I sometimes wonder if I am at risk of becoming the truss designer version of the grouchy old man that sits on the front porch yelling at the neighborhood kids to “get off my lawn.” When I hear some newer designer criticize the limitations of today’s truss layout and design...

The development of the 4 x 2 floor truss system revolutionized the truss industry. Plating to the narrow edge of the chord members presented some issues, but all in all it allowed component fabricators another product offering, expanding their potential business. In the original designs, it was...

To answer the question of which is the better method, we should start with a little background. A critical plate is a plate with a Joint Stress Index of 80% or greater. The ANSI/TPI 1–2014 Standard stipulates that critical plate inspections must be conducted when completing the three...

Every truss design is evaluated for numerous criteria to determine if it is structurally sound. One of those checks is the capacity of the truss to resist buckling at a bearing location. This article focuses on checking out-of-plane buckling when a truss member is loaded in compression...

Due to the nature of wood, lumber characteristics can vary in every piece. Even “in grade” lumber can have drastic variations in performance. How can we deal with and adjust for natural defects and variability? We have discussed roof trusses in previous articles, including...

Visual tools are essential throughout the different phases of design and construction. Today, 3D models play a major role in construction projects, as they help improve productivity. Component manufacturing is no exception. The 3D Viewer Tool was developed and modernized to help component...

The first thing to consider with bearing sizes is the minimum required by the building codes. Per 2018 IRC, International Residential Code for One- and Two-Family Dwellings, Sec. R802.6 – When a ceiling joist is supported directly on wood or metal, the minimum bearing size required is...

As one of the top 10 private homebuilders in the US (and one of the top 25 overall), Gehan Homes has explored its fair share of technologies promising efficiency and productivity gains. When it came to pulling home designs, plans, elevations, and options into full job start packets (JSPs), the...

A Truss Design Drawing (TDD) includes specific information[1] for structural engineers and building designers: truss profile, plates, loadings, wind speed, codes, enclosure, exposure, reactions, deflections, materials, bracing, bearings, etc. The maximum reactions are the most important values...

It’s a simple fact—successful projects depend on good communication. What’s not so simple—there’s a tremendous volume of information that must be shared between multiple stakeholders in any construction project. Last month’s article, The 3D Model Everyone Can...