Wood was not held in high regard in the truss drafting department where I began working. Our fabricator customers often wanted their trusses designed with “old lumber,” meaning the obsolete size of 1-5/8” x 3-5/8”, even though the 1.5” x 3.5” size had been in...

Our industry design standard, ANSI/TPI 1, regulates numerous elements in constructing roof and floor trusses. The following is a brief non-exhaustive summary: Lumber grades and moisture content Pedigree of lumber grades and lumber management Controls on truss profiles Verification of...

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...

CS Producer, Simpson Strong-Tie’s component manufacturing management solution, provides real-time truss plant feedback and production scheduling functionality, in a modern, user-friendly interface. Since its introduction in 2025, CS Producer continues to add new features and...

If you’re a wood truss designer, you know one thing for sure: your workstation is where the magic (or the misery) happens. Long stretches of modeling, preparing quotes, reviewing digital plans, and generating production documents all happen at that desk. And while companies often focus on...

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...

The name “Bill McAlpine” has such resonance in the component industry that when ITW acquired the company and removed his name, they soon found value in returning to the Alpine moniker. There are many reasons McAlpine earned that singular honor, but one of the least recognized is...

Chapter I: The Idea One day a certain builder had an idea for a spec house that would be a sure winner. So, he got together with the best architect in the area and began to describe what he wanted. “Mr. Architect,” he said, “I want the house to have a studio...