ASME BTH 1 2017
$98.04
ASME BTH-1 Design of Below-the-Hook Lifting Devices
| Published By | Publication Date | Number of Pages |
| ASME | 2017 | 85 |
ASME has been defining crane safety since 1916. BTH-1 provides minimum structural and mechanical design and electrical component selection criteria for ASME B30.20 below-the-hook lifting devices. The provisions in this Standard apply to the design or modification of below-the-hook lifting devices. Compliance with requirements and criteria that may be unique to specialized industries and environments is outside of the scope of this Standard. Lifting devices designed to this Standard shall comply with ASME B30.20, Below-the-Hook Lifting Devices. B30.20 includes provisions that apply to the marking, construction, installation, inspection, testing, maintenance, and operation of below-the-hook lifting devices. BTH-1 addresses only design requirements. As such, this Standard should be used in conjunction with B30.20, which addresses safety requirements. BTH-1 does not replace B30.20. The design criteria set forth are minimum requirements that may be increased at the discretion of the lifting device manufacturer or a qualified person. Key changes to this revision of BTH-1 include: • Addition of chapter of requirements for Lifting Magnet Design with additional commentary found in a corresponding new Nonmandatory Appendix • Addition of design requirements for new Design Category for specialized application in industries that require lifting designs based on a specified larger Design factor • Addition of new requirements for Member Properties • Updated Table 3-2.2-1 Limiting Width-Thickness Ratios for Compression Elements BTH-1 and B30.20 are to be used in conjunction with equipment described in other volumes of the ASME B30 series of Safety Standards. Careful application of these Safety Standards will help users to comply with applicable regulations within their jurisdictions, while achieving the operational and safety benefits to be gained from the many industry best-practices detailed in these volumes. Intended for manufacturers, owners, employers, users and others concerned with the specification, buying, maintenance, training and safe use of below-the-hook lifting devices with B30 equipment, plus all potential governing entities.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 6 | FOREWORD |
| 7 | STANDARDS COMMITTEE ROSTER |
| 8 | CORRESPONDENCE WITH THE BTH COMMITTEE |
| 10 | SUMMARY OF CHANGES |
| 14 | Chapter 1 Scope, Definitions, and References 1-1 PURPOSE 1-2 SCOPE 1-3 NEW AND EXISTING DEVICES 1-4 GENERAL REQUIREMENTS 1-4.1 Design Responsibility 1-4.2 Units of Measure 1-4.3 Design Criteria 1-4.4 Analysis Methods 1-4.5 Material |
| 15 | 1-4.6 Welding 1-4.7 Temperature 1-5 DEFINITIONS 1-5.1 Definitions — General |
| 16 | 1-5.2 Definitions for Chapter 3 1-5.3 Definitions for Chapter 4 |
| 17 | 1-5.4 Definitions for Chapter 5 1-5.5 Definitions for Chapter 6 |
