Consider a roof with a live load of 20 psf (pounds per square foot). This load is intended to account for construction loading (workers, materials, and equipment placed on the roof during construction or maintenance). If the roof has a large surface area, like a post-frame building, is it really...

One of the features of using Simpson Strong-Tie’s Component Solutions® CS Truss Studio™ software is the ability to add Attic Tie-Beam functionality. [For all images, See PDF or View in Full Issue.] To create an attic truss:      1. Create a new truss or...

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...

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...

The HTTH6.5 heavy tension tie is designed to meet the growing demands of modern construction. This product combines state-of-the-art design with rigorous testing, offering a robust and reliable solution for high-load applications. Its painstaking engineering and precision manufacturing ensure...

Specific gravity (G) is a measure of wood density affected by the specific species or species combination of the commercial grade, growth region, and grading rules. It is the single most important lumber property for the strength of mechanical fasteners, such as nails and screws used in...

This article appears in the May 2024 issue of STRUCTURE Magazine as Part 7 of 9. Reprinted with permission. This multi-part series discusses significant structural changes to the 2024 International Building Code (IBC) by the International Code Council (ICC). This article includes an overview...

At Simpson Strong-Tie, we continually look for ways to improve our offerings for the building industry. During one of our periodic product line reviews, we realized there was a void to be filled in our holdown line for residential construction. Over the last decade, we’ve made strides...

In a recent discussion with several very well-informed industry folks, it became clear to us that interpretation of member-to-member gaps may not be clear. In particular, we need to take a closer look at Chapter 3 Quality Criteria for the Manufacture of Metal-Plate-Connected Wood Trusses of...

This article appears in the April 2024 issue of STRUCTURE Magazine as Part 6 of 9. Reprinted with permission. This multi-part series discusses significant structural changes to the 2024 International Building Code (IBC) by the International Code Council (ICC). This article includes...