Review Category : Articles

The newly (2016) established SEI Mentoring Committee aims to develop a formal mentoring program for SEI members and ultimately utilize the lessons learned to formulate a program which can be used to advance the profession. The genesis of this movement was the result of the recently conducted Firm Leader Survey, and also the desire to achieve the goals indicated within the SEI Vision for the Future.

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Wind-induced vibration is an ever-present issue in lighting support design. It can cause seemingly magical movement of lighting poles, even when no storm or extreme wind event is present. Engineers recognize this “pole dance” as resonance. When there is too much of it at high amplitudes of deformation, the structure has a high likelihood of failing.

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Soft-Story Retrofit Solutions

Recent natural events have provided material evidence of the social and economic impact to large metropolitan areas when a city is not prepared or lacks a robust recovery plan. More than 230,000 people migrated from New Orleans within the first nine months after Hurricane Katrina. The census data showed only 100,000 returned within the following eight years.

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A metallized coating (a metallic alloy applied to a base metal or concrete) is intended, in most applications, to be a form of protection to an underlying metal substrate. The act of applying the coating is referred to as metallizing. Metallizing can be achieved in several ways such as hot-dipped galvanizing or thermal arc spraying, applied in situ or in a shop. Zinc, which was first used in construction in 79 AD, is the most used metal for this process. Half of the zinc produced today is used for corrosion protection of steel.

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How Earthquake Early Warning Systems Can Aid Recovery Efforts

Buildings and residents near the Salton Sea began shimmying and shaking during the swarm of earthquakes that burst from Bombay Beach in late September 2016. Soon, the California Earthquake Prediction Evaluation Council (CEPEC) released a statement. It read: “CEPEC believes that stresses associated with this earthquake swarm may increase the probability of a major earthquake on the San Andreas Fault to values between 0.03 percent and 1.0 percent for an M7.0 or larger earthquake occurring over the next week (to 09:00 hrs PDT, Tuesday, October 4, 2016).” 

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The future of short span steel bridge design began in 2009 with a challenge from the Federal Highway Administration (FHWA). FHWA challenged the North American steel industry to develop a cost-effective short span steel bridge with modular components which could be placed into the mainstream and meet the needs of today’s bridge owners, including Accelerated Bridge Construction (ABC). The challenge was issued to help address the U.S. infrastructure crisis of structurally deficient and functionally obsolete bridges, nearly half of which fall in the short span category (defined as bridges under 140 feet).

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Membrane roof systems installed on steel roof decks traditionally result in a uniform transfer of wind (uplift) loads from the roof membrane to the steel roof deck and underlying supporting structure (e.g., steel joists). For example, in a built-up membrane roof system – which has been used commonly in the U.S. roofing industry for more than 125 years – the built-up membrane is continuously adhered to rigid board insulation.

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There is a disturbance in the Force. Can you feel it?” This quote can be applied to many different subjects in the universe, including what is going on in the construction industry here on earth. We do not have floating cars and diplomatic robots fluent in six million languages yet, but the construction industry is being transformed like never before. While there are sure to be growing pains along the way, it is also an exciting time to be in the industry.

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Condensation on interior surfaces can cause corrosion and wood decay if not addressed promptly. Repair and restoration of decayed structural elements are important. Equally important is determining the source of the problem, so it does not reoccur. Condensation is moisture vapor collecting on a cold surface – in this case, wood roof sheathing at the interior of the building.

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STRUCTURE’s February 2017 Engineer’s Notebook discussed the design requirements and methods to laterally brace (bridge) axially loaded cold-formed steel stud walls. This article provides the design requirements and methods to anchor, or complete the load path, for the lateral bracing (bridging) of axially loaded cold-formed steel stud walls.

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