General Guidance on the Use of Rod Stiffeners when Seismically Restraining Pipe, Duct, Electrical Distribution Systems
In mechanical, electrical, and plumbing distribution systems, hanger rods are used to provide the vertical (dead) load support, making the primary force imposed on them a tension force. However, when cables or rigid brace members are used to provide restraint against seismic forces, the hanger rods at the brace locations can be loaded with a …