Building Integrated Lightning Protection Technology and System Design

This project is a residential area, the project is composed of two towers and commercial podium, is a collection of commercial, office in a body's comprehensive construction, where two towers total height 46.8m. The project according to a class of building lightning protection grounding design, roof lightning protection zone, downlead, equalizing ring, earthing device and embedded parts are associated with the building structure, within the scope of general contracting project, the remaining part is responsible for the completion of the other units, and set aside the corresponding point to the metal railings, curtain wall, room and other parts of the need to ground. Lightning Protection and Grounding System Consists of the Following Components Lightning Protection Zone. In roof tower and podium have not greater than 5 x5m and 6 x4m lightning protection network. Glass curtain wall at the top of the metal frame must be connected with the lightning protection belt. All metal projections on the roof, ventilation pipe, fencing, sink lightning protection belt connected with the roof[1]. Electrical lines are through the roof and its steel distribution box, electrical equipment attached to the housing and connected to the nearby lightning protection devices. Roof installation equipment distribution box power supply side surge protector. Downlead. This podium and the third phase of engineering use column diagonal within two root diameter greater than or equal to 16 main reinforcement welding as downlead jumper, peripheral using steel column as a second phase of tower lightning protection downlead, diagonal two core concrete used in the column diameter greater than or equal to 16 mm main reinforcement as lightning protection downlead. All down lead spacing is not more than 12 m and down lead based grounding network and roof lightning protection devices must follow pathways. Equalizing Ring. Tower set equalizing ring for each layer, layer to the outer ring beam and steel column connection ring formation, and lead line connection, the formation of grading ring. Equalizing ring and each layer potential connection nets are welded together, on the podium roof and above the layer, the downlead lateral leads to 40x4 galvanized flat steel, glass curtain wall and metal frame connected, from equalizing ring place leads embedded parts and peripheral metal doors and windows, railings and other metal components connected, in case of flanking the thunder and lightning shielding effect. Roof Pre-discharge Device. The lightning protection device is installed according to the Lightning Protection Office of Chongqing city and the final instruction of the first party. Specific installation location requires a combination of architectural appearance determined. Equipotential Connection. Each equipment room, each machine tube well by the ground net, through lead bonding plate, by grounding network will indoor metal pipe, equipment, metal shell and PE main equip potential connection. Each floor slab is provided with an equal potential connection net, which is connected with the metal pipe, the metal casing and the PE main line of the pipeline well, the electric shaft and the elevator shaft. The weak current host room, swimming pool, shower, toilet and other set of local and other potential connection. Based Lightning Protection and Grounding. Electrical grounding, security grounding, lightning protection, fire alarm systems and other weak ground share the grounding device. Using underground floor and moderators reinforcement and foundation reinforcement for grounding 4th International Conference on Machinery, Materials and Information Technology Applications (ICMMITA 2016) Copyright © 2017, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Computer Science Research, volume 71