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Baltimore Highlands, MD, United States

Beitel J.J.,Jensen Hughes
ASTM Special Technical Publication | Year: 2016

This paper addresses the current code requirements for the use of exterior insulation and finish systems (EIFS) specified in the 2015 editions of the International Building Code and the International Residential Building Code. A description of the code sections of interest and the fire performance requirements embedded in those sections is provided. These code requirements and their referenced standards have become significant because they now form the basis for the appropriate use of EIFS. In particular, the fire performance of EIFS is addressed and the various fire tests for the components and the EIFS assemblies are described. This includes information concerning EIFS' fire performance in NFPA 285, Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Non-Load-Bearing Wall Assemblies Containing Combustible Components. This is the primary fire test to allow the use of EIFS on exterior walls of Types I, II, III, or IV construction. A brief history and description of the test method is provided as well as EIFS' fire performance in this test method. Additionally, the fire performance of EIFS in several actual fire events such as the Monte Carlo fire, the Palace Station fire, and the Luxor fire is discussed. These fires have vividly demonstrated the issues surrounding the use of decorative features applied to or incorporated onto EIFS wall assemblies. Information concerning the appropriate construction and materials for these decorative features is provided. EIFS are among the most extensively fire-tested exterior wall assemblies used in the United States. As such, lessons with respect to EIFS' construction, fire performance, applicability, and use have been developed and addressed. © Copyright 2016 by ASTM International. Source


Crowley M.A.,Jensen Hughes
Consulting-Specifying Engineer | Year: 2015

NFPA 99-2015 establishes criteria for levels of health care services or systems based on risk to patients, staff, or visitors in health care facilities to minimize the hazards of fire, explosion, and electricity. Here's what's in the current code and what engineers need to know once their authorities having jurisdiction enforce this version. © 2015, Reed Business Information (Cahners). All rights reserved. Source


Anoba R.,Jensen Hughes
International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015 | Year: 2015

Probabilistic Risk Assessments (PRAs) are increasingly being used as a tool for addressing seismic hazards at nuclear power plants. The selection of structures, systems, and components (SSCs) for Seismic Probabilistic Risk Assessment (SPRA) is a critical element for determining the scope and the resources required to perform the analysis. A Seismic Margins Assessment (SMA) is another approach that can be used to address seismic hazards. The seismic margin methodology is designed to demonstrate sufficient margin over the safe shutdown earthquake (SSE) to ensure plant safety and to find any "weak links" that might limit the plant's capability to safely withstand a seismic event larger than the SSE. The selection of equipment for a SMA can be based on a set of shutdown equipment required to safely shut down the plant during a seismic event. The SMA methods used to select and screen SSCs for a SMA, are directly applicable to the development of a SPRA. Some of the insights derived from recent SMAs can be used to guide the development of future SPRAs. For example, the "rule-of-the-box" (ROB) principle is often used to group subcomponents with a primary component or a panel. A control room panel containing 50 subcomponents that would not usually have to be seismically evaluated individually. Based on the ROB principles, with the exception of essential relays, only the panel is seismically evaluated. However, in locations of high seismicity, the panel may not screen, and the subcomponents may have to be seismically evaluated. This, of course, results in an increase is scope of the SSC selection process and the SMA walkdowns. The purpose of this paper is to summarize current SMA SSC selection insights and to review the applicability of these insights to the development of the system models for a SPRA. Source


McDermott R.J.,U.S. National Institute of Standards and Technology | Floyd J.E.,Jensen Hughes
Fire Safety Journal | Year: 2015

