Do you understand deflection and deflection differential — and how your truss systems and, more importantly, your clients’ perceptions will be affected? Deflection has been around for an exceptionally long time and always needs to be considered and addressed. To do so, however, we...

I had a chance not long ago to grab coffee with an old college roommate. We’re both engineers by trade, but our careers took different paths — he went into structural consulting, while I went into component design, working with wood trusses. As often happens, the conversation quickly...

Sometimes, a designed and engineered connection will appear to look like a member to member gap. Because of that, we need to ask the question: should the truss designer always try to eliminate a member to member gap in a truss? Generally speaking, yes, it’s always worthwhile, but there are...

A chase is an intentional opening in a floor truss created by omitting specific diagonal webs to provide space for HVAC ducts, plumbing lines, or electrical runs. For structural efficiency, chases should be located within the middle third of the truss span, where shear forces are lowest....

When given a truss design project, the Truss Designer needs all of the loading parameters before starting work on it. This article will specifically discuss the Thermal Factor (Ct), which is part of the snow load calculations. As with any load parameter, using the wrong value will result in a...

Chapter 3 of ANSI/TPI 1-2022, the National Design Standard for Metal Plate Connected Wood Trusses, provides the component manufacturer with the Quality Criteria they must follow to ensure the metal plate connected wood trusses (MPCWT) they build meet the design assumptions. Section 3.4.2 Lumber...

This article originally appeared in STRUCTURE Magazine and is reprinted with permission. One of the more hotly debated topics in the multi-story wood community is whether wall stud and truss or joist alignment is required over the full height of a building, or whether it is beneficial to...

Many buildings place mechanical equipment—such as air conditioning units, heaters, or ventilation systems—on the roof. These are known as Roof Top Units (RTUs). Installing this equipment on the roof helps save valuable floor space inside the building. RTUs come in a wide range of...

As you’re building your 2026 calendar, be sure to block in time for our next wood construction course sponsored by the Virginia Tech Continuing and Professional Education program. Co-sponsored by the International Code Council, this spring we’re offering “Wood Design, Loads,...

When designing a truss to be used as a free-spanning structural gable or party wall application, additional dead loads may need to be considered. The MiTek engineering software does not account for self-weight of the truss or for any additional weight of sheathing or drywall being applied to one...