In an ideal world, a building is envisioned and a structural engineer begins the structural design. When the decision to use roof trusses is made, a component manufacturer is promptly involved in the design process. Using the loads and design parameters from the structural engineer, the trusses...

One of the questions I am asked most frequently is “Who is responsible for the truss-to-(fill in the blank) connection? One such example is the truss-to-wall connection. To answer this question, it helps to recognize there are two types of connections: a truss-to-truss connection and a...

With today’s complex profiles and configurations, many truss fabricators have been relying on staples to set assembly member contact and relationships. Stapling serves as a temporary means to insure tight joints and accurate locations. Often times, however, because of the ease of multiple...

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...

With Hurricane Irma wrapping up, the cleanup after Hurricane Harvey’s devastation underway in Houston and more big storms already churning in the Atlantic, it seems like a good time to discuss hurricanes and high wind. There is a great deal of good information out there to help us better...

Vertical deflection resulting from live and dead loads – of both roof and floor framing components – is an important serviceability consideration in the overall design of the building. And while this could be a topic in and of itself, this article is instead going to focus on two...

Over the period of nine days starting on June 9, 2017, five deck collapses in five states (MT, VA, OH. MI, and WI) were reported in the news media. Using the injury data from the media, the five collapses resulted in a total of 57 injuries. In one case, WAVY.com reported that, after an...

Compliance with ANSI/TPI 1–2014 requires maintaining member to member gaps at less than 1/4 inch. An exception would be for floor truss chord splices where the limit is 1/16 inch. Let us take a look at two different situations, the first being a roof truss and the second being a 4 x 2...

Background The model International Residential Code (IRC) permits a design live load of 30 psf for “sleeping rooms.” The model codes specify 40 psf for all other rooms. Of the annoying floor vibration complaints we have received, the most common scenario stems from the use...

A few years ago, we created an article on creative uses of our products. Most of the uses shown were artistic, or functional do-it-yourself projects, with one odd car spoiler modification. This week, I was reviewing some slides in a presentation that I give a few times a year regarding product...