April 2020 Monthly Chapter Meeting

April 09, 2020
11:30 AM - 12:30 PM
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ACI Webinar
Webinar
Anywhere, TX
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We will be conducting this meeting via webinar.  Please use the following link for webinar registration: https://attendee.gotowebinar.com/register/1011746816226380044

 

Abstract - First Responders for the Built Environment

The presentation, through case studies, talks about emergency response services for structural issues encountered during construction of new design projects.

Among other examples is an 11-story precast parking structure. The contractor observed significant diagonal faulted cracking of L-beams (supporting double-tee sections) near bearing locations a few days after pouring topping slab. In addition, inverted-tee girders were observed to be supported on cracked corbels at other locations. A quick turnaround was required to mitigate any immediate life safety hazard posed by the structural distresses and buy time for thorough investigation, non-destructive testing, analyses, and repair design.

Another example is a 7-story precast parking structure. The structure was under construction and reportedly erected out of plumb. Poor concrete placing practices and poor weld detailing led to widespread cracking in multiple structural elements throughout the structure. A thorough condition appraisal of the entire structure, qualitative repair design, and construction monitoring program were employed to tackle the observed distresses.

Bio

 

Charles Hammond is a Senior Restoration Consultant in Walker Consultant’s Austin office. Charles’ diverse international and domestic background has included restoration projects, new design projects, forensic investigations, and litigation work. Services provided on these projects include structural analysis, construction administration, repair design, load testing, non-destructive testing, failure investigation peer review, and expert witness services among others. Charles’ over 13 years of design and forensic experience have included various structure types such as stadiums, medical facilities, high-rise buildings, residential buildings, buildings. The structures have utilized a variety of materials included structural steel, wood, concrete. Charles also holds multiple certifications, including being a licensed PE in twelve states, LEED Accreditation, and a Certified Welding Inspector.