27 minute read
PROFESSIONAL ISSUES
What Structural Engineers Need to Know about Resilience
By Erica C. Fischer, Ph.D., P.E., Megan Stringer, P.E., LEED AP BD+C, and Christopher Horiuchi, P.E., LEED AP BD+C
In 2016, many organizations launched rise, and climate preparedness and community resiliency initiatives making “resilience” engagement. In 2014, the city of New Orleans the new buzzword. In the building and also developed a resilience strategy. This plan infrastructure industry, resilience is addresses flood mitigation through the use of defined in many ways. In 2014, the ASCE/ innovative methodologies such as parks and SEI Sustainability Committee defined resil- green streets to protect the city’s population ience as the ability to suffer less damage and and economy. Both New York City and New recover more quickly from adverse events. These Orleans received grant money from the HUD adverse events are not only external shocks National Disaster Resilience Competition to in the form of natural or man-made disas- implement many of their resilience strategies. ters (hurricanes, floods, earthquakes, etc.), but also economic, social, political, and cultural adverse events that could damage the These will have direct implications on the work that civil and structural engineers are performing in the regions. Other areas of the country Figure 1. Battery Park Underpass in New York City after Hurricane Sandy. Courtesy of FEMA. framework of a community. Today, this also have also developed resiliency plans, includincludes the effects of climate change and the ing the city of San Francisco and the states of a seismic retrofit. Once the permit application resulting rapid increase in the frequency of Washington and Oregon. is submitted, the building owner has one year external shocks. How will these initiatives affect structural engi- to complete the retrofit. All retrofits must be President Barack Obama has made resil- neers, their jobs, and their projects? The Disaster completed by 2020. ience a priority in the past year with two Resilience Working Group of the ASCE/SEI In October 2015, the city of Los Angeles events hosted at the White House. The White Sustainability Committee has researched adopted an ordinance that requires the House Summit on Earthquake Early Warning some of the organizations within the building mandatory seismic retrofit of wood-frame Systems was a full-day publically broadcast construction community that are addressing soft-first-story buildings, similar to the ordievent that discussed the benefits of earthquake resilience. This article identifies these organiza- nance in San Francisco, and an ordinance early warning systems on hazard mitigation tions, along with their resilience goals and how that requires the retrofit of nonductile conand disaster resilience. The second event was these goals will affect structural engineers. crete buildings. These ordinances affect over the White House Conference on Resilient 15,000 buildings. Building Codes. This event included the Obama administration announcing public Legislation The cities of Portland and Seattle have developed interactive maps to locate all and private sector efforts to increase com- Cities within the state of California have been of their unreinforced masonry buildings munity resilience through building codes. actively working to increase their seismic resil- (URM). Both cities are currently working on LEED offers three resilience pilot credits for ience. Wiss, Janney, Elstner Associates, Inc. developing legislation for URM ordinances project teams that plan and design for poten- (WJE) developed a website to track seismic mandating retrofits of URM buildings. tial disasters in the project area. This includes ordinances within California. This website The City of New York has prepared a pre-planning and site investigation, designing (www.seismicordinances.com) provides Climate Change Adaptation Task Force that to resist the potential disasters, and designing upgrade requirements and relevant dead- has developed climate predictions for New a structure to be habitable after the disaster. lines. In April 2013, the city of San Francisco York City through 2100. The City has also These credits shift disaster resilience from adopted an ordinance that required the produced a document, Retrofitting Buildings disaster recovery to disaster risk mitigation. mandatory seismic retrofit of wood-frame for Flood Risk (NYC Planning, 2014), and States and cities are developing resilience plans soft-story buildings (buildings with a weaker updated the New York City Building Code to assess their current infrastructure and pri- first floor that are prone to collapse in an to