REDUNDANCY CAN 'BUY' TIME BETWEEN ATTACKS AND COLLAPSE

摘要

The best wayto buy evacuation time for occupants of a building after a major surprise attack is to design redundancy into buildings, say engineers. The issue is not whether the building is framed in steel or concrete, or a combination of the two. The issue is whether it is necessary and feasible to require redundant structural, firenghting and building evacuation systems in supertall or high-profile commercial buildings.