How Important are Construction Tolerances?
Back in the days before Autoset C®, Matchpoint®, and Wizard®, truss set-ups and the truss profile were dependent on the truss builder’s ability to accurately jig the truss being built using cross reference information and data. For example, a heel to peak measurement was taken...
How Smooth are Your Splices?
Quality trusses with smooth splices help ensure quality ceilings and floor finishes, but several factors may affect their execution.
It’s generally understood by most truss builders that, while creating chord splices on any truss, it’s important to maintain a flush plane surface...
Does the Manufacturing Facility’s Environment Affect Quality?
Can quality be determined by examining the environment of the facility manufacturing the product? It seems like the two are unrelated, but, after evaluating hundreds of facilities, quality seems to be proportional to the environment of the manufacturing. By this, I’m not saying that brand...
All Things Wood:
The Critical Job of Truss Builders
Last month’s fine article by Glenn Traylor, “How Do I Choose Which Plates for a Critical Plate Inspection?”, reminded me of investigative experiences I’ve had throughout my career. The work of truss builders is extremely important, as evidenced by instances of truss...
How Do I Choose Which Plates for a Critical Plate Inspection?
The requirement is: an inspector will, on average, inspect one critical plate for every inspection made during a week. That requirement is the baseline number for the quantity of critical inspections to perform—but because some trusses do not have critical plates, it’s necessary to...
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...
How Does a Fabricator Gain From a 3rd Party Audit?
When a 3rd party inspector inspects a licensed plant, what exactly are the auditors looking for? And what can the fabricator get from the experience?
What the inspection is NOT, and why that matters:
The part 1 audit of the in-house paperwork is not a grade on neatness. It’s an...
All Things Wood:
Addressing the Roof Truss Design Note: “Provide adequate drainage to prevent water ponding.”
The purpose of this article to examine the significance and implementation of a typical note that appears on metal plate connected roof-truss drawings when a top-chord-pitch of ¼:12 or less is specified by the Construction Documents. Three questions will be addressed:
What is the...
How Important is Angulation? Why is It Important?
Per ANSI/TPI 1–2014, National Design Standard for Metal Plate Connected Wood Truss Construction, plates should be installed within a 10 degree tolerance. So what happens when the plate is rotated and exceeds this requirement?
The simple answer is: the configuration and design of...
Are Roof and Floor Trusses the Only Components that Need a Quality Assurance Program?
Roof and floor trusses are important components that need special consideration to insure their correct manufacture. Components built to the IRC and IBC require the manufacturer to adhere to specific requirements. These requirements provide a blueprint to facilitate the manufacturing of a...