include increased risk of flooding. oritize future planning. In 2014, New York earthquake). As a result of this ordinance, City developed OneNYC, a resilience plan around 4300 buildings were surveyed and Organizations Promoting that addresses flood mitigation along New York City’s 520 miles of coastline. Figure 1 2800 were identified by engineers to have a soft story. All of the affected building owners Resilience shows the Battery Park Underpass in New were notified in September 2013 and required Resilience can be addressed at different scales: York City after Hurricane Sandy. Motivated to have submitted forms demonstrating that on an individual building basis or a comby the extreme effects of Hurricane Sandy in their building was evaluated by a licensed munity basis. The following section describes 2012, this plan also addresses how to mitigate professional engineer by September 2014. organizations and tools addressing building flooding for the 400,000 residents of New York There was a 99% compliance with this step resilience and community resilience. City that live in a 100-year floodplain. The City of Boston has also addressed the effect of of the ordinance. Those building owners that did not comply had their building placarded The Rockefeller Foundation sea level rise. A Climate Change Adaptation with a Notice of Violation. The next phase of 100 Resilient Cities is a program developed by Plan was developed by the city and includes the ordinance, for those buildings affected, is the Rockefeller Foundation. This initiative is flood hazard maps that account for sea level to submit a permit application with plans for challenging cities around the world to make
resilience a priority. 100 Resilient Cities not only considers the progress cities have made to decrease the long-term impacts of external shocks (hurricanes, earthquakes, floods, etc.), but also the day-to-day stresses a city experiences on its social, economic, cultural, and political framework. Cities are required to apply for the distinction by developing a resilience strategy or plan. Those cities chosen to be part of the 100 Resilient Cities receive monetary and logistical support to establish a Resilience Officer for the city. Figure 2 shows the locations of the 100 Resilient City participants in North America. NIST Community Resilience Program NIST addresses natural and man-made disasters having catastrophic impacts on the building stock of a community (NIST, 2015). Today’s communities are constructed with many interdependencies within the built environment. Previous earthquakes have demonstrated that buildings in a community can have an effect on functionality after an earthquake. There is a potential that, if one building is not functional, there is a global impact to the community’s ability to operate after a disaster. NIST has developed a program that allows communities to examine the vulnerabilities in the interdependencies of the built environment.
Figure 2. Map of 100 Resilient Cities Participants in North America.
Resilient Design Institute (RDI) The Resilient Design Institute is a web-based application that hosts case studies, strategies, and principles of resilient design. The website aims to be a resource for individuals, organizations, and communities that would like to incorporate hazard mitigation and resilience into their designs. This website addresses both man-made and natural disasters. RDI also provides consulting services for project teams. FEMA P-58 FEMA P-58: Seismic Performance Assessment of Buildings (FEMA, 2012) is a document based on a 10-year FEMA study which provides a performance prediction based on building-specific analysis. The results from a FEMA P-58 analysis are Losses (in dollars), Fatalities & Injuries, Repair Time & Tagging, and Environmental Impacts. The methodology involves a probabilistic approach using a Monte Carlo simulation. Probabilistic variables including ground motions, structural responses, content damage fragility curves, and loss curves are run through various simulations to provide confidence levels for certain outcomes. The Performance Assessment Calculation Tool (PACT) is the companion software to FEMA P-58. USRC Rating System The United States Resiliency Council is a non-profit organization which implements a rating system for the earthquake performance of buildings. It aims to provide a universal rating system akin to LEED ratings for sustainability. As of now, the rating system is limited to earthquakes, but the goal of the council is to expand the rating systems into additional disasters in the future. The city of Los Angeles has already adopted this rating system to improve the performance of its buildings.
