• The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: The Un-Shored Composite Slab on Metal Deck Part I, Construction and Behavior

Author(s): Eldon Tipping and Bryan M. Birdwell

Publication: Symposium Paper

Volume: 338


Appears on pages(s): 57-64

Keywords: composite, deflection, gauging, level, metal deck

Date: 3/1/2020

This is the first of a three-part series, the goal of which is to provide the designer and contractor with tools necessary to produce deflected slabs on metal deck that are essentially level. This first part provides a general description of the components of a composite slab on metal deck including the behavior of each of the components prior to concrete placement and after the concrete hardens. Elements impacting the ability of the design/construction team to produce level deflected floors are presented and discussed. Fabrication tolerances for structural steel are published by the American Institute of Steel Construction (AISC) and impact the relative elevation of erected beam/column connections prior to concrete placement. Deflection of the erected floor frame under the weight of fresh concrete is impacted by choices made by the designer regarding the use of Allowable Strength Design (ASD) and Load and Resistance Factor Design (LRFD). Uncertain net deflections of the supporting structural steel frame provide challenges for the contractor in his efforts to provide sufficient concrete in the appropriate locations during initial strike-off to off-set the structural steel deflection. Implications of gauging up off the supporting structural steel versus using a rod and level for initial concrete strike-off are presented and discussed. The importance of construction joint location is addressed, and recommendations are presented.


Please enter this 5 digit unlock code on the web page.