Denotes an advisory specification or recommendation.Īccess Aisle. Denotes a mandatory specification or requirement. Denotes a specification that applies only when the conditions described are present. Meet one or more specifications of these guidelines. In the Appendix, the corresponding paragraph numbers are preceded by an A. Paragraphs marked with an asterisk have related, nonmandatory material in the Appendix. Additional information, explanations, and advisory materials are located in the Appendix. The text of these guidelines does not contain notes or footnotes. 3.2 Dimensional TolerancesĪll dimensions are subject to conventional building industry tolerances for field conditions. Where the dimension does not fit conveniently between lines, the measure line is extended beyond the lines and the dimension placed above (and below) the extension.ĭimensions that are not marked minimum or maximum are absolute, unless otherwise indicated in the text or captions. All dimensions are shown in inches above the measure line, with the metric equivalent below. The table describes graphic conventions used in the ADA Standards for Accessible Design for showing dimensions on figures, how the direction of approach is denoted, centerline designation and boundary of clear floor area. Graphic conventions are shown in Table 1: Table 1 Miscellaneous Instructions and Definitions 3.1 Graphic Conventions 2.2* Equivalent Facilitationĭepartures from particular technical and scoping requirements of this guideline by the use of other designs and technologies are permitted where the alternative designs and technologies used will provide substantially equivalent or greater access to and usability of the facility. The specifications in these guidelines are based upon adult dimensions and anthropometrics. Copies of the standard may be purchased from the American National Standards Institute at 1430 Broadway, New York, New York 10018. The illustrations and text of ANSI A117.1 are reproduced with permission from the American National Standards Institute.

However, sections 4.1.1 through 4.1.7 and sections 5 through 10 are different from ANSI A117.1 in their entirety and are printed in standard type. The technical specifications 4.2 through 4.35, of these guidelines are the same as those of the American National Standard Institute’s document A117.1-1980, except as noted in this text by italics. These guidelines are to be applied during the design, construction, and alteration of such buildings and facilities to the extent required by regulations issued by Federal agencies, including the Department of Justice, under the Americans with Disabilities Act of 1990. This document sets guidelines for accessibility to places of public accommodation and commercial facilities by individuals with disabilities.

Ada signage cad drawing