AISC’s Steel Solutions Center frequently receives questions related to welding in situations that are not ordinary or where special fixes are needed after something has gone wrong. To address these questions and other welding dilemmas, special care was taken in Design Guide 21: Welded Connections (Second Edition) to expand upon Special Welding Applications. Enhanced since the First Edition, the Design…read more →
In September 2019, SE University welcomed James O. Malley, SE, from Degenkolb Engineers, to present Changes to the Seismic Design of Steel Structures. Jim designated the Earthquake Engineering Research Institute (EERI) Learning from Earthquakes (LFE) Endowment Campaign Fund (http://www.learningfromearthquakes.org/) for the SEU Speaker Inspires donation of the month. Jim shared: “I selected this fund because EERI’s LFE program made a…read more →
Have you encountered fit-up problems in the field for fillet welded connections? What has been your solution? AWS D1.1 requires that the engineer approve any alternative acceptance criteria for production welds, but the Code only provides general stipulations applicable to most situations. Finding an acceptable alternative for fit-up issues often plagues engineers, however in the Second Edition of Design Guide…read more →
In August 2019, Duane Miller, PE, from the Lincoln Electric Company, presented Introducing Design Guide 21: Welded Connections (Second Edition). Duane previously nominated The City Mission in Cleveland (https://www.thecitymission.org) for the SEU Speaker Inspires donation of the month when he spoke for SE University in 2017, and he has chosen to do the same in 2019. Duane shared why he…read more →
When does a shear wall turn into a wall pier? Have you struggled in the past to decide whether the short wall segments that surround a loading dock opening qualify as a wall pier or a column frame element in your tilt-up wall design? Each type of wall element demands different detailing requirements, and more than one element can be…read more →
The design of wall anchorage in tilt-up walls has been influenced most by past failures during seismic events. While many failures were the result of cross-grain bending in wood roof designs, many problems were found also in steel structures, where the steel lacked the necessary ductility and overstrength required during an earthquake. How do ACI and ASCE 7 address the…read more →
Have you reviewed the upcoming changes in the 2018 National Design Specification? Many changes resulted from changes to other reference standards, and it is important to note their impact on future wood design. In the June 2019 SE University session, Lori Koch, PE, from American Wood Council, presented 2018 National Design Specification (NDS) Changes. Lori outlined and explained the changes…read more →
In July 2019, SE University welcomed John Lawson, PE, SE, from Cal Poly – San Luis Obispo, to present Engineering Tilt-Up: Design Provisions Born from Past Experience. John designated The Land Conservancy of San Luis Obsipo County (www.lcslo.org) for the SEU Speaker Inspires donation of the month. John shared that he made this selection because: “I love this local organization…read more →
In June 2019, SE University welcomed Lori Koch, PE, from American Wood Council, to present 2018 National Design Specification (NDS) Changes. Lori designated the Richmond SPCA (https://richmondspca.org/) for the SEU Speaker Inspires donation of the month. Lori shared that she chose this organization because: “They are a great local no kill shelter here in Richmond where I live and they…read more →
What do you use as your default design strength for masonry? Have you checked with local suppliers to see what is commonly available? Masonry strengths can vary widely, but new findings show the design strengths may be higher than what engineers typically assume. In the April 2019 SE University session, Cathleen Jacinto presented Lintels for Masonry Walls. Cathleen reviewed the…read more →
