Webinar Archives

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Part of the Sustainable Structures Webinar Series: This one-hour program is intended for professional designers and engineers. The attributes of precast concrete will be presented, demonstrating how these qualities may be applied to the design and construction of safe and efficient storm shelter facilities. The versatility and resiliency of precast concrete will be further highlighted by a video demonstration, and a series of case studies.

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This webinar will provide a general overview of common horizontal forming systems in use today. We will also discuss some project specific factors that drive the system selection process as well as review examples of building design factors affecting constructability and economy.

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Contractors want concrete to be as workable as possible to facilitate placement and consolidation without compromising performance in the hardened state. Concrete producers strive to consistently deliver expected performance attributes. Yet, hydration of Portland cement leads to a change in fresh concrete properties immediately after batching, most notably with respect to mix slump or workability. In air-entrained concrete mixtures, furthermore, modified slump can lead to changes in air content, typically a reduction, and potential rejection of the load. Invariably, rejected loads result in loss of revenue and reduced profits for concrete producers. This presentation will discuss workability retention and the various methods traditionally used to manage it. Additionally, an innovative, new admixture is introduced that provides workability retention without the adverse effects of current practices.

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Gary Klein addresses how the strut-and-tie method is implemented for various types of discontinuity regions such as deep beams, corbels, and post-tensioning anchorage zones. Jeremiah Fasl shares an example of how the method was used for design of the crane support beam at Barbours Cut Terminal at the Port of Houston.

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A lot is known about Type I Construction (non-combustible) because it has been used for decades for multi-story construction.  Although Type IV Construction (heavy timber) is not new, it is just now beginning to be used with greater frequency in multi-story construction. This presentation will provide an overview of the building code as it relates to Type I and Type IV Construction. Case studies will be used to demonstrate relevant code sections that apply to Type I and Type IV buildings using the current Minnesota Building Code including:

    Chapter 5 – Area and Height limitations of Type I and Type IV
    Chapter 6 – Fire Rating requirements for Type I and Type IV
    Chapter 7 – Fire and Smoke requirements, shafts, sound assemblies  
    Chapter 9 – Fire and Life Safety requirements of Type I and Type IV
    Chapter 23 – Wood and heavy timber construction.  

In addition, materials and special inspections will be discussed for each type of building.

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The webinar explores two concepts; First is the preventative measures and the services around firestop consulting, inspections, and what architects, contractors, project managers, and installers should keep in mind as they plan, construct, and maintain firestops in their facilities. Second is what happens when a fire does occur, how does it affect the concrete, and what assessments and testing can be completed onsite to determine repair or replacement options.