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

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

CONTENTS
FOREWORD
ASME BTH STANDARDS COMMITTEE ROSTER
CORRESPONDENCE WITH THE BTH COMMITTEE
ASME BTH-1–2023 SUMMARY OF CHANGES
Chapter 1 Scope, Definitions, and References [Go to Page]
1-1 PURPOSE
1-2 SCOPE
1-3 NEW AND EXISTING LIFTING DEVICES
1-4 GENERAL REQUIREMENTS [Go to Page]
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
1-4.6 Welding
1-4.7 Temperature
1-5 DEFINITIONS [Go to Page]
1-5.1 Definitions — General
1-5.2 Definitions for Chapter 3
1-5.3 Definitions for Chapter 4
1-5.4 Definitions for Chapter 5
1-5.5 Definitions for Chapter 6
1-6 SYMBOLS [Go to Page]
1-6.1 Symbols for Chapter 3
1-6.2 Symbols for Chapter 4
1-6.3 Symbols for Chapter 6
1-7 REFERENCES
Chapter 2 Lifting Device Classifications [Go to Page]
2-1 GENERAL [Go to Page]
2-1.1 Selection
2-1.2 Responsibility
2-1.3 Identification
2-1.4 Environment
2-2 DESIGN CATEGORY [Go to Page]
2-2.1 Design Category A
2-2.2 Design Category B
2-2.3 Design Category C
2-3 SERVICE CLASS
Chapter 3 Structural Design [Go to Page]
3-1 GENERAL [Go to Page]
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 [Go to Page]
3-2.1 Tension Members
3-2.2 Compression Members
3-2.3 Flexural Members
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 [Go to Page]
3-3.1 General
3-3.2 Bolted Connections
3-3.3 Pinned Connections
3-3.4 Welded Connections
3-4 FATIGUE DESIGN [Go to Page]
3-4.1 General
3-4.2 Lifting Device Classifications
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
3-5 OTHER DESIGN CONSIDERATIONS [Go to Page]
3-5.1 Impact Factors
3-5.2 Stress Concentrations
3-5.3 Deflection
Chapter 4 Mechanical Design [Go to Page]
4-1 GENERAL [Go to Page]
4-1.1 Purpose
4-1.2 Relation to Chapter 3
4-2 SHEAVES [Go to Page]
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 [Go to Page]
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 [Go to Page]
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 [Go to Page]
4-5.1 Gear Design
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 [Go to Page]
4-6.1 Bearing Design
4-6.2 L10 Bearing Life
4-6.3 Bearing Loadings
4-6.4 Sleeve and Journal Bearings
4-6.5 Lubrication
4-7 SHAFTING [Go to Page]
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
4-7.7 Shaft Displacement
4-8 FASTENERS [Go to Page]
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 [Go to Page]
4-9.1 Purpose
4-9.2 Pressure-Gripping and Indentation Lifting Device Support Force
4-10 VACUUM LIFTING DEVICE DESIGN [Go to Page]
4-10.1 Vacuum Pad Capacity
4-10.2 Intended Use Type
4-10.3 Vacuum Indicator
4-10.4 Unintended Operation
4-11 FLUID POWER SYSTEMS [Go to Page]
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
Chapter 5 Electrical Design [Go to Page]
5-1 GENERAL [Go to Page]
5-1.1 Purpose
5-1.2 Relation to Other Standards
5-1.3 Power Requirements
5-2 ELECTRIC MOTORS AND BRAKES [Go to Page]
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 [Go to Page]
5-3.1 Locating the Operator Interface
5-3.2 Unintended Operation
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 [Go to Page]
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
5-4.10 System Guarding
5-5 GROUNDING [Go to Page]
5-5.1 General
5-5.2 Grounding Method
5-6 POWER DISCONNECTS [Go to Page]
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 [Go to Page]
5-7.1 Battery Condition Indicator
5-7.2 Enclosures
5-7.3 Battery Alarm
Chapter 6 Lifting Magnet Design [Go to Page]
6-1 PURPOSE
6-2 DESIGN REQUIREMENTS [Go to Page]
6-2.1 General
6-2.2 Application and Environmental Profile
6-3 SELECTION AND DESIGN [Go to Page]
6-3.1 Components
6-3.2 Magnetic Circuit
6-3.3 Effective Magnet Contact Area
6-3.4 Flux Source
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
Figures [Go to Page]
Figure 1-5.5-1 Lifting Magnets
Figure 4-2.6-1 Sheave Dimensions
Figure 4-2.8-1 Sheave Gap
Figure 4-9.2-1 Illustration of Holding and Support Forces
Figure C-2.6-1 Selected Examples of Table 3-2.2-1 Requirements
Figure C-3.2-1 Block Shear
Figure C-3.3.1-1 Pin-Connected Plate Notation
Figure C-3.3.2-1 Stiffened Plate Lifting Beam
Tables [Go to Page]
Table 2-3-1 Service Class
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
Table 3-2.2-1 Limiting Width-Thickness Ratios for Compression Elements
Table 3-4.3-1 Allowable Stress Ranges, ksi (MPa)
Table 3-4.4-1 Fatigue Design Parameters
Table 4-5.3-1 Strength Factors for Calculating Load Capacity (American Standard Tooth Forms)
Table 4-6.2-1 L10 Bearing Life
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
Table 4-10.2-1 Intended Use Type Summary
Table B-3-1 Service Class Life
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
NONMANDATORY APPENDICES [Go to Page]
NONMANDATORY APPENDIX A COMMENTARY FOR CHAPTER 1: SCOPE, DEFINITIONS, AND REFERENCES [Go to Page]
A-1 PURPOSE
A-2 SCOPE
A-3 NEW AND EXISTING LIFTING DEVICES
A-4 GENERAL REQUIREMENTS
A-5 DEFINITIONS
A-6 SYMBOLS
A-7 REFERENCES
NONMANDATORY APPENDIX B COMMENTARY FOR CHAPTER 2: LIFTING DEVICE CLASSIFICATIONS [Go to Page]
B-1 GENERAL
B-2 DESIGN CATEGORY
B-3 SERVICE CLASS
NONMANDATORY APPENDIX C COMMENTARY FOR CHAPTER 3: STRUCTURAL DESIGN [Go to Page]
C-1 GENERAL
C-2 MEMBER DESIGN
C-3 CONNECTION DESIGN
C-4 FATIGUE DESIGN
C-5 OTHER DESIGN CONSIDERATIONS
NONMANDATORY APPENDIX D COMMENTARY FOR CHAPTER 4: MECHANICAL DESIGN [Go to Page]
D-1 GENERAL
D-2 SHEAVES
D-3 ROPE
D-4 DRIVE SYSTEMS
D-5 GEARING
D-6 BEARINGS
D-7 SHAFTING
D-8 FASTENERS
D-9 GRIP SUPPORT FORCE
D-10 VACUUM LIFTING DEVICE DESIGN
D-11 FLUID POWER SYSTEMS
NONMANDATORY APPENDIX E COMMENTARY FOR CHAPTER 5: ELECTRICAL DESIGN [Go to Page]
E-1 GENERAL
E-2 ELECTRIC MOTORS AND BRAKES
E-3 OPERATOR INTERFACE
E-4 CONTROLLERS AND AUXILIARY EQUIPMENT
E-5 GROUNDING
NONMANDATORY APPENDIX F COMMENTARY FOR CHAPTER 6: LIFTING MAGNET DESIGN [Go to Page]
F-3 SELECTION AND DESIGN [Go to Page]

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