2012MBSM_FINAL_Oct12_CDversion.pdf - Metal Building Systems Manual 2012 Edition METAL BUILDING MANUFACTURERS ASSOCIATION Based on the 2012 IBC\u00ae

2012MBSM_FINAL_Oct12_CDversion.pdf - Metal Building Systems...

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Unformatted text preview: Metal Building Systems Manual 2012 Edition METAL BUILDING MANUFACTURERS ASSOCIATION Based on the 2012 IBC®, ASCE/SEI 7-10, and Common Industry Practices METAL BUILDING MANUFACTURERS ASSOCIATION 2012 Metal Building Systems Manual METAL BUILDING MANUFACTURERS ASSOCIATION 1300 Sumner Avenue Cleveland, Ohio 44115 Copyright © 2012 Metal Building Manufacturers Association, Inc. All rights reserved Metal Building Systems Manual ii Metal Building Systems Manual 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 2006 edition with 2010 Supplement. 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. This 2012 edition of the MBMA Metal Building Systems Manual brings the manual into conformance with the 2012 Edition of the International Building Code and ASCE 7-10. It incorporates the results of research and development undertaken by MBMA, its member companies and other industry groups. It also updates referenced standards to the current editions. Although every effort has been made to present accurate and sound information, the responsibility for individual project's rests with the design professional and contract parties. 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. MBMA DISCLAIMS ANY AND ALL WARRANTIES EXPRESS AND IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. iii Metal Building Systems Manual iv Metal Building Systems Manual TABLE OF CONTENTS LIST OF FIGURES .................................................................................................................................................... xi LIST OF TABLES .................................................................................................................................................... xiii LIST OF DESIGN EXAMPLES .................................................................................................................................. xiv CHAPTER I DESIGN PRACTICE AND LOAD APPLICATION .............................................................................. 1 1.1 BACKGROUND............................................................................................................................................. 1 1.2 DESIGN PRACTICE ........................................................................................................................................ 3 1.3 LOAD APPLICATION ...................................................................................................................................... 3 1.3.1 Definitions ....................................................................................................................................... 4 1.3.2 Live Loads ........................................................................................................................................ 7 1.3.3 Roof Live Loads ................................................................................................................................ 8 1.3.4 Wind Loads .................................................................................................................................... 11 1.3.5 Snow Loads .................................................................................................................................. 134 1.3.6 Seismic Loads............................................................................................................................... 174 1.3.7 LOAD COMBINATIONS ................................................................................................................................. 235 CHAPTER II CRANE LOADS ...................................................................................................................... 237 2.1 GENERAL ............................................................................................................................................... 237 2.2 CRANE TYPES .......................................................................................................................................... 237 2.2.1 Top Running Cranes ..................................................................................................................... 238 2.2.2 Underhung Bridge Cranes ........................................................................................................... 240 2.2.3 Underhung Monorail Cranes ....................................................................................................... 240 2.2.4 Jib Cranes..................................................................................................................................... 241 2.2.5 Single Leg Gantry Crane .............................................................................................................. 243 2.2.6 Stacker Crane .............................................................................................................................. 244 2.3 CRANE SPECIFICATIONS ............................................................................................................................ 245 2.3.1 Bridge or Monorail Cranes .......................................................................................................... 245 2.3.2 Jib Cranes..................................................................................................................................... 248 2.4 CRANE LOADS ......................................................................................................................................... 248 2.4.1 Wheel Load .................................................................................................................................. 248 2.4.2 Vertical Impact ............................................................................................................................ 249 2.4.3 Lateral Force ................................................................................................................................ 249 2.4.4 Longitudinal Force ....................................................................................................................... 249 2.4.5 Crane Loading Conditions ............................................................................................................ 250 2.5 BUILDING FRAMES AND SUPPORT COLUMNS ................................................................................................ 250 2.5.1 Single Crane Aisle with One Crane .............................................................................................. 250 2.5.2 Single Crane Aisle with Multiple Cranes ...................................................................................... 251 2.5.3 Multiple Crane Aisles with Single Cranes..................................................................................... 251 2.5.4 Multiple Crane Aisles with Multiple Cranes ................................................................................. 251 2.5.5 Deflection and Drift ..................................................................................................................... 253 2.5.6 Building Layouts .......................................................................................................................... 253 2.5.7 Brackets and Crane Columns ....................................................................................................... 257 2.6 RUNWAY BEAMS AND SUSPENSION SYSTEMS ................................................................................................ 258 2.6.1 Single Crane ................................................................................................................................. 259 2.6.2 Multiple Cranes ........................................................................................................................... 259 2.6.3 Top‐Running Bridge Cranes ......................................................................................................... 260 2.6.4 Underhung Cranes and Monorails .............................................................................................. 261 2.7 LONGITUDINAL CRANE AISLE BRACING ........................................................................................................ 263 2.7.1 Single Crane ................................................................................................................................. 263 2.7.2 Multiple Cranes ........................................................................................................................... 263 v Metal Building Systems Manual 2.7.3 Longitudinal Deformations Due to Thermal Expansion .............................................................. 264 2.8 RUNWAY STOPS ..................................................................................................................................... 265 2.9 FATIGUE ............................................................................................................................................... 265 2.9.1 Crane Service Classifications ....................................................................................................... 