What’s Your Exposure? Exposed Concrete Design and Troubleshooting

Date: October 18, 2017 5:30pm
Location: SGH New York

Wednesday, October 18, 2017

5:30 - 6:00PM Registration & Refreshments
6:00 - 7:00PM Presentation & Discussion
7:00 - 7:30PM Cocktail Reception

Simpson Gumpertz & Heger
550 Seventh Avenue, 10th Floor 
New York, NY 10018

Participants will earn 1.0 AIA CES Learning Unit (LU/HSW) for their attendance.
Attendance is free and open to all; please invite colleagues. We will serve refreshments and hors d'oeuvres. Space is limited to the first 60 guests to register.


Concrete is a workhorse building material used in nearly limitless applications. From structural slabs and columns to exterior cladding and parking garages, and everything in between, concrete has been a reliable building material for generations. However, when concrete is left exposed to the elements, its performance, durability, and watertightness require careful consideration to prevent underperformance. This seminar will present recommendations for designing exposed concrete considering performance and durability, and will highlight common performance issues for exposed concrete used in building applications.

After attending this seminar, participants will be able to:

  • Understand the basics of concrete materials
  • Recognize risks associated with the use of exposed concrete
  • Understand design basics for exposed concrete
  • Identify common performance issues


Sean M. O’Brien, P.E., LEED AP, Senior Principal
Sean O’Brien is a senior principal and head of the Building Technology group in Simpson Gumpertz & Heger’s New York City office. He specializes in building science and building envelope performance issues. Sean has investigated and designed repairs for a wide variety of building types and has published papers on topics including moisture migration in masonry wall systems and condensation resistance of windows and curtain walls. He holds bachelor’s and master’s degrees in mechanical engineering from Cornell University and is a licensed professional engineer in sixteen states.
Nathaniel B. Smith, P.E., Associate Principal
Nathaniel Smith has fifteen years of engineering experience, including structural design, building damage and collapse investigation, repair and rehabilitation projects, and foundation installation monitoring. His background in geotechnical engineering and understanding of soil and foundation types helps him perform structural evaluations of existing buildings and investigations of structural damage and collapse. He also draws from his experience as a full-time field engineer in his design and investigation projects. Nate has worked on structural design and rehabilitation projects throughout New York and New Jersey, and has also given numerous presentations on the effects of adjacent construction on existing structures.
  • Owners
  • Facilities Managers
  • Property Managers
  • Contractors
  • Architects
  • Attorneys
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