5 PART SERIES - Surfside, Florida Building Collapse

This 5 Part Series Recording Package on the Collapse in Surfside Florida include:

• 4 Parts - Surfside, Florida Building Collapse of June 2021 and ACI 318 Building Code Requirements for Structural Concrete:
  This series of four one-hour webinars focuses on the three main areas of improvement in the ACI standard for concrete design and construction and indicates how compliance with the enhanced requirements would have been beneficial to the performance of the building. The 12-story condominium building, where 98 people were killed, was likely designed under the early or mid-1970s Florida Building Code and ACI 318-71 or ACI 318-77. Concrete durability, flat plate punching shear and structural integrity provisions of ACI 318 are critical areas of improvements that engineers, architects, and building officials must be familiar with for safe performance of concrete buildings.



• Initial Investigation into the Partial Collapse of the Champlain Towers South (CTS) Building in Surfside Florida:
  On June 24, 2021, the Champlain Towers South building in Surfside Florida collapsed without warning. The initial collapse occurred outside of the building tower, in the pool deck region. Seven minutes later, the central portion of the building collapsed; the eastern portion of the building collapsed quickly after that. The western section of the building remained standing. Professor Lehman worked with an investigative journalist team at the Miami Herald led by Sarah Blaskey to investigate the partial collapse using tools and technologies she had developed through her research on seismic evaluation of existing buildings and design of new concrete connections. The primary objective of the investigation is to understand how initial damage in a pool deck could lead to partial collapse of this flat-plate cast-in-place reinforced concrete structure with an eye towards improving evaluation methods for these structures. This talk will address the building collapse using: (1) timeline of the collapse as reported by witnesses, (2) building damage photographs and videos, (3) building plans and repair drawings and permits, and (4) advanced nonlinear finite element analyses of the Level 1 slab to investigate possible initiation points and progression of damage.