Technical Note CTN-G-3-18 - 11 pp.; 2018
This Technical Note contains general guidelines and recommendations for common types of structural modifications, including openings for mechanical, electrical and plumbing; openings for stairs and escalators; changes of occupancy; bay removal; column removal; and the addition of one or more floors, to name a few. Basic information on strengthening methods is also presented. A general procedure is provided on how to perform modifications, including the codes and the existing structural information that are needed prior to making modifications. The purpose of this Technical Note is two-fold: to exemplify that numerous types of common structural modifications to existing reinforced concrete buildings are feasible and economical and to address the misconception that selection of a reinforced concrete framing system in a new building means structural modifications cannot be made in the future.