Articles from Sprinkler Age, the official magazine of the American Fire Sprinkler Association






"Earthquake Sway Bracing
Where Is Earthquake Bracing Required To Be Located On Sprinkler Systems?"
by Daniel C. Duggan

Prior to locating the earthquake sway braces on sprinkler system piping, it is important for the designer to understand what the purpose of the sway bracing is.  Many people offer their opinions on the matter but often their opinions can not be substantiated by the written word in any Code or Standard.  Unfortunately, the written words in the Codes and Standards are often subject to some interpretation.    read more



"Earthquake Sway Bracing
How Is Vertical Motion Resulting From Earthquake Forces Controlled?"
by Daniel C. Duggan

A good deal has been written in recent years about the extremely high vertical ground force accelerations seen in the Northridge earthquake.  Usually the discussion revolves about the number of G's of upward vertical force.  The number of G's of upward vertical force has not resulted in any Code or Standard design guidelines.    read more



"Earthquake Sway Bracing
Do You Know How Strong Your Sway Braces Are?"
by Daniel C. Duggan

In the beginning there were earthquake sway braces, and they were pices of pipe or angle iron and they were strong.  They had ends that were flattened and bent and used "U" bolts through holes in the pipe or angle and could not slip...    read more

 

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