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US Patent 6213679; other patents pending
Arup REDi Arup’s Resilience-Based Earthquake Design Initiative (REDi) is both a framework for designing resilient buildings as well as a rating system which qualifies the level of resilience. This rating system focuses on planning for three different levels of resilience: Building Resilience (structural system), Organizational Resilience (disaster planning), and Ambient Resilience (adjacent buildings and other site hazards). The REDi rating system also requires a loss assessment using PACT. REDi ratings are classified as Platinum, Gold, and Silver. The building must be shown to meet certain performance objectives for Downtime, Direct Financial Loss, and Occupant Safety to meet any of the ratings. SP3 The Seismic Performance Prediction Program (SP3) is an online, cloud-based tool developed by Haselton Baker Risk Group. It serves as an interface to use the FEMA P-58 methodology and can also calculate probable maximum loss (PML), an Arup REDi rating, and a USRC rating. The tool provides a more streamlined way to implement the FEMA P-58 methodology by providing soil and hazard curves and content estimates pre-packaged in the tool. EA Tool The Environment Assessment Tool™ (EA Tool) is a life cycle analysis tool developed by Skidmore, Owings & Merrill LLP to estimate the equivalent carbon emissions of a structure. Calculated embodied carbon quantities consider contributions from materials and construction including material extraction, transportation, construction waste, and equipment operations. Furthermore, the tool provides a link between sustainability and resilience by estimating the embodied carbon associated with repairs related to seismic damage and the potential for full demolition and replacement of a severely damaged structure. Probable seismic damage is based on HAZUS fragility curves and can account for increased performance for enhanced seismic systems. The EA Tool is intended to be used by architects, engineers and building owners to help inform early design decisions and provide a costbenefit analysis of enhanced seismic systems. Resilience Insight Tool BuroHappold’s Resilience Insight Tool is an online tool that evaluates the resilience of an entire city. It provides a framework to assess a city’s capability against different shocks/stresses including natural hazards, epidemics, and attacks. Based on a series of inputs, the tool provides an assessment of the vulnerability and adaptive capacity of a city in terms of the effects on Society & Community, Governance & Economy, and Environment & Infrastructure (BuroHappold, 2016). U.S. Climate Resiliency Toolkit The U.S. Climate Resilience Toolkit (NOAA, 2016) provides multiple scientific tools and information to assist people and entities that would like to manage their climate-related risks and improve their resilience to extreme events. This site is developed for citizens, communities, businesses, city planners, and policy advocates. The site includes many different modules: a five-step process to plan, initiate, and manage a project that is resilient to climate-related events; real-world case studies that have been successfully implemented by communities and businesses; climate data organized in maps, interactive tools, charts, and more; and federally-developed training programs. The U.S. Climate Resilience Toolkit was developed in response to President Barack Obama’s Climate Action Plan and Executive Order to help the nation prepare for climaterelated changes and impacts.
Conclusions
Modern-day cities are approaching disaster mitigation from a holistic perspective that includes the performance of the built environment during a natural or man-made disaster. Cities and regions are assessing their infrastructure for long-term resilience. These assessments and recommendations can have an impact on the extreme loading demands structural engineers use to evaluate buildings, in addition to the priorities of a region. For example, the cities of Boston, New York, and New Orleans have updated coastal flooding hazard maps to incorporate the effects of climate change and sea level rise. The City of New York has updated the New York City Building Code to incorporate these changes. The tools presented in this article aim to help engineers design for long-term resilience in a manner consistent with city, state, and countries resilient plans. The organizations and toolkits discussed within this article each present different approaches to resilience, and allow structural engineers to be a part of the movement. This is by no means a comprehensive list of organizations and tools. It is critical to remember that resilience is not only applicable to seismic hazards. In fact, the LEED sustainability metric has expanded its resilience pilot credits to include floods, hurricanes, and wildfires. The northeastern U.S. is still recovering from Hurricane Sandy. Building owners are considering