>>> ENGINEERING IN ACTION <<< Picture above are of an expansion joint in concrete pavement in which deformed bar reinforcement (rebar) was used in lieu of smooth bar dowels to cross over the joint. As the temperature goes from cold to hot, the concrete pavement will increase in volume and will subsequently decrease in volume when transitioning from hot to …
>>> EXPANSIVE SOILS <<< Institutional projects (anticipated building lifecycle of 100+ years) on sites predominated by expansive clay soils, often elect to proceed with a structural foundation over a crawl space as depicted below. These foundation systems come at a substantial first cost premium (typically 2 to 3 times that of a conventional on-grade foundation), however they pose substantially less …
Should structural engineers specify slump in the construction documents?….No, slump should be specified by the contractor and concrete producer. Reasoning below: 1. Slump is not a good indicator of the quality of hardened concrete. This has always been true (as indicated in ASTM C143 – care should be taken in correlating slump results under field conditions to strength), but is …
Problem: Steel bar joists have a 6-9 month lead time for delivery and this restaurant can’t wait that long to open. Solution: JaCody Construction, LP, ExoTech Construction, LLC and DUDLEY team to custom design, fabricate and erect the steel bar joists in less than 3 months.
Tension test of a Simpson-Strong Tie Titen-HD (https://www.strongtie.com/mechanicalanchors_mechanicalanchoringproducts/thdss_anchor/p/stainless-steel-titen-hd) post-installed concrete screw anchor with Bryan Tyson, PE and & Drew Dudley PE, SE for Structural Specialist training at Moffett Field in California. For structural engineers it is insightful to view these anchors loaded to failure. Observing what, and how structures fail is important to quality structural design.
In modern commercial construction there has been a stark increase in the number of items that are deferred by structural engineers when they submit construction documents for permit. What is a deferred submittal? Per the International Building Code a deferred submittal includes “those portions of the design that are not submitted at the time of the application and that are …