Working at height features its own threats and there are different hazards brought on by different aspects when operating at elevation, such as debris, deadly drops and electric wires. http://krasathlet.ru/go/aHR0cDovL3ZvcHJvc2ktb3R2ZXRpLnJ1/YSU1QiU1RD1mYWNlYm9vaytvZitzZXgrJTI4JTNDYStocmVmJTNEaHR0cCUzQSUyRiUyRmtiYmw5Y196eF9ydzJfYy05cncuM3Bjby5vdXJ3ZWJwaWN2aXAuY29tTW9yZ2FuODIzJTQwd3d3LnRlbGVjb20udXUucnUlMkYlM0ZhJTI1NUIlMjU1RCUzRCUyNTNDYSUyQmhyZWYlMjUzRGh0dHBzJTI1M0ElMjUyRiUyNTJGd3d3LmZhY2Vib29rb2ZzZXgueWFmb3JpYS5jb20lMjUzRW5ldyUyQmNyYWlnc2xpc3QlMkJwZXJzb25hbHMlMkJhbHRlcm5hdGl2ZSUyNTNDJTI1MkZhJTI1M0UlMjUzQ21ldGElMkJodHRwLWVxdWl2JTI1M0RyZWZyZXNoJTJCY29udGVudCUyNTNEMCUyNTNCdXJsJTI