2006 Metal Building Systems Manual
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2006 Metal Building Systems Manual 50th Anniversary Edition METAL BUILDING MANUFACTURERS ASSOCIATION 1300 Sumner Avenue Cleveland, Ohio 44115 Copyright © 2006 Metal Building Manufacturers Association, Inc. All rights reserved PREFACE The MBMA Metal Building Systems Manual incorporates the results of research undertaken by MBMA, its member companies and other industry groups. In many respects, it reflects refinement and advances in the knowledge of load application methods and design. This edition of the Metal Building Systems Manual replaces the 2002 edition, and its release coincides with the 50th anniversary of the Metal Building Manufacturers Association. Most municipalities in the United States have now adopted a building code. In the past, where a building code did not govern the design, the recommended loads in the MBMA Low-Rise Building Systems Manual (the predecessor to the Metal Building Systems Manual) were often specified. In recognition of the decreased need for MBMA loads, the Metal Building Systems Manual now focuses on how to apply the loads specified by the International Building Code and ASCE 7. Although the information in the new manual can be applied to low-rise buildings in general, it concentrates on issues related to design, code compliance and specification of metal building systems. Use of this manual is totally voluntary. Each building manufacturer or designer retains the prerogative to choose its own design and commercial practices and the responsibility to design its building systems to comply with applicable specifications and safety considerations. Although every effort has been made to present accurate and sound engineering and design information, MBMA assumes no responsibility whatsoever for the application of this information to the design or construction of any specific building system. MBMA expressly disclaims all liability for damages of any sort whether direct, indirect or consequential, arising out of the use, reference to, or reliance on this manual or any of its contents. iii iv TABLE OF CONTENTS I. LOAD APPLICATION ................................................................................. 1.1 Background ...............................................................................................1 1.2 Design Practice..........................................................................................3 1.3 Load Application.......................................................................................3 1.3.1 Definitions..........................................................................................4 1.3.2 Live Loads .........................................................................................8 1.3.3 Roof Live Loads ................................................................................9 1.3.4 Wind Loads........................................................................................13 1.3.5 Snow Loads........................................................................................135 1.3.6 Seismic Loads ....................................................................................175 1.3.7 Load Combinations............................................................................214 II. CRANE LOADS............................................................................................ 2.1 General ......................................................................................................215 2.2 Crane Types ..............................................................................................215 2.3 Crane Specifications..................................................................................224 2.4 Crane Loads ..............................................................................................227 2.5 Building Frames and Support Columns....................................................230 2.6 Runway Beams and Suspension Systems .................................................238 2.7 Longitudinal Crane Aisle Bracing ............................................................243 2.8 Runway Stops ...........................................................................................245 2.9 Fatigue.......................................................................................................245 2.10 Crane Wheels and Rails ..........................................................................249 2.11 Heavy-Duty Cycle Cranes ......................................................................255 2.12 Specification of Crane Systems ..............................................................265 2.13 Erection...................................................................................................266 2.14 Operation and Maintenance ....................................................................266 2.15 Example...................................................................................................266 III. SERVICEABILITY .................................................................................... 3.1 Introduction...............................................................................................271 3.2 Considerations for Roofing.......................................................................279 3.3 Considerations for Skylights.....................................................................288 3.4 Considerations for Cladding, Frame Deformation and Drift ....................290 3.5 Considerations for Interior Partitions and Ceilings...................................300 3.6 Considerations for Vibration/Acceleration ...............................................307 3.7 Considerations for Equipment ..................................................................308 IV. COMMON INDUSTRY PRACTICES...................................................... Section 1 - Introduction 1.1 Introduction...............................................................................................316 1.2 Definitions.................................................................................................316 Section 2 – Sale of a Metal Building System 2.1 General ......................................................................................................319 2.2 Changes in Order Documents or Contract Documents.............................320 Section 3 – Design of Metal Building System 3.1 Design Responsibility ...............................................................................321 v 3.2 End Customer Responsibility....................................................................322 3.3 Manufacturer's Responsibility...................................................................324 Section 4 – Materials and Fabrication 4.1 Materials and Material Tests.....................................................................327 4.2 Fabrication.................................................................................................327 Section 5 – Delivery and Receipt 5.1 Delivery.....................................................................................................331 5.2 Receipt.......................................................................................................331 Section 6 – Erection and Other Field Work 6.1 General ......................................................................................................333 6.2 Metal Building Systems Erection and Other Field Work .........................333 6.3 Site Survey ................................................................................................335 6.4 Concrete Slab, Foundation and Anchor Bolt Setting................................335 6.5 Interruptions, Delays, or Overtime Wages................................................335 6.6 Hazardous Job Site Conditions .................................................................335 6.7 Accessibility of Job Site and Building Floor Area....................................335 6.8 Erection Tolerances...................................................................................336 6.9 Method or Sequence of Erection...............................................................336 6.10 Correction of Errors and Repairs ............................................................338 Section 7 – Insurance 7.1 General ......................................................................................................340 7.2 Manufacturer Insurance ............................................................................340 7.3 Dealer, Erector, Contractor and General Contractor Insurance ................341 7.4 End Customer Insurance ...........................................................................341 7.5 Leased Equipment Insurance ....................................................................341 7.6 Insurance Certificates................................................................................341 Section 8 – General 8.1 Permits, Assessments, Pro Rata and Other Fees.......................................342 8.2 Code or Deed Restriction Compliance......................................................342 8.3 Postponement of Shipment .......................................................................342 8.4 Penalties and Bonds ..................................................................................342 8.5 Completion and Acceptance .....................................................................343 8.6 Indemnification for Modifications, Adaptations and Repairs...................343 8.7 Consequential