The wireless communications industry has experienced exponential growth in recent years. Not only is the number of customers increasing, but the amount of information being transmitted through these networks is also increasing. Whereas a decade ago we used our mobile phones strictly for voice transmission, the introduction of the smartphone has increased the demand on the networks and the supporting infrastructure. …
For many structural engineers, the subject of fatigue analysis has been limited to a few simplified evaluations based on the American Institute of Steel Construction (AISC) Steel Construction Manual that says less than 2,000,000 cycles implies no problem. For concrete structures, the presumption of any fatigue loss was never even a design consideration in typical coursework or practice. …
It is no novelty that communication and visualization in the Architecture, Engineering and Construction industry are continuously evolving. With more challenging project types, owners requesting “the next best thing,” and digital tools and more sophisticated software advancement, it is our duty to stay current and relevant with the latest innovative trends and tools. …
Most structural engineers understand that they should perform their engineering services with no less than the skill customarily exercised by other structural engineers in similar circumstances. Most likely, their employer or a colleague told them so at some point in their early careers, or they overheard other engineers discussing the issue in the context of a legal action. …
I recently asked a group of about 20 structural engineers in Pittsburgh if they thought that structural engineers have any role in addressing energy code requirements. Less than half of them responded affirmatively – this was apparently the first time that many of them had considered such a notion! So we explored the topic further. …
The pursuit of structural licensure in every jurisdiction is a challenge. It means getting all the stakeholders behind it, convincing the licensing board that it is in the best interest of the public, understanding the legislative process, gaining support from legislators to get the bill sponsored and passed, and making sure that the state governor will sign it. In addition to these daunting tasks, there are always those who do not see the benefits of structural licensure and some can be vocal about their opinion. …
Fundamental to every engineering degree is the requirement for advanced mathematics courses. Far beyond basic arithmetic, algebra, and trigonometry, the engineering curriculum requires, at a minimum, courses in differential, integral, and multivariable calculus, linear algebra, and differential equations. With such stringent requirements with respect to mathematical principles and problem-solving tools, it is interesting that counting structural and professional engineers is difficult for so many. …
Continuing on the foundation established in the last article (STRUCTURE, August 2016), let’s now look at two fatigue design methodologies: AISC and Damage Tolerance. AISC is based on the safe life philosophy – if the engineer keeps the stresses low enough, the structure will perform adequately. It also assumes cracking occurs at the end of the structure’s life. …
Lighter, shallower, and cheaper: composite steel joist floor systems can save costs, save materials, and optimize space. These cost-saving reasons for designing a composite steel joist floor system are described in depth along with how these proven systems are best coordinated between the specifier and the joist manufacturer. …
In a commercial building fire, the fate of the structure – and the safety of people in, on, or around the structure – may all come down to a layer of protective intumescent coating. However, how can structural engineers be sure they have used the right amount of coating material to provide the necessary fire protection? It all comes down to complying with available specification data, and not making assumptions when data for a specific steel section profile is unavailable. …