ACI 360R-92 (Reapproved 1997) Design of Slabs on Grade Reported by ACI Committee 360 Boyd C. Ringo* Chairman Robert B. Anderson* Larry Gillengerton Robert I. Gulyas Robert D. Johnson Jack I. Mann * Designates members of editorial group Indicates past chairmen of committee Deceased This document presents information on the design of slabs on grade, pri- marily industrial floors and the slabs adjacent to them. The report ad- dresses the planning, design, and detailing of the slabs. Background infor- mation on design theories is followed by discussion of the soil support system, loadings, and types of slabs. Design methods are given for plain concrete, reinforced concrete, shrinkage-compensating concrete, and post- tensioned concrete slabs, followed by information on shrinkage and curling problems. Design examples appear in an appendix. Keywords: Concrete; curling; design; floors on ground; grade floors; in- dustrial floors; joints; load types; post-tensioned concrete; reinforcement (steel); shrinkage; shrinkage-compensating concrete; slabs; slabs on grade; soil mechanics; shrinkage; warping. CONTENTS Chapter l-Introduction, pg. 360R-2 l.l-Purpose and scope 1.2-Work of Committee 360 and other relevant committees 1.3-Work of non-ACI organizations 1.4-Design theories for slabs on grade 1.5-Overview of subsequent chapters Chapter 2-Slab types and design methods, pg. 360R-4 2.1-Introduction 2.2-Slab types ACI Committee Reports, Guides, Standard Practices, and Commentaries are intended for guidance in de- signing, planning, executing, or inspecting construction, and in preparing specifications. Reference to these doc- uments shall not be made in the Project Documents. If items found in these documents are desired to be a part of the Project Documents, they should be phrased in mandatory language and incorporated into the Project Documents. H. Platt Thompson* Vice Chairman F. Ray Rose A. Fattah Shaikh R. Gregory Taylor William V. Wagner Robert F. Ytterberg 2.3-Design and construction variables 2.4-Design methods 2.5-Fiber-reinforced concrete (FRC) 2.6-Conclusion Chapter 3-Soil support systems for slabs on grade, pg. 360R-8 3.1-Introduction 3.2-Soil classification and testing 3.3-Modulus of subgrade reaction 3.4-Design of the slab support system 3.5-Site preparation 3.6-Inspection and site testing of soil support 3.7-Special problems with slab on grade support Chapter 4-Loads, pg. 360R-15 4.1-Introduction 4.2-Vehicle loads 4.3-Concentrated loads 4.4-Uniform loads 4.5-Line and strip loads 4.6-Unusual loads 4.7-Construction loads 4.8-Environmental factors 4.9-Factors of safety 4.10-Summary Chapter 5-Design of plain concrete slabs, pg. 360R-19 5.1-Introduction Copyright 1992, American Concrete Institute. All rights reserved including rights of reproduction and use in any form or by any means, including the making of copies by any photo process, or by any elec- tronic or mechanical device, printed, written, or oral, or recording for sound or visual reproduction for use in any knowledge or retrieval system or device, unless permission in writing is obtained from the copyright proprietors. 360R-1
Design of Slabs on Grade
May 20, 2023
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