Diagnosing Nuisance GFCI Tripping From Sewage-Pump Ground-Leakage Current

New BUILDERA Case Study CS-2020-1

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CS-2020-1 is a comprehensive new BUILDERA case study that examines nuisance (ghost) tripping of a ground-fault circuit-interrupter connected to a basement sewage pump.

  • Learn about typical wastewater pump-installation configurations and possible causes for excessive ground-leakage current.

  • Identify and remedy potential shock hazards that pose occupant safety risks.

  • Apply basic measurement principles using AC clamp meters to aggressively tackle tripping GFCIs.

Contractors, building inspectors, property managers and homeowners alike will benefit from the essential analysis in this case study.

New BUILDERA Service Note SN-2018-1 Epoxy Resin Crystallization

How to Restore Crystallized Epoxy Resin Due to Transportation or Cold Exposure

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Two-part epoxies—such as those used to install structural crack monitors—are subject to reversible crystallization when exposed to cold temperatures or temperature cycling during transit or storage. Crystallized epoxy resin may become partly-to-fully solid, making it difficult to dispense with reasonable plunger pressure.

This Buildera service note includes a simple heating procedure for end-users to effectively reverse crystallization, restoring the epoxy to original factory conditions. Instructions are laboratory tested for 30 ml two-part Buildera STRUPOXY (Aboweld 8101-5), however a similar heating procedure may be used with any epoxy subject to crystallization during storage or cold exposure.

Buildera First to Kickstart $250,000 Zizmos® Campaign for Crowdsourced Seismic Sensor

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As the founder and CEO of BUILDERA, and in my board-advisory role for Zizmos Inc., I’m thrilled to announce a stretch goal to raise $250,000 on Kickstarter for an in-home seismic sensor that forms part of a crowdsourced Earthquake Early-Warning Network. Zizmos—a Silicon Valley startup—was founded by Gazi Yildirim, a post-doc researcher from the department of geophysics at Stanford University. To date, Zizmos has received grants from the National Science Foundation and $1,000,000 from Verizon to help fund development of initial prototypes.

In order to realize a viable network, we need enough third-generation sensors deployed in active seismic regions to detect and minimize false alarms. The sensors will also provide property owners with site-specific shake data after significant quakes. Meanwhile, the public may download and experiment with the free Zizmos® eQuake® Mobile App for Android and iOS from Google Play or the iTunes App Store. Please help spread the word and I welcome you, your families, your employers, and your colleagues to participate in this exciting Kickstarter campaign. Only if we hit our $250,000 fundraising target can we begin to realize the Zizmos vision of a cost-effective earthquake early warning system. 

To learn more, watch the videos on Kickstarter 


FOR IMMEDIATE RELEASE

Zizmos® Launches $250,000 Kickstarter Campaign for Low-Cost Earthquake Early-Warning System and Companion eQuake® App

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PALO ALTO, CA, November 7, 2017 — Zizmos Inc., a Silicon Valley technology startup, today launched a $250,000 Kickstarter campaign for an earthquake early-warning system designed to reduce casualties in the next major earthquake. Residents and businesses concerned about earthquake preparedness in seismic zones will appreciate the importance of this new system. Zizmos sensor technology provides crucial seconds of advance warning to protect occupants from oncoming earthquakes. Zizmos invites the global community to learn more about this new technology and to support the exciting Kickstarter campaign.

Link to Kickstarter Campaign

Depending on the proximity to the epicenter, a typical advance warning of 10 to 15 seconds or more is possible. This is sufficient time for occupants to drop under a desk, hold on to a railing, and take cover from falling objects. An early-warning system may reduce the number of injuries from a major earthquake by fifty percent. With an early-warning alert, a manufacturer may shut down sensitive processes to brace for impact, mitigating the damage that shaking causes.  

Building on a $1,000,000 grand prize from Verizon’s Power Answer competition and the engineering research from the founder’s work on Stanford’s pioneering Quake-Catcher Network, Zizmos has built a cloud-connected system that makes earthquake early warning an economic reality. The network is built using two types of sensors: permanent wall-mounted Wi-Fi sensors for homes/offices, and smartphone-based sensors using the eQuake® Mobile App (Google Play & Apple App Store).

“We don’t rely on any one or two readings to issue an alert; rather, we look for a correlated signal from multiple sensors in our network,” says Gazi Yildirim, Zizmos Founder & CEO. “Crowdsourcing the sensors helps to minimize false alarms, but also means we need people in seismic zones to host a sensor in their homes and businesses.”

Zizmos issues alerts through the eQuake Mobile App and to low-cost wall-mounted sensors, helping to ensure personal safety during the next large quake. Zizmos estimates the number of seconds before shaking hits the user’s location. As of today, the eQuake App has over 140,000 downloads and was nominated for Apple Music’s new series Planet of the Apps.  

Zizmos has tested the sensor at the University of Nevada-Reno world-class earthquake lab. With help from Calpine Corporation, Zizmos piloted a test network at the Geysers of Northern California. Frequent quakes have been detected over the past six months with excellent correlation to USGS data.

The Zizmos mission is to build a crowd-sourced earthquake early-warning system in California and global regions facing seismic risk. To achieve this, Zizmos and the greater community depend on your pledge today, starting at just $159 for a single sensor, and $25 toward the eQuake App.

For more information, visit the Kickstarter link below, Zizmos and eQuake are registered trademarks of Zizmos Inc.