| 18 | Figures Fig. 1-5.5-1 Magnetic Lifters |
| 19 | 1-6 SYMBOLS 1-6.1 Symbols for Chapter 3 |
| 21 | 1-6.2 Symbols for Chapter 4 |
| 22 | 1-6.3 Symbols for Chapter 6 1-7 REFERENCES |
| 24 | Chapter 2 Lifter Classifications 2-1 GENERAL 2-1.1 Selection 2-1.2 Responsibility 2-1.3 Identification 2-1.4 Environment 2-2 DESIGN CATEGORY 2-2.1 Design Category A 2-2.2 Design Category B 2-2.3 Design Category C 2-3 SERVICE CLASS Tables Table 2-3-1 Service Class |
| 25 | Chapter 3 Structural Design 3-1 GENERAL 3-1.1 Purpose 3-1.2 Loads 3-1.3 Static Design Basis 3-1.4 Fatigue Design Basis 3-1.5 Curved Members 3-1.6 Allowable Stresses 3-1.7 Member Properties 3-2 MEMBER DESIGN 3-2.1 Tension Members |
| 26 | 3-2.2 Compression Members 3-2.3 Flexural Members |
| 27 | Table 3-2.2-1 Limiting Width–Thickness Ratios for Compression Elements |
| 29 | 3-2.4 Combined Axial and Bending Stresses 3-2.5 Combined Normal and Shear Stresses |
| 30 | 3-2.6 Local Buckling 3-3 CONNECTION DESIGN 3-3.1 General 3-3.2 Bolted Connections |
| 31 | 3-3.3 Pinned Connections |
| 32 | 3-3.4 Welded Connections Table 3-3.4.2-1 Minimum Effective Throat Thickness of Partial-Penetration Groove Welds |
| 33 | 3-4 FATIGUE DESIGN 3-4.1 General 3-4.2 Lifter Classifications Table 3-3.4.3-1 Minimum Sizes of Fillet Welds |
| 34 | 3-4.3 Allowable Stress Ranges 3-4.4 Stress Categories 3-4.5 Tensile Fatigue in Threaded Fasteners 3-4.6 Cumulative Fatigue Analysis Table 3-4.3-1 Allowable Stress Ranges, ksi (MPa) |
| 35 | 3-5 OTHER DESIGN CONSIDERATIONS 3-5.1 Impact Factors 3-5.2 Stress Concentrations 3-5.3 Deflection |
| 36 | Table 3-4.4-1 Fatigue Design Parameters |
| 48 | Chapter 4 Mechanical Design 4-1 GENERAL 4-1.1 Purpose 4-1.2 Relation to Chapter 3 4-2 SHEAVES 4-2.1 Sheave Material 4-2.2 Running Sheaves 4-2.3 Equalizing Sheaves 4-2.4 Shaft Requirement 4-2.5 Lubrication 4-2.6 Sheave Design 4-2.7 Sheave Guard Fig. 4-2.6-1 Sheave Dimensions Fig. 4-2.7-1 Sheave Gap |
| 49 | 4-3 WIRE ROPE 4-3.1 Relation to Other Standards 4-3.2 Rope Selection 4-3.3 Environment 4-3.4 Fleet Angle 4-3.5 Rope Ends 4-3.6 Rope Clips 4-4 DRIVE SYSTEMS 4-4.1 Drive Adjustment 4-4.2 Drive Design 4-4.3 Commercial Components 4-4.4 Lubrication 4-4.5 Operator Protection 4-5 GEARING 4-5.1 Gear Design 4-5.2 Gear Material 4-5.3 Gear Loading 4-5.4 Relation to Other Standards |
| 50 | Table 4-5.3-1 Strength Factors for Calculating Load Capacity (American Standard Tooth Forms) |
| 51 | 4-5.5 Bevel and Worm Gears 4-5.6 Split Gears 4-5.7 Lubrication 4-5.8 Operator Protection 4-5.9 Reducers 4-6 BEARINGS 4-6.1 Bearing Design 4-6.2 L10 Bearing Life 4-6.3 Bearing Loadings 4-6.4 Sleeve and Journal Bearings Table 4-6.2-1 L10 Bearing Life |
| 52 | 4-6.5 Lubrication 4-7 SHAFTING 4-7.1 Shaft Design 4-7.2 Shaft Alignment 4-7.3 Operator Protection 4-7.4 Shaft Details 4-7.5 Shaft Static Stress 4-7.6 Shaft Fatigue |
