ASME BTH-1-2005 pdf download

ASME BTH-1-2005 pdf download.Design of Below-the- Hook Lifting Devices.
Each chapter of this Standard is accompanied by a commentary that explains, where necessary, the basis of the provisions of that chapter. All publications cited in these commentaries are listed below. These references are cited for information only.
Cornell, C.A., 1969, “A Probability-Based Structural Code,” AC! Journal, Vol. 66, No. 12
Publisher: American Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, Ml 48333
Ellifritt, D.S., Wine, G., Sputo, T., and Samuel, S., 1992, “Flexural Strength of WT Sections,” Engineering Journal, Vol. 29, No. 2
“Engineering FAQs Section 4.4.2,” www. aisc.org (2003)
Guide for the Analysis of Guy and Stiffleg Derricks, 1974
Load and Resistance Factor Design Specification for Structural Steel Buildings, 1994 and 2000
Specification for Structural Steel Buildings, 2005
Specification for Structural Steel Buildings — Allowable Stress Design and Plastic Design, 1989
Yura, J.A., and Frank, K.H., 1985, “Testing Method to Determine the Slip Coefficient for Coatings Used in Bolted Connections,” Engineering Journal, Vol. 22, No.3
Publisher: American Institute of Steel Construction (AISC), One East Wacker Drive, Chicago, IL
60601-2001
Madsen, J., 1941, “Report of Crane Girder Tests,” Iron and Steel Engineer, November
Technical Report No. 6, Specification for Electric Overhead Traveling Cranes for Steel Mill Service, 2000
Publisher: Association of Iron and Steel Engineers (AISE), Three Gateway Center, Pittsburgh, PA
15222-1004
ANSI/ABMA 9-1990 (R2000), Load Rating and Fatigue Life for Ball Bearings1
ANSI/ABMA 11-1990 (R1999), Load Rating and Fatigue Life for Roller Bearings1
Publisher: American Bearing Manufacturers Association (ABMA), 2025 M Street, NW, Washington, D.C. 20036
ANSI/AGMA 2001-C95, Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth1
Publisher: American Gear Manufacturers Association (AGMA), 500 Montgomery Street, Alexandria, VA
22314-1582
ANSI/AWS D14.1-97 Specification for Welding of Industrial and Mill Cranes and Other Material Handling Equipment1
Publisher: American Welding Society (AWS), 550 Le Jeune Road, Miami, FL 33126
Commentary: Ambient operating temperature limits are intended only to be a guideline. The component temperature of each part of the lifter must be considered when the device is operating in an environment outside the limits defined in para. 1-4.7. The effects of dust, moisture, and corrosive atmospheric substances on the integrity and performance of a lifter cannot be specifically defined. These design considerations must be evaluated and accounted for by the lifting device manufacturer or qualified person.
2-2 DESIGN CATEGORY
The design categories defined in paras. 2-2.1 and 2-2.2 provide for different design factors that establish the stress limits to be used in the design. The design factors are given in para. 3-1.3.
Lifters shall be designed to Design Category B, unless a qualified person determines that Design Category A is appropriate.
Commentary: When selecting a Design Category, consideration shall be given to all operations that will affect the lifting device design. The discussions of the Design Categories below and in Commentary for para. 3-1.3 refer to considerations given to unintended overloads in development of the design factors. These comments are in no way to be interpreted as permitting a lifting device to be used above its rated load under any circumstances other than for load testing in accordance with ASME B30.20 or other applicable safety standards or regulations.
2-2.1 Design Category A
(a) Design Category A should be designated when the magnitude and variation of loads applied to the lifter are predictable, where the loading and environmental conditions are accurately defined or not severe.
(b) Design Category A lifting devices shall be limited to Service Class 0.
(c) The nominal design factor for Design Category A shall be in accordance with para. 3-1.3.
Commentary: The design factor specified in Chapter 3 for Design Category A lifters is based on presumptions of rare and only minor unintended overloading, mild impact loads during routine use, and a maximum impact eretoperr of 50% Thee load conditions are characteristic of use
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