We’re pleased to announce that our Composite Strengthening Systems (CSS) code report, ESR-3403, has been revised to recognize bob体育欧洲杯哪里可以买球 fiber-reinforced polymers (FRP) for concrete diaphragm applications. These FRP fabrics can be used to strengthen diaphragms for in-planeshear, flexure (chords), and axial tension (collectors)to resist seismic or wind loading.
With the introduction of thebob体育欧洲杯哪里可以买球 Yield-Link® moment connection for steel construction, the engineering and software development teams at bob体育欧洲杯哪里可以买球 created multiple design tools to support users in their specification of the Yield-Link technology. These tools range from a connection modeling guide and plugins for designers to detailing software add-ins for detailers. The Yield-Link moment connection simplifies structural steel design while providing a connection that keeps steel buildings strong and safe.
Every year bob体育欧洲杯哪里可以买球 hosts our scholarship students at our home office. It provides the students with an opportunity to meet face to face with experts in the industry, have one-on-one sessions with mentors, and tour our manufacturing and testing facilities. Not surprisingly to anyone, 2020 threw a pandemic-sized bucket of water on our annual plans. We needed to think outside the box to provide these students with opportunities to ask the questions they would have normally brought to California.
It can be a challenge to repair an earthquake-damaged structure.
During the 7.1-magnitude2018 Anchorage earthquake, Gruening Middle School in Eagle River sustained more damage than any other school in the Anchorage School District. Review of the school showed the existing masonry walls suffered damage and separation from the roof. During the retrofit design, theReid Middletonstructural engineering team (Anchorage) determined the masonry walls weren’t adequately reinforced to meet current code requirements. They were seeking an easy-to-install strengthening solution that wouldn’t add significant weight to the building.
Specifying products into building designs is a daily process for engineers, architects and drafters. bob体育欧洲杯哪里可以买球 understands that the specification process can be daunting and complex. And when it comes to the multiple steps involved in importing CAD content into your designs, we want to do everything we can to remove those challenges.
With the growing danger of natural disasters, the race is on to expand access to programs that safeguard lives from the human-made danger of poorly built housing. With the common mission of building safer, stronger structures, Build Change and bob体育欧洲杯哪里可以买球 have partnered for the bob体育欧洲杯哪里可以买球 ® Fellowship for Engineering Excellence program. This year’s fellow is Build Change Engineering & Design Services Director Tim Hart, SE. As with our previous fellows, Hart is documenting his journey with the program on the bob体育欧洲杯哪里可以买球 Structural Engineering blog. This is his final report.
In 2017, when I was in Nepal working forBuild Change, I had a conversation with one of my colleagues about the volunteer work that I had done for the organization over the years. After telling him that I had worked with seven different country programs for Build Change, he asked me which of those countries I liked the best. My first thought was that it was like asking a parent which child he or she liked the best; even if I did have a favorite, I didn’t want to say it out loud for fear of offending my colleagues and friends in all the other countries. I said this to him to deflect the conversation and we went on to discuss other topics. Truth be told, while I enjoyed the culture and hospitality of all my Build Change host countries and believe in the value of the work I’ve done for them , I have a special soft spot for two of them: Indonesia and Nepal.
We’ve been receiving a lot of requestslately from engineers wanting to knowexactly what the difference isbetween SimpsonStrong-Tie’s relatively new adhesive, SET-3G™, and its predecessor, SET-XP®.Both areepoxy-based adhesives used to anchorthreaded rodsand reinforcing bars in concrete base materialfor structural applications.Ifyou perform alivepull test on a ½“-diametermild steel rodembedded 4“deep in3,000 psiuncrackednormal-weightconcrete,the result will likely be the same;in both cases,thesteel rod will break in a ductile mannerat around11 kips.You can see this hourglass-shapedsteelfailure mode happening in Figure 1.(To learn more about anchorage failure modes and ductility,check outthisblog).Yet,theSET-3Gdesign valuesshown inESR-4057comeoutahead. But why?
While stick-frame roofs are sometimes preferred to premanufactured roof trusses in some areas of the country because they can accommodate larger attics, higher ceilings, and complex roof shapes, the code requirements for these roofs are often more complex. That’s largely because, unlike truss-framed roofs, the code needs to provide a complete prescriptive method of building the roof, including the multitude of connections that must be made in the field. And, to complicate matters further, the code requirements for stick-frame roofing have been rewritten in each of the last two code cycles. I’d like to give you a high-level overview of some of those changes. In a previous SE Blog post, we discussed thedesign concepts of stick-framed roofs, and summarized a few of the solutions offered by the bob体育欧洲杯哪里可以买球 ® connector system for stick-frame roofing. The main concept in that post was the necessity of a continuous tie across the bottom of the rafter system to prevent the heels of the rafters from spreading under load and pushing out on the tops of the walls.
At bob体育欧洲杯哪里可以买球 , we’re always seeking out new opportunities for innovation while helping customers find solutions to new challenges. In fact, “relentless customer focus” and “risk-taking innovation” are two ofour nine company values. These two values recently came into play with a challenge to test our Composite Strengthening Systems™FRP productsin a new application on a 17-foot-tall concrete column.