the future impacts of climate change and natural disasters on their buildings. Most recently, the Whitney Museum of Art building in southern Manhattan was constructed considering flooding due to storm surge. As structural engineers, we have a responsibility to help protect cities from a variety of disasters and aim to continually improve our communities. As natural disasters become more frequent and larger in magnitude, cities observe the capacity of their infrastructure and their ability to recover first-hand. In the U.S., every dollar spent on pre-disaster hazard mitigation results in four dollars in future benefits for a community (ASCE/ SEI Sustainability Committee, 2014). In the past ten years, the damage due to increasing amounts of rainfall and increasing temperature around the world has totaled over US$1.4 trillion (Michell, 2016). Natural disasters and the effects of climate change are causing large economic burdens for cities around the world. Cities within the U.S. are developing resilience strategies for pre-disaster mitigation to take advantage of that statistic, and reduce post-disaster recovery costs and the effects of the disasters in their communities. These resilience strategies will have a direct impact on structural engineers’ work and the direction of the building codes.▪
Erica C. Fischer is a Design Engineer at Degenkolb Engineers in Seattle, Washington. She is an active member of the ASCE/SEI Sustainability Committee serving as the Chair of the Disaster Resilience Working Group and a member of the Steering Committee. Erica can be reached at efischer@degenkolb.com. Megan Stringer is a Senior Engineer in Holmes Structures’ San Francisco office. She is an active member of the sustainable design community and serves as chair of the SEAOC Sustainable Design Committee and is on the steering committee of ASCE SEI’s Sustainability Committee. Megan can be reached at mstringer@holmesstructures.com. Christopher Horiuchi is a Project Engineer with Skidmore, Owings & Merrill LLP in San Francisco, CA. He is a member of the ASCE/SEI Sustainability Committee and its Disaster Resilience Working Group. He can be reached at christopher.horiuchi@som.com.
The online version of this article contains a table and detailed references. Please visit www.STRUCTUREmag.org.
Roger LaBoube Retires from the STRUCTURE Editorial Board
After serving for ve years on the STRUCTURE magazine Editorial Board as the steel industry representative, Roger A. LaBoube, Ph.D., P.E., is retiring. Roger is the Curator’s Distinguished Teaching Professor Emeritus of Civil Engineering and Director of the Wei-Wen Yu Center for ColdFormed Steel Structures at the Missouri University of Science & Technology (formerly University of Missouri-Rolla). Dr. LaBoube has an extensive background in the design and behavior of cold-formed steel structures. His research and design activities include: cold-formed steel beams, panels, trusses, headers, wall studs as well as bolt, weld, and screw connections. Roger is active in several professional organizations and societies. Barry Arnold, P.E., S.E., SECB, Chair of the STRUCTURE magazine Editorial Board, had this to say about Rogers’s Departure: “Roger has served faithfully and diligently on the Editorial Board since February 2011. Even after Roger announced he would step down from the Board in December, he continues to nd content for the magazine and to work with authors on developing articles. Roger’s dedication and commitment to our publication and the profession are commendable, and he will be missed.” Regarding his tenure on the Board, Roger commented, “I have enjoyed the opportunity to serve on the Board and work with highly professional individuals. I look forward to continuing to contribute content to the magazine.” Erin Conaway, P.E., LEED AP, will replace Mr. LaBoube as a Steel Industry representative. Ms. Conaway is a Regional Engineer for SidePlate Systems, Inc. based in Phoenix, AZ and provides support for design and construction professionals utilizing SidePlate connection technology in the Southwestern U.S. She is a graduate of the Oklahoma State University Architectural Engineering (Structures) program in Stillwater, OK. On a national level, Erin also serves as SidePlate’s Industry Specialist, involved with the development and implementation of initiatives focused speci cally on construction clientele. Previously, Erin was the Intermountain West Regional Engineer for the American Institute of Steel Construction (AISC). Barry Arnold said this about Ms. Conaway’s appointment to the Editorial Board: “I am pleased to welcome Erin Conaway to the Editorial Board. She is an experienced author, and editor and has a great passion and enthusiasm for writing and working on the Board. She was highly recommended by her peers, so I have no doubt that she will be a productive addition to the team.” Please join STRUCTURE magazine in congratulating Roger LaBoube on his service and welcoming Erin Conaway to the team.
