Structural Safety and Fire Protection of Existing Buildings - Special Challenges for Planning

Construction work in existing buildings turns out to become a main issue in planning and execution. The following paper covers some aspects regarding as-built care for existing buildings, structural safety and fire protection, which have to be particularly considered when planning for existing structures. Therefore the basics of as-built care for existing buildings are outlined with focus on the structural design task. In the following article some means are shown to reduce partial safety factors using modem semi-probabilistic methods on existing members as well as appropriate loading tests. In following an optimal approach the fire resistance duration should be evaluated considering most likely lower but realistic fire loads.