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Buildera Releases New App Note AN-16005 Structural Crack Monitoring

Read the new online Buildera Application Note AN-16005 Structural Crack Monitoring, authored by civil engineers Matteo Pietrobelli and Andrea Timpani of Progetto PSC, Italy. Matteo and Andrea have extensive structural-inspection experience, including training fellow engineers and technicians on non-destructive testing methods (NDT). This App Note explores:

  • Why structural monitoring matters
  • Causes of structural cracks
  • Static vs. dynamic crack progressions
  • Tools of the trade to inspect and monitor cracks over time, including handheld inspection microscopes and building-foundation crack monitors

Preparing for the Big One

Insufficient shear walls caused catastrophic structural damage to this soft-story San Francisco residential complex during the 1989 Loma Prieta quake. Photo credit: USGS/J.K. Nakata.

Insufficient shear walls caused catastrophic structural damage to this soft-story San Francisco residential complex during the 1989 Loma Prieta quake. Photo credit: USGS/J.K. Nakata.

Hot off the press! Buildera founder and CEO Greg Lowitz discusses historical and future threats from earthquakes in this new Huffington Post article. Learn how emerging early-warning technology from Zizmos and Buildera crack monitoring can help save lives.

Onset HOBO® MX1101 Bluetooth® Temperature and Humidity Logger Enables Mold-Risk Prediction and Prevention

Download the new Buildera Application Note AN-15004 and discover how a HOBO® MX1101 Bluetooth logger helped to predict and prevent mold in a water-damaged structure. After a roof leak permeated a fifth-floor residence in a new apartment complex, a wireless data logger tracked ambient moisture over a two-month period. This application note explores the merits of relative humidity and humidity ratio as key predictors of mold risk and how continuous monitoring helped the tenants and property owner avert a serious mold problem.


Case Study: ZDX Industries Taps Buildera CRACKMON® for Medical-Tower Seismic Retrofit

This new case study discusses how ZDX Industries—a Santa Monica, California engineering firm—deployed Buildera CRACKMON® crack monitors as part of a multi-year seismic retrofit on the Roxsan medical tower in Beverly Hills. Multiple crack monitors tracked key beams to prioritize repairs. Epoxy injection and Carbon-fiber reinforced polymer beams provide supplemental strength to improve seismic resistance to this building in the earthquake-prone Los Angeles basin.

Cold-Shower Mystery Solved—Buildera Application Note AN-14001

In this new 8-page technical Application Note AN-14001, learn how Buildera deployed multi-channel temperature loggers to solve a puzzling cold-shower complaint, saving the homeowner $1,200 in unnecessary repairs. Discover why gas water-heater thermostats are poor controllers of water temperature and how to strike the right balance between energy efficiency, ample hot water, scald prevention, and bacteria growth. AN-14001 outlines best practices and helpful tips for analyzing domestic hot-water complaints.

New Case Study: TAMCO Thailand Deploys Buildera CRACKMON® at Shell Company Thailand

TAMCO General Manager, Dr. Tusanee Tondee, Ph.D., reveals how her structural consulting firm deployed Buildera CRACKMON® 2D Crack Monitors to assess structural settlement and shear cracks of a Shell Company Thailand building. Read the case study now for best practices in crack monitoring.

Foundation cracks at a Shell Company Thailand facility

Foundation cracks at a Shell Company Thailand facility

TAMCO deploys multiple Buildera CRACKMON® 2D Crack Monitors to track foundation settlement over six months

TAMCO deploys multiple Buildera CRACKMON® 2D Crack Monitors to track foundation settlement over six months

Buildera Publishes New White Paper on Seismic Crack Monitoring

EARTHQUAKE! How Crack Monitors Save Lives and Structures in Seismic Zones

Crack monitor detects changes in crack displacement of plaster wall. Photo © Paul Sullivan.

Crack monitor detects changes in crack displacement of plaster wall. Photo © Paul Sullivan.

In this comprehensive two-part white paper, Buildera founder, Greg Lowitz, discusses seismic risks and essential tips for deploying crack monitors to improve building and occupant safety. Starting with a global perspective and subsequent emphasis on North America, Part I examines recent damaging earthquakes and associated risks to people and structures. Part II follows with extensive discussion of crack monitoring techniques and the economic basis for proactive monitoring prior to and after earthquakes. If you own or manage property in a seismic hazard zone, this white paper is essential reading.

Trend chart tracks changes in crack-width over time, aiding structural forensics. Chart data is for illustration only. ©2014 Buildera.

Trend chart tracks changes in crack-width over time, aiding structural forensics. Chart data is for illustration only. ©2014 Buildera.

Got Cracks?™ Promote Your Company—and Your Career!

Buildera CrackMON® crack monitors add critical structural insight to a cracking crawl space. Photo ©2014 Nolan Pray. Reprinted with permission.

Buildera CrackMON® crack monitors add critical structural insight to a cracking crawl space. Photo ©2014 Nolan Pray. Reprinted with permission.

Calling all Architects, Contractors, Engineers and Inspectors!

Do you specify or use concrete crack monitoring technology? Do you engage in structural forensics, civil or geotechnical engineering? Are you an architect, inspector, or contractor? Do you repair and restore historic properties?

Share your knowledge and experience with thousands of colleagues and drive potential customers to your business. This free Buildera service promotes your company—and your expertise, adding credibility that propels your business and your career. Become a Buildera technical contributor today and help to expand the growing list of customer case studies profiling unique applications of CrackMON® crack monitoring technology.

To participate in this exciting program, please fill out a preliminary Got Cracks™ Questionnare. We'll review your creative ideas and get back to you shortly with details and next steps.

See these examples of recent case studies:

Residential Foundation Settlement Cracks - Nolan Pray, Engineer

North Carolina I-295 Culvert Cracks - Michael Harper, Inspector

Ready to contribute? Pitch your idea now. We can't wait to hear your story!