Constructability analysis of the structural systems is a key step in optimizing time, quality, and economic considerations of a project. Shotcrete construction practices and techniques are used to an advantage on multi story projects. This session looks to case studies, best practices, and material sciences for strategies to best achieve a building structure that meets the demanding requirements of the industry.
(1) Recognize structural framing systems and approaches to assessing the constructability advantages of these different systems;
(2) Discuss how shotcrete means, and methods provide a flexible alternate to traditional construction techniques. Case studies will present several of the shotcrete advantages in addressing challenging situations;
(3) Review a case study of an Up/Down Construction method of a multi-story structure which illustrates its constructability advantages of utilizing this method;
(4) Explain the subjectivity of constructability reviews which depend on the individual’s perception. The subjectivity of this service has different meanings to the Owner, Architect/Engineer and the Contractor causing confusion with the use of the term.
This session has been AIA/ICC approved for 2 CEU/PDH credits.
Structural Systems and Constructability
Presented By: Larry Karlson
Affiliation: PCL Constructors Inc.
Description: Various concrete building structural systems are described, including some of the project benefits and constructability challenges.
Constructability of Mass Shotcrete
Presented By: Mitchell Matias
Description: This presentation will discuss the research and development towards a proposed solution to overcome constructability limitations of mass concrete structural walls for the Eglinton LRT project, in Toronto, Canada. Some of the stations are being constructed top-down, limiting the access of moving forms and in a method that will adhere to the schedule, so shooting the concrete was suggested. With very tight maximum temperature restrictions (50C) and a maximum thickness of 1.3 m, a high-volume slag replacement shotcrete mix had to be developed and tested.
Constructability of Zero Lot Lines Foundations with Shotcrete
Presented By: Frank Townsend
Affiliation: Superior Gunite
Description: Zero-lot-line building foundations have been widely used for supporting new structures in close proximity to existing buildings in congested metropolitan areas. This presentation from the American Shotcrete Association will cover design and construction aspects of these walls and highlight how shotcrete placement provides superior strength, flexibility, efficiency, and durability.
Constructability of Top – Down Construction Methods
Presented By: Eamonn Connolly
Affiliation: James McHugh Construction Co.
Description: The rapid project completion of the huge new McDonald’s Global Headquarters in Chicago required innovation and collaboration with all team partners. This 9-story, 770,000 sf office structure was constructed using a “top-down” construction method to accelerate the project schedule and completed construction in just 18 months. This presentation will give a project overview of the numerous engineering design and construction challenges and solutions including deep foundations, secant pile ERS, top down construction, reinforced concrete flat slab, fast cycle construction, construction engineering & logistics.
Architectural Shotcrete – Creative, Sustainable and Durable Concrete Structures Using Shotcrete
Presented By: Charles Hanskat
Affiliation: American Shotcrete Association
Description: Shotcrete placement allows flexibility and creativity in a variety of architectural and structural concrete applications. Shotcrete inherently has all the durability of concrete, and allows efficient, more sustainable construction of curved or complex shapes that are difficult and costly to produce with traditional concrete forming and casting methods. The presentation will provide a basic overview of the shotcrete process, including several case studies and more detailed considerations for shotcrete placement of architectural and structural applications.
Constructability Reviews are Subjective Depending on Your Perception
Presented By: James Cornell
Affiliation: JN Cornell Associates, LLC
Description: The expectations of a constructability review are subjective depending on your perception. The expectations of an owner/developer are quite different from the licensed design professional or contractor. An early partnering session with the whole team needs to define scope of the constructability reviews.