| 53 | 4-7.7 Shaft Displacement 4-8 FASTENERS 4-8.1 Fastener Markings 4-8.2 Fastener Selection 4-8.3 Fastener Stresses Table 4-7.5-1 Key Size Versus Shaft Diameter (ASME B17.1) Table 4-7.5-2 Key Size Versus Shaft Diameter (DIN 6885-1) Table 4-7.6.1-1 Fatigue Stress Amplification Factors |
| 54 | 4-8.4 Fastener Integrity 4-8.5 Fastener Installation 4-8.6 Noncritical Fasteners 4-9 GRIP SUPPORT FORCE 4-9.1 Purpose 4-9.2 Pressure-Gripping and Indentation Lifter Support Force 4-10 VACUUM LIFTING DEVICE DESIGN 4-10.1 Vacuum Pad Capacity 4-10.2 Vacuum Preservation Fig. 4-9.2-1 Illustration of Holding and Support Forces |
| 55 | 4-10.3 Vacuum Indicator 4-10.4 Unintended Operation 4-11 FLUID POWER SYSTEMS 4-11.1 Purpose 4-11.2 Fluid Power Components 4-11.3 Power Source/Supply 4-11.4 Fluid Pressure Indication 4-11.5 Fluid Pressure Control 4-11.6 System Guarding |
| 56 | Chapter 5 Electrical Components 5-1 GENERAL 5-1.1 Purpose 5-1.2 Relation to Other Standards 5-1.3 Power Requirements 5-2 ELECTRIC MOTORS AND BRAKES 5-2.1 Motors 5-2.2 Motor Sizing 5-2.3 Temperature Rise 5-2.4 Insulation 5-2.5 Brakes 5-2.6 Voltage Rating 5-3 OPERATOR INTERFACE 5-3.1 Locating the Operator Interface 5-3.2 Unintended Operation |
| 57 | 5-3.3 Operating Levers 5-3.4 Control Circuits 5-3.5 Push Button Type 5-3.6 Push Button Markings 5-3.7 Sensor Protection 5-3.8 Indicators 5-4 CONTROLLERS AND AUXILIARY EQUIPMENT 5-4.1 Control Considerations 5-4.2 Control Location 5-4.3 Control Selection 5-4.4 Magnetic Control Contactors 5-4.5 Static and Inverter Controls 5-4.6 Lifting Magnet Controllers 5-4.7 Rectifiers 5-4.8 Electrical Enclosures 5-4.9 Branch Circuit Overcurrent Protection |
| 58 | 5-4.10 System Guarding 5-5 GROUNDING 5-5.1 General 5-5.2 Grounding Method 5-6 POWER DISCONNECTS 5-6.1 Disconnect for Powered Lifter 5-6.2 Disconnect for Vacuum Lifter 5-6.3 Disconnect for Magnet 5-7 BATTERIES 5-7.1 Battery Condition Indicator 5-7.2 Enclosures 5-7.3 Battery Alarm |
| 59 | Chapter 6 Lifting Magnet Design 6-1 PURPOSE 6-2 DESIGN REQUIREMENTS 6-2.1 General 6-2.2 Application and Environmental Profile 6-3 SELECTION AND DESIGN 6-3.1 Components 6-3.2 Magnetic Circuit 6-3.3 Effective Magnet Contact Area |
| 60 | 6-3.4 Flux Source |
| 61 | 6-3.5 Flux Path 6-3.6 Release Mechanism 6-3.7 Encapsulation Compound 6-3.8 Multiple Magnet Systems 6-3.9 Environmental Considerations |
| 62 | NONMANDATORY APPENDIX A COMMENTARY FOR CHAPTER 1: SCOPE, DEFINITIONS, AND REFERENCES A-1 PURPOSE A-2 SCOPE A-3 NEW AND EXISTING DEVICES A-4 GENERAL REQUIREMENTS A-4.1 Design Responsibility A-4.2 Units of Measure A-4.3 Design Criteria A-4.4 Analysis Methods |
| 63 | A-4.5 Material A-4.6 Welding A-4.7 Temperature A-5 DEFINITIONS A-6 SYMBOLS A-7 REFERENCES |
| 66 | NONMANDATORY APPENDIX B COMMENTARY FOR CHAPTER 2: LIFTER CLASSIFICATIONS B-1 GENERAL B-1.1 Selection B-1.3 Identification B-1.4 Environment B-2 DESIGN CATEGORY B-2.1 Design Category A B-2.2 Design Category B |
| 67 | Table B-3-1 Service Class Life B-2.3 Design Category C B-3 SERVICE CLASS |
