Building engineers rely on maximum gravity reactions (R+) from Truss Design Drawings (TDD) to design structural components. These maximum reactions are calculated based on load combinations specified by building codes, representing the highest downward forces which allow engineers to determine...

Product testing is the backbone of quality control in engineering and manufacturing, ensuring products are reliable, durable, and safe before reaching the market. Over the years, the testing processes have evolved dramatically, transitioning from manual inspections to highly sophisticated...

A benefit of using Simpson Strong-Tie’s CS Truss Studio™ is managing the relationship between the truss self-weight and the dead load. Truss self-weight is checked against all applied dead loads to verify that there is enough assumed “extra” dead load to account for the...

The ANSI/TPI 1 standard is a critical document that governs the design and quality criteria for metal plate-connected wood trusses. It serves as a guideline for truss manufacturers and engineers alike, providing the technical framework to design and construct reliable and code-compliant trusses...

A common denominator for deck collapses is a special family event, such as a graduation, wedding, birthday party, or family reunion. A properly designed and constructed 14-ft x 24-ft residential deck floor, designed for a 40 psf uniform live load, should safely support 84 occupants based on an...

Uplift reactions are the result of a set of conditions that generally includes load types, load combinations, bearing locations, and web patterns. In most cases, especially those involving wind load combinations, uplift reactions are relatively small and can easily be resolved through the...

Good joint detailing at the design stage can help truss builders accurately position truss plates, including the back plate which is essentially positioned “blindly.” Laser projection is excellent for positioning the top face plate, however, it is subject to the same limitations for...

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...