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Foundation Companies Close 2016 Strong and Optimistic
By Larry Kahaner
Companies involved in foundations are reaping the bene ts of new techniques and methods that allow building on land that was once deemed unbuildable. For instance, at Geopier Foundation Company, Inc. (www.geopier.com), Director of Business Development Matt Caskey points to their GeoConcrete Column (GCC) system which o ers a cost-e ective solution to support heavy applied loads, and control settlement at sites with weak and compressible cohesive and organic soils overlying dense soils or rock. e system provides this reinforcement by matching high modulus elements with the low modulus soil to control settlements. GCCs are installed through a patented displacement process by driving a hollow mandrel to the design depth while simultaneously pumping concrete. e process forms an enlarged concrete base to develop resistance e ciently. GeoConcrete Columns are only rammed at the base. Following the creation of the bottom bulb, the mandrel is extracted while continually pumping concrete under pressure. e GCCs then support engineered footing pads and high-bearing-pressure shallow footings or mat foundations to provide settlement control. GeoConcrete Columns are an e ective replacement for deep foundations including driven piles, drilled shafts or auger cast-in-place piles, or time-consuming surcharging. Caskey says, “ rough continued research and development, Geopier has expanded its system capabilities to ensure high performance and reliability while providing value compared to deep foundation alternatives. Geopier’s design-build engineering support and sitespeci c modulus testing, combined with the experience of providing settlement control for thousands of projects, provide an unmatched level of ground improvement options for virtually any soil type and groundwater condition across many applications. Geopier rigid inclusions are high-sti ness elements constructed of cement treated aggregate, grouted aggregate, or plain concrete and are used to transfer loads through weak soils, such as soft clays and organics, down to a suitable bearing stratum.” He adds: “We are expanding our technologies, and continuing to explore and test new ground improvement techniques that will continue to grow the intermediate foundation market. We also continue to hire new employees ranging from additional regional engineers, engineers to assist in our design center, a director of business development and more o ce help. We also continue to update our marketing e orts. We are becoming much more active regionally, as well as promoting ourselves through social channels such as LinkedIn and YouTube.” At RISA Technologies (www.risa.com), CEO Amber Freund notes that RISAFoundation v9 was recently released and includes masonry retaining wall design. “Structural engineers who used RISAFoundation to design concrete retaining walls in the past wanted the ability to switch between masonry and concrete for their designs. is new feature allows them the exibility of evaluating the best material solution for their project,” Freund says. She says that the company is seeing a growth trend in commercial and residential markets. “Slow and steady seems to be the pattern.” Freund concludes: “Engineers are increasingly turning to software to evaluate di erent material and design choices. is is becoming more of a necessity as projects become so fast paced.” (See ad on page 60.) Last year was an exciting year for Subsurface Constructors (www.subsurfaceconstructors.com), according to Lyle Simonton, Director of Business Development. “Not only did we turn 110 years old, but we were able to stay extremely busy in all three of our major services areas – deep foundations, ground improvement, and earth retention. We continue to see structural engineers seek out more cost-e ective ways to support structures in soft soils, which often results in designing foundations supported by aggregate pier ground improvement. Subsurface Constructors completed over 75 such projects nationwide in 2016, including small retail projects, such as Dollar General Stores, to large educational and medical facilities like the Post-Acute Rehab Hospital in Corpus Christi, Texas.”