We propose a strategy to guarantee realizability of species mass fractions in explicit time integration of the partial differential equations governing fire dynamics, which is a multi-component transport problem (realizability requires all mass fractions that are greater than or equal to zero and that the sum equals unity). For a mixture of n species, the conventional strategy is to solve for n-1 species mass fractions and to obtain the nth (or "background") species mass fraction from one minus the sum of the others. The numerical difficulties inherent in the background species approach are discussed and the potential for realizability violations is illustrated. The new strategy solves all n species transport equations and obtains density from the sum of the species mass densities. To guarantee realizability the species mass densities must remain positive (semidefinite). A scalar boundedness correction is proposed that is based on a minimal diffusion operator. The overall scheme is implemented in a publicly available large-eddy simulation code called the Fire Dynamics Simulator. A set of test cases is presented to verify that the new strategy enforces realizability, does not generate spurious mass, and maintains second-order accuracy for transport. Source


News Article
Site: http://www.labdesignnews.com/rss-feeds/all/rss.xml/all

As the 2016 Laboratory Design Conference approaches, we will continue to make more exciting announcements about what you can expect at this annual gathering of those involved in planning, designing, engineering, constructing and operating laboratory facilities. For now, get to know the professionals who will be delivering the conference's feature presentations. Simon Goodhead, PE, is a code consultant/fire protection engineer and the director of Jensen Hughes’ Atlanta office. Simon oversees engineering operations and designs fire suppression, detection, and alarm systems. His project management responsibilities include reviewing architectural and engineering documentation for compliance with codes and standards, preparing comprehensive fire protection and life safety programs for new and existing buildings, and interfacing with local, state, and federal officials. Simon is one of the first to apply coupled analysis of egress models to fire models within the commercial consulting industry, which enables owners to see, for the first time, how fire and smoke could affect occupants within their buildings during a fire event. After earning his engineering degree in England, Simon worked as a fire protection engineer for four years before moving to Atlanta to work for Harrington Group, and subsequently Jensen Hughes. Simon, Fire Protection Engineer and Director at Jensen Hughes, will be speaking on the topic of “Complexities with Fire—New, Additions, and Adaptive Reuse.” Click here for the full conference agenda. http://www.labdesignconference.com/2016-lab-design-conference-agenda Laboratory Design recently spoke to Simon about his background, professional experience and personal interests. Laboratory Design (LD): How did you first get into your field? Simon Goodhead (SG): When I was three, my Mum (British spelling) tells me I threw a piece of Duplo on the fire. This gassed the whole house and forced us to evacuate. Later, when I was 17, I interned with a Fire Investigator and that sealed the deal—I was going into Fire Safety. Following college, I worked with a couple of consulting engineering firms as a Code Consultant and have been in the built environment ever since. The most recent seven years at Jensen Hughes have been the most interesting. I have developed fire protection approaches for BSL3 and 4 labs, flammable and explosive materials, and toxic materials—all difficult topics that have unique solutions tailored for the specific use. The codes do a good job at getting a baseline, but tailoring a solution will always result in a better, more rounded design. LD: Do you speak at other conferences or trade shows? What are you most often asked to speak about? SG: I do—the most recent was a regional conference and the topic was parking structure fires. In May I will be in Warsaw, Poland speaking about benchmarking comparative Performance Based Designs (a way to design fire safety in buildings with lower construction costs or better aesthetics). Houston will be a blast—especially if barbecue is involved. LD: What was your favorite college class? Was it related to your current career? SG: I really enjoyed Management Strategy as part of my Graduate Degree. Taking complex problems and developing solutions is an integral part of my work, so applying those skills to a business setting was great fun. LD: What do you like to do in your spare time? SG: All of my spare time is spent balancing playing princesses with our 3 year-old and feeding our 6 month-old twins. BT (“Before Twins”) I enjoyed driving, particularly mountain roads in North Georgia. The twins meant the fun car was exchanged for an SUV to fit three car seats … one day I’ll get back to the mountains, but I’m enjoying zonal marking at the moment. LD: Have you ever been to Houston? Do you plan to explore the city in your spare time? SG: I have. Oddly it was for a project that needed a balance between U.K. codes and U.S. codes—as the former British guy I got pulled in. Fortunately, I was rewarded with a tour of the historic area of downtown, barbecue at Goode Company and pecan pie. I had a terrific time and look forward to doing it again!

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