Who is Seismic Source International?

  • Uniform MFGR Treatment
  • Transparent Fees
  • Maintain Confidentiality
  • Communication
  • Technical Specialist
  • Standard Competence
  • Code Participation
  • Highest Credibility
  • Quality Experts
  • Validate Compliance
  • Adds Value
  • IAS Accredited (ISO 17020)

Piping, Ductwork and Conduit:

The Seismic Source Company is focused on providing our subscribers all the information they may need for seismic restraint design and installation of non-structural components. We are developing reference documents and calculation tools for seismic restraints. The seismic bracing of ductwork, piping and conduit is not high on our priority list because there are already many references available. For many years SMACNA has set the industry standard with their publication "Seismic Restraint Manual Guidelines for Mechanical Systems" to meet the needs of their members (the sheetmetal contractors). In the ensuing years, many manufacturers have published manuals with their products used to restrain pipe, duct and conduit (see below).

Seismic Restraint Manuals:

Several manufacturers/suppliers of seismic bracing components have submitted their manuals for review and "pre-approval" by California's Office of Statewide Health Planning and Development (OSHPD). This pre-approval provides designers with some assurance that the procedures and details contained in the manuals comply with applicable building codes for hospital buildings in California. Details and procedures in these manuals are easily adaptable for any seismic force level.

Manufacture's with Application Manuals


Pipe Spacing

Pipe spacing is usually based on current industry standards and/or specific spacing limitations defined in the plumbing and electrical codes. The Seismic Source Company is developing an evaluation of the pipe spacing using the industry standards. We have found that the spacing would have a dynamic response because the flexibility of the lengths are more flexible than a rigid installation defined as 16 Hertz "natural frequency" by code. This is more apparent in refrigeration piping where the wall thickness of the piping is much thinner than standard schedule 40 pipes. The same is true for thin walled conduits. We are developing a technical bulletin defining the spacing requirements for pipe and conduit to meet the rigid natural frequency requirements and stress evaluation to include earthquake forces. We include options for even more rigid installations where the natural frequency matches the forcing function frequencies (i.e. condenser fans) which cause vibration problems in piping so *** Subscribe Today ***.