How Can Member to Member Gaps Be Corrected?
The Advertiser - June 2017 | Page #30
Compliance with ANSI/TPI 1–2014 requires maintaining member to member gaps at less than 1/8 inch. An exception would be for floor truss chord splices where the limit is 1/16 inch.
While building trusses, the code calls for tight joints. In a...
Are You Creating a Culture of Quality?
On a recent trip to Japan to observe construction manufacturing methods, I was struck by the amount of time a plant manager spends on the production floor. Comparing this Japanese methodology to our truss industry, our plant managers and upper management spend relatively little time engaged in...
All Things Wood:
Unpredictable Nature and Cause of Cracks at Gypsum Panel Ceiling Joints Perpendicular to Framing
In some arid parts of the Southwest, the occurrence and recurrence of cracks at taped gypsum panel (drywall) joints between panels in residential projects have been reported in trade magazines since the mid-1990s. In some homes of a project, one or two cracks or ridges appear at...
Is This Happening at Your Plant?
At a recent TPI 3rd Party Audit, the In-Plant Inspector (IPI) and I were inspecting trusses coming off the line as is normal in an audit. A stacked truss caught my eye, mainly because the top plate did not line up with the plate on the opposite side of the truss. Upon careful examination, indeed...
Do Connectors on Both Sides of a Truss Ever Need to be Placed Exactly?
Once in a while, I’m asked—Is there ever an occasion when connectors on both sides of the truss need exact placement? Well, the answer might surprise you. There are, in fact, several situations where the top face connector and the bottom face connector need to be exactly...
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...
What Decisions Should Truss Builders Be Able to Make?
In the November 2017 article, “So Who Exactly is Responsible for Lumber Quality?”, we discuss the abundance of quality building materials and the responsibility of the fabricator to evaluate their application in products. We should recall the ultimate decision maker in determining...
Errors in Substituting Dead Load for Live Load in Wood Design
Custom kitchens, with high-end appliances, granite countertops, and central islands, are becoming more and more prevalent in the home market today. These products and finishes are heavy and the dead loads from the central islands and/or cabinets positioned along interior...
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,...