Lightning protection of thatched roofed structures

摘要

AbstractudThis work describes the design of external lightning protection system for thatchedudroofed structures. Lightning is a natural phenomenon that has an unpredictable strikeudlocation. Therefore in creating an external LPS, it is possible to create a path for theuddischarge that minimizes its harmful effects to a structure. There are many internationaluddocuments and standards that describe methods of providing lightning protection. It hasudtraditionally been accepted practice to install lightning protection masts near a thatchedudstructure. However in solving one problem a number of others may have been created.udThis work explores alternative lightning protection designs for thatched roofed structures.udTests were performed in a laboratory environment to determine the level at which thatudwill ignite from a direct strike to thatch material. These tests were performed using audcombination impulse generator. It was found that thatch started to smoke at 10 kA. Andudignition of the thatch occurred at 20 kA with a charge of 45 C.