Simonton notes that structural engineers seem to be leaning more heavily on specialty geotechnical contractors in project development e orts with respect to preliminary design, budgeting, and speci cation writing. “As one of the GEOPIER GROUND IMPROVEMENT few companies to provide both deep foundation and aggregate pier ground CONTROLS STRUCTURE SETTLEMENT improvement, Subsurface Constructors helps structural engineers determine the most economical approach for foundation support.” “In 2016, Subsurface Constructors saw an increase in ground improvement work in the Northeastern United States as a result of their new o ce in the Boston area,” Simonton adds. “With so much of the development in this region taking place in old urban lls and very soft existing soil, aggregate piers and grouted columns are often the go-to ground improvement solutions for structural support.” (See ad on page 42.) Hayward Baker’s Director of Business Development (www.haywardbaker.com), Je Hill, says that his company is doing more earthquake drains. “It is a more cost-e ective means to mitigate lique able slopes than some of the traditional improvement methods. We also make a push for rigid inclusions. We believe that it is a good improvement technique when soils are too soft to use aggregate piers but the structure doesn’t dictate a traditional GIVE YOUR STRUCTURE STABILITY deep foundation.” Hill says: “ ere’s been a lot more emphasis in the last couple of years on Work with Geopier’s geotechnical engineers to solve your ground real-time monitoring, and using real-time improvement challenges. Submit your project specifications to monitoring parameters for structural receive a customized feasibility assessment and preliminary cost movement, vibration, settlement, poor estimate at geopier.com/feasibilityrequest.water pressure, and things like that. It is all generated on a computer. We can make a three-dimensional map of the 800-371-7470 structure as we’re doing our work. For geopier.com example, we can map an adjacent struc- info@geopier.com ture to monitor and protect it from the work that we’re doing concurrently.” As for trends, Hill sees more competition. “We are seeing some of our techniques become mature and He concludes: “ e segment continues to grow and I think that it’s frankly more commoditized. We’re also starting to see more people because there is a wider acceptance of specialty techniques. We routinely enter the specialty foundation business, and a lot of them are not get calls from structural engineers because an owner is saying ‘you need experienced with the techniques. We’re noticing some construction to consider aggregate piers’ or something of that nature integrity issues that we didn’t see ten or fteen years ago because which, ten years ago, we didn’t see. Business is excellent. It there were just a few people doing this work, and they had a lot of is growing. We’re having a very good year at Hayward Baker experience.” pretty much across the country. (See ad on page 39.) ▪
American Wood Council
Phone: 202-463-2766 Email: info@awc.org Web: www.awc.org Product: National Design Specification® and Special Design Provisions for Wind and Seismic Description: AWC’s National Design Specification (NDS®) for Wood Construction contains design provisions and tabulated anchor bolt design values for wood-toconcrete connections. AWC’s Special Design Provisions for Wind and Seismic contains design provisions for lateral, shear, uplift, and hold-down connectors used to attach wood frame shear walls to concrete.
Concrete Masonry Association of California and Nevada (CMACN)
Phone: 916-722-1700 Email: info@cmacn.org Web: www.cmacn.org Product: 2015 Design of Reinforced Masonry Structures, 8th Edition Description: Useful text in classroom, or as a reference for practicing engineers. Based on 2013 Building Code Requirements for Masonry Structures (TMS 402-13/ACI 530-13/ASCE 5-13) as developed by MSJC and the 2015 IBC. Design load calculations referenced to ASCE 7-10. Available early 2017.
Dlubal Software, Inc.
Phone: 267-702-2815 Email: info-us@dlubal.com Web: www.dlubal.com Product: RFEM Description: Effectively analyze complex connection layouts utilizing surface and solid elements, automatic finite-element meshing, mesh refinements, and surface intersection capabilities. Perform required ultimate and serviceability limit state designs according to ACI-14 and other international standards. Accurately represent soil-structure interaction with multiple soil layers to obtain calculated foundation stresses and settlements.
Heckmann Building Products, Inc.
Phone: 815-274-6395 Email: david@heckmannanchors.com Web: www.heckmannanchors.com Product: Pos-I-Tie® ThermalClip® Description: A masonry anchor accessory designed to reduce thermal conductivity through masonry walls. The UL-94 V-0 rated plastic material not only passes fire testing, but offers unmatched thermal-break technology. No spinning wings which can be hazardous to install on the job site. Just clip on and move on!
Hubbell Power Systems, Inc.
Phone: 855-477-2121 Email: civilconstruction@hubbell.com Web: www.hubbellpowersystems.com/abchance Product: CHANCE Helical Tieback Anchors Description: Backed by over 100 years of engineering experience, CHANCE Helical Anchor Systems offer a technically advanced and extremely cost effective alternative to concrete and other deep foundation systems. CHANCE Helical Piles comply with the 2015, 2012, and 2009 International Building Code (IBC), are ICC-ES Approved and ISO:9001 Certified. Kelken Construction Systems
Phone: 732-416-6730 Email: ken@kelken.com Web: www.kelken.com Product: Keligrout Structural Adhesive Description: A superior high strength polyester resin anchoring material with guaranteed pullout values.
