AC1 34OR-97 AC1 DESIGN HANDBOOK ? international Copyright American Concrete Institute Provided by IHS under license with ACI No reproduction or networking permitted without license from IHS PUBLICATION SP-17(97) Licensee=Bechtel Corp/9999056100 Not for Resale, 05/04/2005 04:29:24 MDT `,``,,,,``,,`,,`,,`,,````,`-`-`,,`,,`,`,,` - Design of Structural Reinforced Concrete Elements in Accordance with the Strength Design Method of AC1 318-95 THIS DOCUMENT I S PROTECTED BY THE LAWS OF COPYRIGHT If additional copies are needed, in whole or in part, contact the Member Services Department of the American Concrete Institute: P.O Box 9094 Farmington Hills, Michigan 48333-9094 TEL: 248-848-3800 FAX: 248-848-3801 SIXTH EDITION Copyright 1997 American Concrete Institute P.O Box 9094 Farmington Hilis, MI 48333-9094 Third Printing, July 2001 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 electronic or mechanical device, printed or written or oral, or recording for sound or visual reproduction or for use in any knowledge or retrieval system or device, unless permission in writing is obtained from the copyright proprietors Printed in the United States of America `,``,,,,``,,`,,`,,`,,````,`-`-`,,`,,`,`,,` - The Institute is not responsible for the statements or opinions expressed in its publicaîiwis Institute publications are not able to, nor intended to, supplant individualtraining, responsibilityor judgement of the user, or the supplier, of the information presented international ISBN 0-087031-045-3 Copyright American Concrete Institute Provided by IHS under license with ACI No reproduction or networking permitted without license from IHS Licensee=Bechtel Corp/9999056100 Not for Resale, 05/04/2005 04:29:24 MDT AC1 340R-97 AC1 Design Handbook Design of Structural Reinforced Concrete Elements in Accordance with the Strength Design Method of AC1 318-95 Reported by AC1 Committee 340 Mohsen A Issa Chairman Husam A Omar, Secretary Richard Furlong' Moussa A Issa James S Lai Douglas O Lee S Ali Mirra Edward G Nawy William E Rushing, Jr Charles G Salmon Murat Saatcioglu Sudhakar P Vema `,``,,,,``,,`,,`,,`,,````,`-`-`,,`,,`,`,,` - Param D Bhat William W Bintzer Patrick J Creegan Om P Dixit Noel J Everard 'Consulting Member The AC1 Design Handbook is intendedfor use by individuals having a general familiarity with the strength design method and with "Building Code Requirements for ReinforcedConcrete (AC1 31&95)." This publication provides information for the engineering design and analysis of beams, one-way slabs, brackets, footings, pile caps, columns two-way slabs, and seismic design Informationis presented on three sections: Design Aids Design Examples, and Commentary on Design Aids The Design Examples illustrate the use of the Design Aids, which are tables and graphs intended to eliminate routine and repetitiouscalculations The Commentary explains the analytical basis for the Design Aids Keywords: anchorage (stnidural); axial loads; bars; beams (supports); bending; bending moments; biaxial loads; brackets; buckling; columns (supports); concrete construction; concrete piles; concrete slabs; connections: cracking (fracturing); deflection; flanges; flexural strength; footings; frames; load factors; loads (forces); long columns; moments of inertia; pile caps; reinforced concrete; reinforcing steels; shear strength; clendemess ratio; spiral columns; splicing; stiffness; strength analysis; structural analysis; structural design; T-beams; tension; torsion AC1 Committee Repons Guides Standard Practices, and Commentariesare intended for guidance in planning, designing executing and inspecting consmiction This document is intended for the use of individuals who are competent to evaluate the significanceand limitations of i n content and recommendationsand who will accept responsibility for the application of the material it contains The Amaican Concrete Instimte disclaims any and all responsibility for the stated piinciples The InStiNte shall not be liable for any loss or damage arising therefrom Reference to this document shall not be made in conuact documents If items found in this document axe desired by the ArchitectlEngineer to be a part of the c o n m t documents they shall be restated in mandatory language for incorporation by the Architecfigineer I I internationaì- Copyright American Concrete Institute Provided by IHS under license with ACI No reproduction or networking permitted without license from IHS AMERICAN CONCRETE INSTITUTE P.O.Box 9094 Fannington Hills MI 48331-9094 Phone: 2481848-3700 Fax: 2481848-3701 Licensee=Bechtel Corp/9999056100 Not for Resale, 05/04/2005 04:29:24 MDT TABLE OF CONTENTS AC1 18-95 Strength Reduction Factors Xiv FOREWORD xv NOTATION xvii DESIGN AIDS FLEXURE 1Reinforcement ratios and a,,for quick approximatedesign of rectangular beams with no compression reinforcement FLEXURE 2-Nominal strength coefficients for design of rectangular beams with tension reinforcement only FLEXURE ' 3000 psi FLEXURE 2.2-f,' 4000 psi FLEXURE ' 5000 psi - FLEXURE - 4 ' 6000 psi -9 FLEXURE 3-Nominal strength coefficients for rectangular beams with compression reinforcement in whichf, ' =fy and for flanged sectionswith hl< a 10 FLEXURE ' 3000 psi & 4000 psi -11 FLEXURE 5000 psi & 6000 psi FLEXURE 3.3-Coefficient I& for use in computingA, for flange Section with &[...]