American Society of Civil Engineers

Design Considerations for Composite Beams Using Precast Concrete Slabs

by Stephen Hicks, (Manager, Building Engineering, The Steel Construction Institute, Silwood Park, Ascot, Berkshire, SL5 7QN, U.K. E-mail:, R. Mark Lawson, (SCI Professor of Construction Systems, University of Surrey, Department of Civil Engineering, Guildford, Surrey, GU2 7XH, U.K. E-mail:, and Dennis Lam, (Senior Lecturer, School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, UK E-mail:
Section: Composite Slabs, pp. 190-201, (doi:

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Document type: Conference Proceeding Paper
Part of: Composite Construction in Steel and Concrete V
Abstract: Precast concrete floors are widely used in building construction, but there is little detailed design guidance on their application in steel-framed buildings. Traditionally the steel beams have been designed to support the precast slabs on their top flange. However, there are an increasing number of composite frames and slim floor constructions where the precast slabs are designed to interact structurally with the steel frame. Composite action can be developed by welded shear connectors attached to the steel beams and by transverse reinforcement; however, this form of construction is currently outside the provisions of the current codes of practice. This paper discusses some of the particular issues that affect this form of construction, and presents design guidance using the Eurocode methodology.

ASCE Subject Headings:
Composite beams
Concrete slabs
Precast concrete
United Kingdom