When a ship hit the Francis Scott Key Bridge in Baltimore, MD, its fate was never in doubt. But that was not the case when a barge hit the Eads Bridge near St. Louis, MO, another steel arched truss bridge. The Key Bridge lost one of its main supports, while the Eads Bridge lost one of its truss...

In last month’s article, Designing for Resiliency, I present some of my thoughts on how changing the design approach for wood trusses could aid in making future homes more resilient to the types of climate extremes that seem to be ahead of us. Whether you think that climate change is a...

Q & A with Steve Pryor, P.E., S.E., Senior Manager, Testing and Research Operations, Engineering, Simpson Strong-Tie As a research partner in the National Hazards Engineering Research Infrastructure (NHERI) TallWood project, Simpson Strong-Tie participated in a series of earthquake shake...

As a new year begins, now is the time to ask: do I need a 3rd party auditor? If you don’t have one, then you need to take a hard look at your business. As companies in other industries have learned too, using a third party to conduct all audits throughout an organization (or supplementing...

ANSI/TPI 1 is a practical guide to manufacturing metal plate connected wood truss. It considers rational expectations and reasonable manufacturing capabilities that help ensure a sound product. Due to the nature of wood, cutting equipment and processes gaps do occur. These gaps can cause...

As I approach four decades in this industry (!), the list of building code and design requirements that seem odd to me continues to grow. I am the first to acknowledge that the primary goal in designing a home is, and should be, occupant safety. But there are some requirements and...

Last month’s article, Preventing Truss Collapses, talks about some of the job site mistakes that can lead to truss collapses. I have no scientific data to back this up, but it is my belief that all truss collapses could be prevented by following proper lifting methods and bracing of the...

Recently, when a building owner started getting leaks in the roof and noticed unusual variations in the ceiling, I was asked to do an inspection to determine the best way to correct a deflection problem. Upon inspection, it was very evident that the roof trusses had not been installed correctly...

Over the many years I’ve worked in the truss business, I’ve had the unfortunate experience of visiting numerous job sites where the trusses have collapsed. Without fail, every one of those collapses has been the direct result of improper bracing, improper hoisting, or a combination...

Recently, while conducting an ANSI/TPI audit, a splice caught my eye. When I investigated further, I realized that the bottom chord of the truss I was investigating had a very short, 2” chord segment. I immediately assumed the truss builders had cut a short block to make up for a miss-cut...