AISC DESIGN GUIDE 25
Frame Design Using Web-Tapered Members
|Publication Date:||1 January 2011|
This document provides suggested methods for the design of web-tapered I-shaped beams and columns, as well as frames that incorporate web-tapered I-shaped beams and/or columns. Both the requirements for analysis and rules for proportioning of web-tapered framing members are addressed. The emphasis is on members and frames with proportions and bracing details commonly used in metal building systems. However, this information is equally applicable to similar tapered members used in conventional steel construction.
The methods contained herein are primarily interpretations of, and extensions to, the provisions of the 2005 AISC Specification for Structural Steel Buildings (AISC, 2005), hereafter referred to as the AISC Specification. The recommendations of this document apply equally to the 2010 AISC Specification for Structural Steel Buildings, although some section and equation numbers have changed in the 2010 AISC Specification. These recommendations are not intended to apply to structures designed using earlier editions of the AISC Specification.
The 2005 AISC Specification is a significant departure from past AISC Specifications, particularly the ASD Specifications, with which almost all metal buildings have been designed in the United States. Engineers and other users familiar with the previous ASD editions will find significant changes in the presentation of the AISC Specification, the member design provisions, and the requirements for analysis. The AISC Specification contains no provisions specific to tapered members. The methods presented in this document comply with the 2005 AISC Specification and provide additional information needed to apply the Specification to tapered members. In some instances, procedures are provided for situations not addressed by the AISC Specification. These are noted where they occur.
The publication of the recommendations in this document is not intended to preclude the use of other methods that comply with the AISC Specification.