ASME BTH 1 2023

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ASME BTH-1-2023 Design of Below-the-Hook Lifting Devices

Published By	Publication Date	Number of Pages
ASME	2023

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Description

This Standard sets forth design criteria for ASME B30.20, Below-the-Hook Lifting Devices. This Standard serves as a guide to designers, manufacturers, purchasers, and users of below-the-hook lifting devices.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
6	FOREWORD
7	ASME BTH STANDARDS COMMITTEE ROSTER
8	CORRESPONDENCE WITH THE BTH COMMITTEE
9	ASME BTH-1–2023 SUMMARY OF CHANGES
12	Chapter 1 Scope, Definitions, and References 1-1 PURPOSE 1-2 SCOPE 1-3 NEW AND EXISTING LIFTING 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
13	1-4.6 Welding 1-4.7 Temperature 1-5 DEFINITIONS 1-5.1 Definitions — General
14	1-5.2 Definitions for Chapter 3 1-5.3 Definitions for Chapter 4
15	1-5.4 Definitions for Chapter 5 1-5.5 Definitions for Chapter 6
16	Figures Figure 1-5.5-1 Lifting Magnets
17	1-6 SYMBOLS 1-6.1 Symbols for Chapter 3
19	1-6.2 Symbols for Chapter 4 1-6.3 Symbols for Chapter 6
20	1-7 REFERENCES
21	Chapter 2 Lifting Device 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
22	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
23	3-2 MEMBER DESIGN 3-2.1 Tension Members 3-2.2 Compression Members 3-2.3 Flexural Members
24	Table 3-2.2-1 Limiting Width-Thickness Ratios for Compression Elements
27	3-2.4 Combined Axial and Bending Stresses 3-2.5 Combined Normal and Shear Stresses 3-2.6 Local Buckling 3-3 CONNECTION DESIGN 3-3.1 General
28	3-3.2 Bolted Connections 3-3.3 Pinned Connections
30	3-3.4 Welded Connections
31	3-4 FATIGUE DESIGN 3-4.1 General 3-4.2 Lifting Device Classifications Table 3-3.4.2-1 Minimum Effective Throat Thickness of Partial-Penetration Groove Welds Table 3-3.4.3-1 Minimum Sizes of Fillet Welds
32	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)
33	3-5 OTHER DESIGN CONSIDERATIONS 3-5.1 Impact Factors 3-5.2 Stress Concentrations 3-5.3 Deflection
34	Table 3-4.4-1 Fatigue Design Parameters
49	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 for Wire Rope 4-2.7 Sheave Design for Synthetic Rope 4-2.8 Sheave Guard 4-3 ROPE 4-3.1 Relation to Other Standards
50	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 Figure 4-2.6-1 Sheave Dimensions Figure 4-2.8-1 Sheave Gap
51	4-5.2 Gear Material 4-5.3 Gear Loading 4-5.4 Relation to Other Standards 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 Table 4-5.3-1 Strength Factors for Calculating Load Capacity (American Standard Tooth Forms)
52	4-6.4 Sleeve and Journal Bearings 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 Table 4-6.2-1 L10 Bearing Life
53	4-7.6 Shaft Fatigue 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	4-7.7 Shaft Displacement 4-8 FASTENERS 4-8.1 Fastener Markings 4-8.2 Fastener Selection 4-8.3 Fastener Stresses 4-8.4 Fastener Integrity 4-8.5 Fastener Installation 4-8.6 Noncritical Fasteners 4-9 GRIP SUPPORT FORCE 4-9.1 Purpose
55	4-9.2 Pressure-Gripping and Indentation Lifting Device Support Force 4-10 VACUUM LIFTING DEVICE DESIGN 4-10.1 Vacuum Pad Capacity 4-10.2 Intended Use Type Figure 4-9.2-1 Illustration of Holding and Support Forces
56	Table 4-10.2-1 Intended Use Type Summary
57	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
58	Chapter 5 Electrical Design 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
59	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
60	5-4.8 Electrical Enclosures 5-4.9 Branch Circuit Overcurrent Protection 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 Lifting Device 5-6.2 Disconnect for Vacuum Lifting Device 5-6.3 Disconnect for Lifting Magnet 5-7 BATTERIES 5-7.1 Battery Condition Indicator 5-7.2 Enclosures 5-7.3 Battery Alarm
61	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
62	6-3.4 Flux Source
63	6-3.5 Flux Path 6-3.6 Release Mechanism 6-3.7 Encapsulation Compound 6-3.8 Multiple Lifting Magnet Systems 6-3.9 Environmental Considerations
65	NONMANDATORY APPENDICES NONMANDATORY APPENDIX A COMMENTARY FOR CHAPTER 1: SCOPE, DEFINITIONS, AND REFERENCES A-1 PURPOSE A-2 SCOPE A-3 NEW AND EXISTING LIFTING DEVICES A-4 GENERAL REQUIREMENTS
66	A-5 DEFINITIONS
67	A-6 SYMBOLS A-7 REFERENCES
69	NONMANDATORY APPENDIX B COMMENTARY FOR CHAPTER 2: LIFTING DEVICE CLASSIFICATIONS B-1 GENERAL B-2 DESIGN CATEGORY
70	Table B-3-1 Service Class Life B-3 SERVICE CLASS
71	NONMANDATORY APPENDIX C COMMENTARY FOR CHAPTER 3: STRUCTURAL DESIGN C-1 GENERAL
72	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
73	Table C-1.3-4 Design Category B Dynamic Load Spectrum C-2 MEMBER DESIGN
75	Figure C-2.6-1 Selected Examples of Table 3-2.2-1 Requirements
76	Figure C-3.2-1 Block Shear C-3 CONNECTION DESIGN
77	Figure C-3.3.1-1 Pin-Connected Plate Notation Figure C-3.3.2-1 Stiffened Plate Lifting Beam
78	C-4 FATIGUE DESIGN
79	C-5 OTHER DESIGN CONSIDERATIONS
80	NONMANDATORY APPENDIX D COMMENTARY FOR CHAPTER 4: MECHANICAL DESIGN D-1 GENERAL D-2 SHEAVES
81	D-3 ROPE D-4 DRIVE SYSTEMS D-5 GEARING
82	D-6 BEARINGS D-7 SHAFTING D-8 FASTENERS D-9 GRIP SUPPORT FORCE D-10 VACUUM LIFTING DEVICE DESIGN
83	D-11 FLUID POWER SYSTEMS
84	NONMANDATORY APPENDIX E COMMENTARY FOR CHAPTER 5: ELECTRICAL DESIGN E-1 GENERAL E-2 ELECTRIC MOTORS AND BRAKES E-3 OPERATOR INTERFACE
85	E-4 CONTROLLERS AND AUXILIARY EQUIPMENT E-5 GROUNDING
86	NONMANDATORY APPENDIX F COMMENTARY FOR CHAPTER 6: LIFTING MAGNET DESIGN F-3 SELECTION AND DESIGN