Labels:fence | sky OCR: Avalanching snow from the roof above had caused serious damage to these walls. The canopy was built protect the walls the building from implosion at cost of $250 000 The construction utilized 10 10 3/8 tube steel purlins, covered with half-inch steel plate. These problems may have been remedied with the addition of snow retention devices on the upper roof for tenth of that cost. 24
