
An excerpt of the revised equation from 2018 National Design Specification (NDS), Chapter 10.4.1 for calculating apparent bending stiffness (EI)app adjusted for shear deformation, consistent with properties provided in ANSI/APA−The Engineered Wood Association (APA) Performance-rated Glulam (PRG) 320-2017, Standard for Performance-rated Cross-laminated Timber. All graphics courtesy American Wood Council