The National Lumber Grading Authority (NLGA) is the grading agency having authority over establishing lumber design values for Hem-Fir (North) lumber and conducting on-going testing to verify the design values. The NLGA follows inspection and grading rules approved by the American Lumber...

We at MiTek Inc. extend a heartfelt thank you to SBCA and all attendees for making BCMC | Framer Summit 2024 a fantastic event. From a dynamic show floor to ample opportunities to network, learn, and connect with our industry, BCMC plays a crucial role in advancing our industry, and we are...

Bearing: A structural support, usually a beam or wall, which is designed by the building designer to carry the truss reactions to the foundation. [For all images, See PDF or View in Full Issue.] MiTek’s engineering software uses two common types of bearings, roller and pinned. There is...

Sustainable building materials and methods are top-of-mind in today’s construction industry. While there are many sustainable building materials to choose from during design, wood is naturally a superior choice for developers, designers, and builders interested in lowering the...

As a global pioneer in the building components industry, we’re looking forward to presenting our integrated solutions suite at the upcoming Building Component Manufacturers Conference (BCMC) | Framer’s Summit 2024. Our booth at the event will feature best-in-class software, automated...

Oftentimes, MiTek engineers are asked what plate embedment tolerance is allowed for metal connector plates in wood trusses. Chapter 3 of the ANSI/TPI 1 (National Design Standard for Metal Plate Connected Wood Truss Construction) addresses the tolerance for metal connector plate tooth...

The 2024 International Residential Code (IRC) is available. One addition to the new residential code deals with the wood framing around stair openings. This addition was submitted as part of a code change proposal by the Stairbuilders and Manufacturers Association (SMA) based on the work and...

Typically, trusses are spaced evenly. The spacing shown on MiTek engineering drawings is a tributary area carried by the trusses. Each truss is designed to support one-half of the roof/floor load on each side. The spacing between the trusses may be of any combination if the tributary area does...

As the “Green” movement progresses and energy prices go increasingly higher, more and more homeowners and commercial developers are looking to utilize photovoltaic panels (solar panels) to help get them “off the grid.” It may seem that designing for solar panels is as...

An attic truss with 7 feet room height – should it be designed for 20 psf (pounds per square foot), 30 psf, or 40 psf room live load? Per International Residential Code (IRC) Table R301.5, the minimum uniformly distributed live load for uninhabitable attics with limited storage is 20...