Pile Dynamics Inc.
Phone: 216-831-6131 Email: dfischer@pile.com Web: www.pile.com Product: Thermal Integrity Profiler (TIP) Description: TIP assess the quality of drilled shafts, bored, ACIP, CFA or drilled displacement piles, as well as quality control and shape evaluation of jet grouting, slurry walls and diaphragm walls – evaluating the entire cross-section and length of the foundation revealing necks, inclusions, bulges, variations in concrete cover, shaft shape and cage alignment.
RedBuilt
Phone: 888-859-6757 Email: pdrace@redbuilt.com Web: www.redbuilt.com Product: Open Web Truss Bearing Clips Description: These trusses have tested lateral load capacities to frame seismic details without the use of strap ties. Clips may be welded or nailed to bearings in most project applications where straps are specified, for CMU walls, or wider on-center spacings of 32 inches or more.
S-FRAME Software
Phone: 604-273-7737 Email: info@s-frame.com Web: www.s-frame.com Product: S-CONCRETE Description: Continuous Concrete Beam Design. Design and detail reinforced concrete beams for both strength and serviceability to multiple codes. View interactive results including capacity envelopes on shear, moment and torsion diagrams. Not another black box solution: comprehensive reports incorporate equations employed, clause references and diagrams.
Simpson Strong-Tie
Phone: 800-925-5099 Email: web@strongtie.com Web: www.strongtie.com Product: The Next Great Hollow-Wall Anchor Description: FlipToggle® takes the guesswork out of hollow-wall anchoring. Its unique design securely holds the toggle for insertion into the predrilled hole. Once inserted, the spring tab flips the toggle into the right position so that when the collar is tightened the anchor is ready for the bolt.
Product: Steel Rod Hanger Threaded Rod Anchor System Description: A one-piece fastening system for suspending ¼-inch and ⅜-inch threaded rod. Vertical rod hangers suspend threaded rod in overhead applications from steel joists and beams, while horizontal rod hangers are for applications requiring installation into the side of joists, columns and overhead members. Standards Design Group, Inc.
Phone: 800-366-5585 Email: info@standardsdesign.com Web: www.standardsdesign.com Product: Wind Loads on Structures 5 Description: Allows wind load computations for the ASCE 7-98, 02 or 05, Section 6 and ASCE 7-10, Chapters 26-31. WGD5 performs calculation to design window glass according to ASTM E 1300-09. BRDG 2007 finds its basis in the ASTM F 2248.
Strand7 Pty Ltd
Phone: 252-504-2282 Email: anne@beaufort-Analysis.com Web: www.strand7.com Product: Strand7 Description: An advanced FEA system used worldwide by engineers for a wide range of structural analysis applications. It comprises preprocessing, a complete set of solvers and post processing. It includes a range of material models suitable for the analysis of soil allowing for simulations of the complete soil/structure system.
Trimble
Phone: 770-426-5105 Email: kristine.plemmons@trimble.com Web: www.tekla.com Product: Tedds Description: Automating your everyday structural designs, Tedds’ broad library includes anchor bolt design per ACI 318 Appendix D. The calculation includes comprehensive checks for tensile and shear failure of anchors and is available as part of a free trial on the website.
Product: Tekla Structures Description: Tekla is an Open BIM modeling software that can model all types of anchors required to create a 100% constructible 3D model. Anchors can either be created inside the software or imported directly from vendors that have 3D CAD files of their products.
Wej-it
Phone: 230-857-2200 Email: david@toggler.com Web: www.wejit.com Product: High-Performance Anchors Description: Wej-it has several new products for 2017: Hang-TITE Rod Hanger Anchors; PoundIt Drive Anchors; POWER-Skru Large Diameter Concrete Screws; and Screw-In Drive Screw Anchors.
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