Review Category : Articles

The Eads Bridge was, perhaps, the best-known bridge of the 19th century after the Brooklyn Bridge. A bridge across the Mississippi River had been projected as early as 1839 when Charles Ellet Jr. (STRUCTURE, October 2006) proposed a 1,200-foot span suspension bridge. John A. Roebling (STRUCTURE, November 2006) also proposed a hybrid bridge, with a pier at mid-river, a short time later.

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Engineering Habitats for the Moon and Mars

Several decades after the first space age, there is renewed interest in space exploration and specifically in future human habitation far beyond the Earth’s surface. NASA recently received funding with an ambitious target: to send a manned mission to Mars by the 2030s and allow for future human habitats and even cities.

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The Effects of Base Material Temperature during Installation and In-Service Use

Post-installed adhesive anchor systems have been used for many years for the attachment of threaded rods and reinforcing bars to concrete and other masonry base materials. The code that governs the design of adhesive anchor systems is the American Concrete Institute’s ACI 318-14, Building Code Requirements for Structural Concrete, Chapter 17 “Anchoring to Concrete.” The test reference is ACI 355.4, Qualification of Post-Installed Adhesive Anchors in Concrete.

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The Importance of Project Management

Structural engineers take classes in calculus, physics, statics, mechanics, structural analysis, and structural design during their undergraduate years. In graduate school, they take courses in structural dynamics, earthquake engineering, advanced structural analysis, and advanced structural design. In theory, with this knowledge, the newly minted graduates are ready to make the transition from academia to the realities of working in an engineering firm.

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Updated for 2018 IBC

From 2001 to 2012, the AISI Committee on Framing Standards developed nine different framing standards to cover specific aspects of cold-formed steel framing. Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls.

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Steel casting is considered an innovative, leading-edge technology when used in the design of building structures. However, there are several notable North American buildings that used steel castings that have been in service for over a decade. As steel castings become more commonly used in building design, innovative applications of this technology are emerging.

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According to the Epidemiology of Balcony Fall-Related Injuries, United States, 1990-2006 (American Journal of Emergency Medicine, 2011 February 29), there were 86,500 fall cases (including 8 fatalities) over the period studied. This estimate was based upon injuries requiring emergency medical treatment, and it reports that 5,600 cases involved structural failures. The information available did not allow the study’s authors to assess whether the structural failures were due to overload or to defective floors or railings.

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