Low-and Medium-Rise SteelBuildings
Low- and Medium-Rise Steel Buildings
DesignGuideforLow-andMedium-RiseSteelBuildingsHoratio Allison PEConsultingEngineerDagsboro Delaware
Copyright @ 1991
by
American Institute of Steel Construction Inc.
All rights reserved. This book or any part thereof must not be reproduced in any form without thewritten permission of the publisher.
o ym eouepoe u pedeud uq sey uoqnd su u peuasaud uogeou euto be accurate this information should not be used or relied upon for any specific appli-The publication of the material contained herein is not intended as a representation or warranty on the part of the American Institute of Steel Construction or of any otheror of freedom from infringement of any patent or patents. Anyone making use of this information assumes all liabiity arising from such use.
Caution must be exercised when relying upon other specifications and codes developedby other bodies and incorporated by reference herein since such material may be mod-ified or amended from time to time subsequent to the printing of this ediion. The Institute bears no responsibility for such material other than to refer to it and incorporateit by reference at the time of the initial publication of this edition.
Printed in the United States of America
Second Printing: October 2003
TABLEOFCONTENTS
BASIC DESIGN RULES FOR ECONOMY
LIVE LOADAND BAY SIZE SELECTION 1.
Live Load Selection 2Bay Size Selection... 2
COMPOSITE FLOORS
Allowable Stress (ASD) and LoadEconomy with LRFD Resistance Factor Design (LRFD) 5Floor Load Capacity Enhancement. 6 6Shored vs. Unshored Construction... Serviceability Considerations . . 7 8Underfloor Duct Systems .. 8
OPEN WEB JOIST FLOOR SYSTEMS 10
Joist Size and Spacing10
Composite Joist S y ste m s .. Girder Beam Design 01 10Floor Vibration ..
WIND LOAD DESIGN. 12
Drift Limits 12“K" Bracing Frame Unbraced Frame Design ... 15 13Special Wind Frames 17
APPENDICES 23
LRFD Composite Beam Design. 23Composite Beam Load Capacity Enhancement 25Composite Beam Long Term Deflection Steel Joist Typical Bay 29 31K-Frame Bracing Optimization Unbraced Frame Design 3336