265 2.9.2 Designing for Fatigue ................................................................................................................. 267 2.10 CRANE WHEELS AND RAILS ....................................................................................................................... 268 2.10.1 Crane Wheels .............................................................................................................................. 268 2.10.2 Rails ............................................................................................................................................ 269 2.10.3 Rail Attachments ........................................................................................................................ 272 2.11 HEAVY‐DUTY CYCLE CRANES .................................................................................................................... 274 2.11.1 Crane Runway Loading ............................................................................................................... 274 2.11.2 Building Classifications ............................................................................................................... 276 2.11.3 AIST Load Combinations ............................................................................................................. 277 2.11.4 Deflection ................................................................................................................................... 278 2.11.5 Fatigue ........................................................................................................................................ 278 2.11.6 Detailing and Fabrication Considerations .................................................................................. 278 2.12 SPECIFICATION OF CRANE SYSTEMS ............................................................................................................ 282 2.13 ERECTION ............................................................................................................................................. 282 2.14 OPERATION AND MAINTENANCE ............................................................................................................... 282 2.15 CRANE EXAMPLE .................................................................................................................................... 283 CHAPTER III SERVICEABILITY .................................................................................................................. 289 3.1 INTRODUCTION ...................................................................................................................................... 289 3.2 DESIGN CONSIDERATIONS RELATIVE TO ROOFING ......................................................................................... 297 3.2.1 Metal Roofs ................................................................................................................................ 305 3.3 DESIGN CONSIDERATIONS RELATIVE TO SKYLIGHTS ........................................................................................ 306 3.4 DESIGN CONSIDERATIONS RELATIVE TO CLADDING, FRAME DEFORMATION AND DRIFT ........................................ 309 3.5 DESIGN CONSIDERATIONS RELATIVE TO INTERIOR PARTITIONS AND CEILINGS ..................................................... 318 3.6 DESIGN CONSIDERATIONS RELATIVE TO VIBRATION / ACCELERATION ................................................................ 324 3.7 DESIGN CONSIDERATIONS RELATIVE TO EQUIPMENT...................................................................................... 325 CHAPTER IV COMMON INDUSTRY PRACTICES ......................................................................................... 335 SECTION 1 ‒ INTRODUCTION ................................................................................................................................ 335 1.1 Introduction ...................................................................................................................................... 335 1.2 Definitions ........................................................................................................................................ 335 SECTION 2 ‒ SALE OF A METAL BUILDING SYSTEM ................................................................................................... 338 2.1 General ............................................................................................................................................. 338 2.2 Changes in Order Documents or Contract Documents ..................................................................... 339 SECTION 3 ‒ DESIGN OF A METAL BUILDING SYSTEM................................................................................................ 340 3.1 Design Responsibility ........................................................................................................................ 340 3.2 End Customer Responsibility ............................................................................................................ 341 3.3 Manufacturer's Responsibility .......................................................................................................... 343 SECTION 4 – MATERIALS AND FABRICATION ............................................................................................................ 345 4.1 Materials and Material Tests ........................................................................................................... 345 4.2 Fabrication........................................................................................................................................ 345 SECTION 5 ‒ DELIVERY AND RECEIPT ..................................................................................................................... 349 5.1 Delivery ............................................................................................................................................. 349 5.2 Receipt .............................................................................................................................................. 349 SECTION 6 ‒ ERECTION AND OTHER FIELD WORK .................................................................................................... 351 6.1 General ............................................................................................................................................. 351 6.2 Metal Building Systems Erection and Other Field Work ................................................................... 351 6.3 Site Survey ........................................................................................................................................ 352 6.4 Concrete Slab, Foundation and Anchor Bolt Setting ......................................................................... 352 vi Metal Building Systems Manual 6.5 Interruptions, Delays, or Overtime Wages ........................................................................................ 352 6.6 Hazardous Job Site Conditions........................................................................................................... 353 6.7 Accessibility of Job Site and Building Floor Area ............................................................................... 353 6.8 Erection Tolerances ........................................................................................................................... 353 6.9 Method or Sequence of Erection ....................................................................................................... 353 6.10 Correction of Errors and Repairs ..................................................................................................... 356 SECTION 7 ‒ INSURANCE ...................................................................................................................................... 358 7.1 General .............................................................................................................................................. 358 7.2 Manufacturer Insurance .................................................................................................................... 358 7.3 Dealer, Erector, Contractor and General Contractor Insurance ........................................................ 358 7.4 End Customer Insurance .................................................................................................................... 359 7.5 Leased Equipment Insurance ............................................................................................................. 359 7.6 Insurance Certificates ........................................................................................................................ 359 SECTION 8 ‒ GENERAL ......................................................................................................................................... 360 8.1 Permits, Assessments, Pro Rata and Other Fees ............................................................................... 360 8.2 Code or Deed Restriction Compliance ............................................................................................... 360 8.3 Postponement of Shipment ................
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