Continuing Education

To 3 or Not to 3 [M11]

Specifying a seismic force resisting system (SFRS) with R greater than 3 results in designing for less force. However, it comes at a price! The connections are more expensive due to more stringent strength and detailing requirements. At the same time, foundations can be sized for smaller loads for R-greater-than-3 systems. This session will examine this trade-off and how the selection of a SFRS affects the total building cost, not just the steel tonnage.

This course is based on a past NASCC session.

You must purchase and pass a quiz to receive a PDH certificate for this course.

Intended Audience: Engineers

  • Date: 4/3/2019
  • PDH Credits: 1.5


Patrick Fortney, PhD, PE, SE, PEng and John Hooper, PE, SE


To 3 or Not To 3