I've watched other related videos
http://www.youtube.com/watch?v=75ng-6_c-jo
It seems that the cause was improper handling of the earth and heavy rain, the concrete poles snapped because of lateral forces, etc.
Not poor quality, but poor engineering.
http://www.youtube.com/watch?v=75ng-6_c-jo
It seems that the cause was improper handling of the earth and heavy rain, the concrete poles snapped because of lateral forces, etc.
Not poor quality, but poor engineering.