The paper describes the powerful explosive-force,duced by lightning, will destroy structures.This phenomenon will protrude while large size metal roof conductes as receiving lightning device.

• 通过对一起雷击事故实例的分析，阐述直击雷接闪时产生很强的爆炸力，会对建筑物造成破坏，尤其是大面积金属屋面作接闪器时此问题更为突出。