How Should Defects Be Recorded When Inspecting a Critical Plate?
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 inspections per station/per shift/per week requirement. On average, the standard requires one...
What is the Most Common Fabrication Issue That Impacts a Truss?
The most common problem typically encountered is excessive defects in the plated area of the truss. While some defects are acceptable in the plated area, the degree of defects depends on the actual joint situation and forces at the joint.
Connector sizes are controlled by design, handling,...
There’s More to Lumber Qualification Than Just the Grade Stamp!
Picking usable lumber involves more than just the initial grade stamp. We can think of the stamp as the first step, but we can’t stop there.
Truss fabricators depend on the lumber supplier to provide effective grading protocols that will produce materials with predictable design values....
Wedges—Misunderstood and Underappreciated?
The lowly wedge sometimes gets very little respect. If your plant is doing it right, the wedges usually are cut from drops or culls. That’s a good way of doing it, and it sounds very simple, but not just any piece of wood is suitable for a wedge. There are important qualifications that...
A Case for Providing More Design Info to the Assembly Table
It’s true that, by nature, the materials currently used for wood trusses can vary in strength and properties. Given a specific lumber size and grade, truss builders often need to evaluate lumber picked, cut, and provided to build the specific job at hand. After verifying the lumber grade,...
No Waste Path Using TIMWOODS
Part 9 in our TIMWOODS Series
Hey TimWoods, it’s time to take a pause with your Gemba walk and talk about a Waste Reduction plan using what we learned in this series.
Throughout this series, our friend TimWoods has helped us focus on the wastes of Transportation, Inventory, Motion,...
So Who Exactly is Responsible for Lumber Quality?
In the United States, we are blessed with an abundance of quality building materials we may chose to use while fabricating our wood truss products. As long as we are able to confidently predict lumber values and our truss design software has the proper values entered, we can be assured a quality...
All Things Wood:
The Pioneer of MSR Lumber
The knowledge we take for granted today on MSR lumber is due in large part to the pioneering work of Professor Robert Hoyle, P.E. In the early 1960s at Potlatch Forest, Inc., he conducted basic research on the relationship between stiffness and strength of lumber, paving the way for the MSR...
How Quality Control is Essential in Your Lean Program
Part 4 in our TIMWOODS Series
Shigeo Shingo, who is considered the world’s leading expert on manufacturing practices and the Toyota Production System, wrote “humans are animals that make mistakes.” But how often do we make mistakes in our lumber yards, millwork, and...
Is This an Allowable Repair?
There is nothing worse than running a truss out the door and then realizing one of the truss members is broken. The question is – can I make a quick fix using a connector plate? The short answer is – no. But there are many who may not realize that specific engineering is required for...