Faðade Access Equipment : Structural Design, Evaluation, and Testing PDF
Preview Faðade Access Equipment : Structural Design, Evaluation, and Testing
Façade Access Equipment Structural Design, Evaluation, and Testing Task Committee on Façade Access Design Guidelines Sponsored by Committee on Seismic Effects on Nonstructural Components of the Architectural Engineering Institute of the American Society of Civil Engineers Library of Congress Cataloging-in-Publication Data Façadeaccessequipment:structuraldesign,evaluation,andtesting/TaskCommitteeon Façade Access Design Guidelines ; sponsored by Committee on Seismic Effects on Nonstructural Components of the Architectural Engineering Institute of the American Society of Civil Engineers. pages cm Includes index. ISBN 978-0-7844-1401-9 (print : alk. paper) — ISBN 978-0-7844-7915-5 (ebook) 1. Scaffolding. 2. Facades—Maintenance and repair—Equipment and supplies. I. American Society of Civil Engineers. Task Committee on Façade Access Design Guidelines. II. Architectural Engineering Institute. Committee on Seismic Effects on Nonstructural Components. TH5281.F33 2015 690′.24—dc23 2015014059 Published by American Society of Civil Engineers 1801 Alexander Bell Drive Reston, Virginia 20191-4382 www.asce.org/bookstore | ascelibrary.org Anystatementsexpressedinthesematerialsarethoseoftheindividualauthorsanddonot necessarily represent the views ofASCE, whichtakes no responsibility foranystatement made herein. No reference made in this publication to any specific method, product, process, or service constitutes or implies an endorsement, recommendation, or warranty thereof by ASCE. The materials are for general information only and do not represent a standardofASCE,noraretheyintendedasareferenceinpurchasespecifications,contracts, regulations, statutes, or any other legal document. ASCE makes no representation or warrantyofanykind,whetherexpressorimplied,concerningtheaccuracy,completeness, suitability, or utility of any information, apparatus, product, or process discussed in this publication,andassumesnoliabilitytherefor.Theinformationcontainedinthesematerials shouldnotbeusedwithoutfirstsecuringcompetentadvicewithrespecttoitssuitabilityfor anygeneralorspecificapplication.Anyoneutilizingsuchinformationassumesallliability arisingfromsuchuse,includingbutnotlimitedtoinfringementofanypatentorpatents. ASCEandAmericanSocietyofCivilEngineers—RegisteredinU.S.PatentandTrademark Office. Photocopiesandpermissions.PermissiontophotocopyorreproducematerialfromASCE publicationscanberequestedbysendingane-mailtopermissions@asce.orgorbylocatinga titleinASCE’sCivilEngineeringDatabase(http://cedb.asce.org)orASCELibrary(http:// ascelibrary.org) and using the “Permissions” link. Errata: Errata, if any, can be found at http://dx.doi.org/10.1061/9780784414019. Copyright © 2015 by the American Society of Civil Engineers. All Rights Reserved. ISBN 978-0-7844-1401-9 (print) ISBN 978-0-7844-7915-5 (PDF) Manufactured in the United States of America. 22 21 20 19 18 17 16 15 1 2 3 4 5 Contents Preface.................................................................................................................................................v Introduction........................................................................................................1 Overview of OSHA Requirements..................................................................................1 Overview of Structural Load Testing...........................................................................6 Common Types of Façade Access Equipment........................................................9 1 Scope............................................................................................................17 1.1 General..........................................................................................................................17 2 Definitions...................................................................................................19 2.1 General..........................................................................................................................19 2.2 Definitions....................................................................................................................19 3 Design Requirements................................................................................23 3.1 General..........................................................................................................................23 3.2 Davits and Davit Bases.........................................................................................23 3.3 Outriggers....................................................................................................................24 3.4 Rooftop Carriages....................................................................................................24 3.5 Tieback Anchorages...............................................................................................25 3.6 Lifelines and Fall Arrest Anchorages.............................................................25 3.7 Fall Restraint Systems and Anchorages.......................................................27 3.8 Wind Sway Protection Systems........................................................................27 3.9 Platforms......................................................................................................................28 4 Evaluation and Testing.............................................................................29 4.1 General..........................................................................................................................29 4.2 Evaluation and Testing.........................................................................................29 Commentary C1 Scope.........................................................................................................33 C1.1 General....................................................................................................................33 