5 m away from the midpoint of the turn.
The straight-line brackets have a horizontal spacing of 1-1.5m and a vertical spacing of 1.5-2m, and the bracket spacing should be evenly distributed.
When lightning protection belts (nets) are installed on building gutters and fixed with brackets, pre-embedded parts shall be installed along with civil construction. Brackets and embedded parts shall be welded and fixed.
(3) The lightning protection strips shall be installed on the roof ridges, cornices and brackets with concrete supports or brackets.
Casting the support on site, knocking the ridge tile first, so that the support and the mortar in the ridge tile are integrated;
When the bracket is fixed, it is necessary to use an electric drill to drill the hole in the tile, insert the bracket into the hole, and use a cement mortar to stuff it firmly.
Supports and brackets, with a horizontal distance of 1-1.5m and a turn of 0.25m-0.5m.
The junction between the upper end of the down conductor and the lightning protection belt (network) shall be bent into an arc and then welded together with the lightning protection belt (network).
Lightning conductors (nets) in different planes should be connected to each other in at least two places, and connections should be welded.
Prominent metal objects on the roof of a building, such as flag poles, breathable pipes, iron railings, ladders, cooling towers, TV masts, etc. Metal conductors in these areas must be welded to the lightning protection belt (net).
When lightning protection belts (nets) are laid along slope-shaped roofs, the lightning protection belts (nets) should be arranged parallel to the roof and should be bent along with the building styling at the corners. Generally, it should not be less than 90 degrees, and the bending radius should not be less than 10 times the diameter of round steel, or flat. Six times the width of the steel, it must not be bent at right angles.
(5) The method of arresting the lightning protection zone by means of telescopic settlement joints shall bend the lightning protection zone to the side with a radius of 100mm, and the distance between the support center and the building edge shall be reduced to 400mm.
You can bend the lightning conductor downwards.
The installed lightning protection belt (net) should be straight and firm, and should not have the undulation and bending phenomenon. The permissible deviation value of the straightness per 2m inspection section should not be greater than 3%. The total length should not exceed 10mm.
2. Installation of concealed lightning protection belts (nets) (1) Construction of concealed lightning protection belts using parapet steel for roof concealment (2) Installation of concealed lightning protection nets for high-rise buildings Installation of concealed lightning protection nets is based on the use of steel bars in the roof of the building Device. The three parts of the lightning protection net, the down conductor and the grounding device form a steel cage, also called a cage lightning protection net.
For high-rise buildings, precautions should be taken to prevent lateral lightning strikes and to take equipotential measures.
A pressure ring should be placed on every three floors in the first floor of the building.
The reinforcement of the structural ring beam can be connected with the reinforcement acting as the deflector in the column (banding or welding) as a pressure equalizing ring.
For buildings without combined column and ring beam, a 12mm galvanized round steel shall be laid in the outer wall of the building every three floors as a pressure equalizing ring and connected with all the deflectors of lightning protection devices.
Lightning rod installation
(I) Installation precautions for lightning rods are as follows:
(1) The lightning rods on the building and other metal objects on the top of the building should be connected as a whole.
(2) No low-voltage lines or communication lines shall be erected on the framework of lightning rods.
(II) Installation of Lightning Protection Strips and Lightning Protection Nets 1. Surface Mount Lightning Protection Strips (Net) Installation is suitable for installation on the ridges, eaves (slope roofs), roof edges, and parapets (flat roofs) of buildings.
(1) Mounting of lightning protection belts on roof concrete supports The lightning protection belt (net) supports may be cast on site during the construction of the building's roof surface, or may be prefabricated and then reinforced or fixed with the roof waterproof layer.
(2) The installation of lightning protection strips on the parapet or gutter bracket shall be fixed with a bracket when installed along the parapet wall; and the bracket shall be embedded as far as possible with the construction. The stand height of the bracket should not be less than 150mm.
When the conditions are restricted, holes not less than 100mm x 100mm x 100mm shall be reserved in the construction of the wall. The size of the hole shall be the same in the inside and out.
Firstly, the brackets at both ends of the straight section are embedded, and then the intermediate bracket is embedded in the pull-through wire. The bracket at the turning point should be 0.25-0.5 m away from the midpoint of the turn.
The straight-line brackets have a horizontal spacing of 1-1.5m and a vertical spacing of 1.5-2m, and the bracket spacing should be evenly distributed.
When lightning protection belts (nets) are installed on building gutters and fixed with brackets, pre-embedded parts shall be installed along with civil construction. Brackets and embedded parts shall be welded and fixed.
(3) The lightning protection strips shall be installed on the roof ridges, cornices and brackets with concrete supports or brackets.
Casting the support on site, knocking the ridge tile first, so that the support and the mortar in the ridge tile are integrated;
When the bracket is fixed, it is necessary to use an electric drill to drill the hole in the tile, insert the bracket into the hole, and use a cement mortar to stuff it firmly.
Supports and brackets, with a horizontal distance of 1-1.5m and a turn of 0.25m-0.5m.
The junction between the upper end of the down conductor and the lightning protection belt (network) shall be bent into an arc and then welded together with the lightning protection belt (network).
Lightning conductors (nets) in different planes should be connected to each other in at least two places, and connections should be welded.
Prominent metal objects on the roof of a building, such as flag poles, breathable pipes, iron railings, ladders, cooling towers, TV masts, etc. Metal conductors in these areas must be welded to the lightning protection belt (net).
When lightning protection belts (nets) are laid along slope-shaped roofs, the lightning protection belts (nets) should be arranged parallel to the roof and should be bent along with the building styling at the corners. Generally, it should not be less than 90 degrees, and the bending radius should not be less than 10 times the diameter of round steel, or flat. Six times the width of the steel, it must not be bent at right angles.
(5) The method of arresting the lightning protection zone by means of telescopic settlement joints shall bend the lightning protection zone to the side with a radius of 100mm, and the distance between the support center and the building edge shall be reduced to 400mm.
You can bend the lightning conductor downwards.
The installed lightning protection belt (net) should be straight and firm, and should not have the undulation and bending phenomenon. The permissible deviation value of the straightness per 2m inspection section should not be greater than 3%. The total length should not exceed 10mm.
2. Installation of concealed lightning protection belts (nets) (1) Construction of concealed lightning protection belts using parapet steel for roof concealment (2) Installation of concealed lightning protection nets for high-rise buildings Installation of concealed lightning protection nets is based on the use of steel bars in the roof of the building Device. The three parts of the lightning protection net, the down conductor and the grounding device form a steel cage, also called a cage lightning protection net.
For high-rise buildings, precautions should be taken to prevent lateral lightning strikes and to take equipotential measures.
A pressure ring should be placed on every three floors in the first floor of the building.
The reinforcement of the structural ring beam can be connected with the reinforcement acting as the deflector in the column (banding or welding) as a pressure equalizing ring.
For buildings without combined column and ring beam, a 12mm galvanized round steel shall be laid in the outer wall of the building every three floors as a pressure equalizing ring and connected with all the deflectors of lightning protection devices.
Lightning rod installation
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