| 68 | NONMANDATORY APPENDIX C COMMENTARY FOR CHAPTER 3: STRUCTURAL DESIGN C-1 GENERAL C-1.1 Purpose C-1.2 Loads C-1.3 Static Design Basis |
| 69 | Table C-1.3-1 Design Category A Static Load Spectrum Table C-1.3-2 Design Category A Dynamic Load Spectrum Table C-1.3-3 Design Category B Static Load Spectrum Table C-1.3-4 Design Category B Dynamic Load Spectrum |
| 70 | C-1.5 Curved Members C-1.6 Allowable Stresses C-1.7 Member Properties C-2 MEMBER DESIGN C-2.2 Compression Members C-2.3 Flexural Members |
| 71 | C-2.4 Combined Axial and Bending Stresses |
| 72 | Fig. C-2.6-1 Selected Examples of Table 3-2.2-1 Requirements C-2.5 Combined Normal and Shear Stresses C-2.6 Local Buckling C-3 CONNECTION DESIGN C-3.1 General |
| 73 | Fig. C-3.2-1 Block Shear C-3.2 Bolted Connections C-3.3 Pinned Connections |
| 74 | Fig. C-3.3.1-1 Pin-Connected Plate Notation Fig. C-3.3.2-1 Stiffened Plate Lifting Beam |
| 75 | C-3.4 Welded Connections C-4 FATIGUE DESIGN C-4.1 General C-4.2 Lifter Classifications C-4.3 Allowable Stress Ranges C-4.4 Stress Categories C-4.5 Tensile Fatigue in Threaded Fasteners C-4.6 Cumulative Fatigue Analysis |
| 76 | C-5 OTHER DESIGN CONSIDERATIONS C-5.1 Impact Factors C-5.2 Stress Concentrations C-5.3 Deflection |
| 77 | NONMANDATORY APPENDIX D COMMENTARY FOR CHAPTER 4: MECHANICAL DESIGN D-1 GENERAL D-1.1 Purpose D-1.2 Relation to Chapter 3 D-2 SHEAVES D-2.1 Sheave Material D-2.2 Running Sheaves D-2.4 Shaft Requirement D-2.5 Lubrication D-2.6 Sheave Design D-2.7 Sheave Guard |
| 78 | D-3 WIRE ROPE D-3.1 Relation to Other Standards D-3.2 Rope Selection D-3.3 Environment D-4 DRIVE SYSTEMS D-4.1 Drive Adjustment D-4.3 Commercial Components D-4.5 Operator Protection D-5 GEARING D-5.3 Gear Loading D-5.4 Relation to Other Standards D-5.7 Lubrication D-6 BEARINGS D-6.2 L10 Bearing Life D-6.3 Bearing Loadings |
| 79 | D-6.5 Lubrication D-7 SHAFTING D-7.5 Shaft Static Stress D-7.6 Shaft Fatigue D-8 FASTENERS D-8.5 Fastener Installation D-9 GRIP SUPPORT FORCE D-9.2 Pressure-Gripping and Indentation Lifter Support Force D-10 VACUUM LIFTING DEVICE DESIGN D-10.2 Vacuum Preservation D-11 FLUID POWER SYSTEMS D-11.2 Fluid Power Components |
| 80 | NONMANDATORY APPENDIX E COMMENTARY FOR CHAPTER 5: ELECTRICAL COMPONENTS E-1 GENERAL E-1.1 Purpose E-2 ELECTRIC MOTORS AND BRAKES E-2.1 Motors E-2.2 Motor Sizing E-2.4 Insulation E-2.5 Brakes E-2.6 Voltage Rating E-3 OPERATOR INTERFACE E-3.1 Locating the Operator Interface E-3.3 Operating Levers E-3.4 Control Circuits E-3.5 Push Button Type E-3.6 Push Button Markings E-4 CONTROLLERS AND AUXILIARY EQUIPMENT E-4.2 Control Location |
| 81 | E-4.4 Magnetic Control Contactors E-4.5 Static and Inverter Controls E-4.7 Rectifiers E-4.8 Electrical Enclosures E-5 GROUNDING E-5.1 Grounding Method |
| 82 | NONMANDATORY APPENDIX F COMMENTARY FOR CHAPTER 6: LIFTING MAGNET DESIGN F-3 SELECTION AND DESIGN F-3.3 Effective Magnet Contact Area F-3.4 Flux Source |
