Specific gravity (G) is a measure of wood density affected by the specific species or species combination of the commercial grade, growth region, and grading rules. It is the single most important lumber property for the strength of mechanical fasteners, such as nails and screws used in...

Sponsored by the Virginia Tech Continuing and Professional Education program, a three-day program on light-frame and mass timber construction design topics will be offered on May 14–16, 2024 in Blacksburg, VA. Joining me as instructors this year are Scott D. Coffman, PE, John Holland, MBA,...

The National Design Standard for Metal Plate Connected Wood Truss Construction, ANSI/TPI 1-2022 has been updated to require a design load check that accounts for a Person Loading of a roof truss chord without structural wood sheathing. As discussed in the ANSI/TPI 1 Commentary, this loading...

AI isn’t new, just in the national news lately. Recently, I visited a former student who did his PhD research on AI applications about 35 years ago at Texas A&M University. During our conversations, he shifted to the AI subject in his current work and suggested I try using...

Once again, Virginia Tech will be offering its popular two-day course on topics related to wood construction. This year’s course, to be held on April 26–27, will focus on practical code-conforming design of wood structures based on provisions of the 2018 National Design...

After a three-year absence, Virginia Tech is offering its popular two-day course on topics related to wood construction. On May 17–18 in Blacksburg, VA, the Structural Design Topics in Wood Construction course will address wood truss design, in-service performance, and installation...

This series of articles, Wood Structure Design Basics, is intended to serve truss designers (TDs) and others who are new to the wood construction industry and/or may not have the opportunity to study the basics of wood design in a formal setting such as a university. The mix of basics will...

Lumber properties are influenced by species and growing region. Species with similar design properties are combined into species groups, as shown in Tables 4A, 4B, and 4F of the NDS Supplement[1]. For example, a common species group in the southeastern U.S. is Southern Pine (SP), which includes...

For more than 40 years, truss partition separation, often loosely referred to as “truss uplift,” has been a practical (and annoying) issue for homeowners and homebuilders. While it was first investigated at the field level and researched in the laboratory in the 1970s, an October...

Whether you’re a novice or a seasoned professional, there’s always more to learn, especially as construction practices continue to evolve. That’s why our colleagues at Virginia Tech are pleased to be able to offer continuing education each spring. In addition, for many course...