C2 Definitions................................................................................................35 C2.1 General....................................................................................................................35 C2.2 Definitions..............................................................................................................35 iii iv CONTENTS C3 Design Requirements.............................................................................41 C3.1 General....................................................................................................................41 C3.2 Davits and Davit Bases...................................................................................41 C3.3 Outriggers..............................................................................................................42 C3.4 Rooftop Carriages..............................................................................................43 C3.5 Tieback Anchorages..........................................................................................44 C3.6 Lifelines and Fall Arrest Anchorages.......................................................44 C3.7 Fall Restraint Systems and Anchorages.................................................46 C3.8 Wind Sway Protection Systems..................................................................47 C3.9 Platforms................................................................................................................48 C4 Evaluation and Testing..........................................................................49 C4.1 General....................................................................................................................49 C4.2 Evaluation and Testing...................................................................................50 Index..................................................................................................................................................53 Preface This document was developed by the Architectural Engineering Institute (AEI) Task Committee on Façade Access Design Guidelines. The purpose of this document is to provide guidance to structural engineers, architects, building officials, andothers inthe architecturalandengineering industries regardingthe design, evaluation, and testing of permanently dedicated anchorages and com- ponents that support façade access equipment and fall-arrest systems. Thisguidelineaddressesthestructuralengineeringrequirementsapplicableto permanentbuilding-supportedfaçadeaccess equipmentcontainedin the United States Code of Federal Regulations (CFR), as promulgated by the Federal Occupational Safety and Health Administration (OSHA), as of July 1, 2014. Local building jurisdictions as well as state occupational safety and health administrations may have additional requirements that are not discussed in this document. For each specific project, applicable local and state requirements should be confirmed. The suggestions, recommendations, and commentary discussed in this documentareofferedinanadvisorycapacityonly.Thisdocumentisnotintended to serve as a building code. The guideline is divided into two sections: the guidelines and related commentary. v This page intentionally left blank Task Committee on Façade Access Guidelines of the Architectural Engineering Institute John Abruzzo, P.E. David Bonowitz, P.E., S.E. Richard A. Dethlefs, P.E., S.E. (Secretary) Charles W. Dolan, Ph.D., P.E. Howard Hill, Ph.D., P.E., S.E. Leonard M. Joseph, P.E., S.E. Rolf Larson, P.E. Frank Laux, S.E., R.A. (Vice Chair) Jonathan E. Lewis, S.E. Khalid Mosalam, Ph.D., P.E. Karl J. Rubenacker, P.E., S.E. Gwenyth R. Searer, P.E., S.E. (Chair) vii This page intentionally left blank Introduction OVERVIEW OF OSHA REQUIREMENTS OSHA has numerous requirements that govern the design, use, evaluation, and testing of façade access equipment. These requirements are part of the CFR. OSHA standards that govern façade access equipment are found in various sectionsin29CFR.Specifically,29CFR§1910coversGeneralIndustryrequire- ments (i.e., building maintenance), while 29 CFR §1926 covers Construction Industryrequirements.Althoughtherelevantstructuralrequirementsforfaçade access equipment are contained within 29 CFR §1910 and 29 CFR §1926, the requirementsareinterspersedwiththousandsofotherrequirementsthatarenot related to structural engineering. In addition, the provisions that are related to structural engineering are often less than clear in terms of their intent due to OSHA’s use of terminology that is not common in the structural engineering profession. For this reason, AEI is publishing this guideline to help engineers better understand the structural engineering requirements that govern the design, evaluation, and testing of permanent building-supported façade access equipment. Withinthispublication,thedesignation“29CFR”willbecommonlyunder- stood to precede all OSHA sections mentioned herein. All OSHA provisions quoted herein are current as of July 1, 2014. OSHA standards are available online at www.osha.gov. In addition to these standards,OSHApublishesofficialresponsestoquestionssubmittedinwritingby thepublic(i.e.,StandardInterpretations)thatareconsideredimportantclarifica- tions to the published standards. OSHA Structural Design Requirements ThefollowingdiscussioncoversOSHA’sbasicstructuraldesignrequirementsfor permanent building-supported façade access equipment. The discussion is not intendedtobeall-inclusive,butrathertoprovideinsightconcerningthestructural design provisions that follow. Platform Supports Platforms,whichmaybepoweredornon-powered,andincludebothscaffoldsand boatswain’schairs,aresuspendedworkareasthatcanberaised(dependingontype) and lowered along the face of a building. In all cases, OSHA requires platform/ scaffold support elements to be able to support 4 to 4.5 times the maximum 1
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