JP3111387U - Vertical lightning section in high-rise building - Google Patents

Abstract

An object of the present invention is to provide a lightning arrester that installs a conductor on a wall surface as a countermeasure against a side lightning strike on the wall surface in a high-rise building.
Using a side surface of a PC plate, a metal plate (vertical conductor) having a certain thickness is attached between the PC plates, and a part of the metal plate is exposed to function as a lightning receiving portion on the wall surface. If the metal plates are structured so that they can be easily connected in the vertical direction, they function as down conductors and can be easily connected to a building structure (rebar, steel frame).
[Selection] Figure 1

Description

The present invention is intended to easily attach a conductor to be installed on the wall surface as a countermeasure against side lightning strikes on the wall surface of a high-rise building.

In July 2003, the JIS standard JIS A4201 of lightning rod equipment was revised, and lightning rod equipment to be attached to the wall surface was required for lightning strikes on the wall surface for high-rise buildings over 60m.
However, the conventional lightning rod equipment has specifications for mounting on a rooftop surface, and it has been difficult to apply to vertical wall surfaces.

It is very difficult to install conventional lightning rod equipment on a vertical wall from the viewpoint of aesthetics, workability and long-term safety.

Conventional lightning rod equipment is in the form of an iron tube, wire or strip having a certain length.
It is almost impossible to construct an iron pipe with a certain length on a vertical wall.
Installation of conductors in the form of wires and bands is not impossible, but it will not be aesthetically pleasing in high-rise buildings, and anchor bolts will be installed on the wall of the support hardware on the construction surface, and there will be no scaffolding when the outer wall is finished. Have difficulty.
In addition, corrosion, looseness, water resistance, etc. of the exposed bolt part also become a major problem in the long term.

Many lightning rods on the rooftop are connected to the building structure (rebar, steel frame) inside the building on the rooftop, and the building structure is used as the down conductor.
When the lightning is provided on the wall surface, it must be connected to the internal structure of the building, but this connection work becomes very difficult.
Although a method using a reinforcing bar inside the PC board is also conceivable, it is expected that the process becomes complicated and the construction cost becomes high.

Conventional linear and strip-like horizontal conductors have small defects from the mounting surface, so that the electric field with the mounting surface is almost equal, so that the generation of corona current is small and it is difficult to be a lightning strike point.

Reinforcing bars cannot be used as down conductors in PC column construction where reinforcing bars are connected by coupling.
For this reason, in this construction, a dedicated down conductor line is constructed inside the building.
This construction has many problems from lightning rod equipment and architectural aspects.

Using a side surface of the PC plate, a metal plate (vertical conductor) having a certain thickness is attached between the PC plates, and if a part is exposed, it functions as a lightning receiving portion on the wall surface.
If the metal plates are structured so that they can be easily connected in the vertical direction, they function as down conductors and can be easily connected to a building structure (rebar, steel frame).

The present invention can be easily achieved by an economical and safe construction method for the lightning receiving part of the wall and the lead-down conductor.
Moreover, if this conductor is arrange | positioned horizontally and conductors are connected in a horizontal direction, the connection of drawing conductors will be attained.

The walls of current high-rise buildings are mostly made by attaching factory-produced PC boards.
The M10 anchor bolt receiving portions are embedded in the thickness portion of the PC plate at an interval of about 50 cm, and the belt-like vertical conductor of FIG.
The protrusion of the vertical conductor from the wall surface should be about 5 cm, and the aesthetic appearance will not be impaired if the fabric is coated in the same manner as the wall surface.
In order to enhance the lightning-receiving effect, the conductor exposed from the PC board is bent so as to have the same angle from the PC boards on both sides.
The material and thickness of the material of the vertical conductor shall be as follows in conformity with JISA4201.
Iron: 4 mm or more, Copper: 5 mm or more, Aluminum: 7 mm or more

This vertical conductor is installed at the PC board factory or at the site just before installation.
Therefore, all conductor installation work can be performed safely on the ground.
As for durability, there is no concern about loosening or waterproofing due to the wind inside the building where the installation part is sealed.

As shown in FIG. 1, the inward connection plate-1 is attached using the upper and lower mounting holes of the vertical conductor.
The connecting plate-1 is made of the same material as the vertical conductor and has a width of about 30 mm and a length of about 200 mm.
The connection between the vertical conductors is completed by connecting the connection plates -1 with bolts and nuts using the connection plate-2 made of the same material.

Similarly, a connection line to the building structure (reinforcing bar, steel frame) can be connected from the mounting hole of the connection plate 1 so that the external conductor and the building structure can be easily connected.

In general, the portion of a high-rise building that becomes a strong electric field is a corner portion of the building.
Most lightning strikes on the walls of high-rise buildings have occurred in the corners.
If this vertical conductor is installed only in this corner, lightning strikes on the walls of high-rise buildings can be avoided.

In PC pillar construction, vertical conductors are connected inside the building, and can be used as a down conductor if connected to ground.

It is drawing which shows the attachment condition of the metal plate (vertical conductor) attached to the PC board side surface, the connection of conductors, and the connection condition with a building structure (rebar, steel frame). It is drawing which saw the attachment condition of the metal plate (vertical conductor) from the cross-sectional direction.

Explanation of symbols

1 Vertical conductor 2 PC board 3 Connection board-1
4 Connection line 5 Building structure 6 Connection board-2
7 M10 bolt nut 8 M10 anchor bolt

Claims (5)

  A flat plate or a metal plate (vertical conductor) bent at an angle is attached to the side of the PC plate, and a part of the plate is exposed to the outside. It functions as a lightning part.   For mounting the metal plate, anchor members for mounting bolts are buried at regular intervals in the PC plate manufacturing stage on the side surface of the PC plate.   The vertical conductors can be connected to each other using metal plates made of the same material at the upper and lower end portions of the vertical conductor on the interior side of the building.   It is possible to connect the building conductor (rebar, steel frame) or the lead-down conductor of the lightning rod equipment from the end of the vertical conductor on the inside of the building.   If this metal plate is arrange | positioned in a horizontal direction and it connects mutually, it will become a connection of drawing conductors.

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