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在 1974版以前的 NFPA13中 ,涉及因地震保护喷水管道的资料极少。地震指南规定首先见之于 1974年版。之后 ,有几处改动 ,直到 1987年 ,增加了地震图 ,以及管道吊架和支架安装指南。1989年 Loma Prieta和 1994年加利福尼亚Northridge的地震允许在真正的地震事件中研究自动喷水灭
In NFPA 13 prior to 1974, there was very little information on sprinkler pipe protection due to earthquakes. Seismic guidelines first met in 1974 edition. Later, several changes were made until 1987, with the addition of seismograms and guidelines for pipe hangers and brackets. The 1989 Loma Prieta and 1994 Northridge, California earthquakes allow the study of sprinkler in real earthquake events