... shear and equilibrium torsion -334 16 -Design for shear and equilibrium torsion 336 -338 17- Design for shear and compatibility torsion 1& -Design for shear and compatibility torsion 340 Footing Design Examples 1 -Design of a continuous (wall) footing 2 -Design of a square spread footing %Design of a rectangular spread footing +Design of a pile cap 344 -346 -349... of compressive member center to center spacing of bars, in center to center spacing of web reinforcement, in (Shear) maximum spacing of transverse reinforcement within Pd center to center, in required stirrup distance, ft (Shear) center to center spacing of reinforcement in either direction "1" or "2",in (Shear) reinforcement spacing measured in direction of span for which moments and crack control... bottom of each Design Aid indicates which Design Example illustrates the use of the table or graph Design Examples illustrate the use of the Design Aids (but are not intendeil to show how to design a structure) Commentary on Design Aids gives the basis for the Design Aids Forjudiciousapplication and optimum efficiency, users of this handbook should first acquaint themselves with the Commentary Design Examples... however, the objective of the handbook to teach the novice how to design in reinforced concrete Readers are expected to be competent in design before attempting to use this handbook AC1 COMMIITEE 340 AND ITS WORK HANDBOOK USER’S COMMENTS AC1 Committee 340, Design Aids for Building Codes, was organized in 1958 for the purpose of preparing a handbook that would simpliQ the design of reinforced concrete... (circular) -324 1 &Design of T-section for torsion -325 11 -Design of spandrel beam for torsion 326 12 -Design of T-section for torsion and flexural shear reinforcement 327 1 %Design of bracket in which provision is made to prevent development of horizontal 330 tensile force (N, = O) 14 -Design of bracket in which there is a horizontal tensile force N , -332 1 %Design for shear and... to Direct Design Method 396 2-Reinforcement spacing for crack control in panel of uniformly loaded two-way slab for severe environment 417 Seismic Design Examples 1-Adequacy of beam flexural design for seismic requirements -420 2 -Design of transverse reinforcement for potential hinge regions of i111 earhquake resistant beam 421 -423 3 -Design of an earthquake resistant column &Shear... Design Aids for Strength of Members in Flexure 430 Commentary on Resorcement Design Aids 438 Commentary on Design Aids for Shear Strength of Beams and Slabs -453 -458 Commentary on Design Aids for Columns Commentary on Design Aids for Deflection Control -470 -476 Commentary on Slab Design Aids Commentary on Two-way Action Reinforcement -479 -481 Commentary on Seismic Design. .. moments and crack control are being analyzed, in (Two-way slabs) reinforcement spacing measured perpendicular to spanwise direction of span for which moments and crack control are being analyzed, in (Two-way slabs) clear spacing between bars or bundles of bars, in (Reinforcement) elastic section modulus of section, in' pitch of spiral, center to center of bar (Columns) thickness of tension area for crack... effective slab depth for column (or capital) aspect ratios greater than 2.0 262 Reinforcement Design Examples 1-For rectangular beam subject to benping, selection of reinforcement saliseing bar spacing and cover requirements and crack control provisions (using REINFORCEMENT 8.1,8.2, or 11) 296 2-For a one-way slab, verification íhat reinforcement satisfies spacing and cover requirements and crack... conform to AC1 3 18-83, including new flow charts for design of members in flexure Design of Two-way Slabs was published as a supplement to Volume 1 in 1985 The fifth edition of Volume 1 was formatted in the same manner as the fourth edition Design of Two-way Slabs (Supplement to Volume I) was made a separate volume, Volume 3 of the AC1 Design Handbook This edition is developed in accordance with AC1 ... 1& -Design for shear and compatibility torsion 340 Footing Design Examples 1 -Design of a continuous (wall) footing 2 -Design of a square spread footing %Design of a rectangular spread... `,``,,,,``,,`,,`,,`,,````,`-`-`,,`,,`,`,,` - COLUMNS 7.7.6L3-60.9 173 174 COLUMNS 7.8.1L4-60.6 -175 COLUMNS 7.8.2-L4-60.7 176 COLUMNS 7.8.3-L4-60.8 COLUMNS 7.8.6L4-60.9 177 178 COLUMNS 7.9.1-L5-60.6 ... cross section of compressive member center to center spacing of bars, in center to center spacing of web reinforcement, in (Shear) maximum spacing of transverse reinforcement within Pd center to