Advisory 104.1.1 Construction and Manufacturing Tolerances. Conventional industry tolerances recognized by this provision include those for field conditions and those that may be a necessary consequence of a particular manufacturing process.Recognized tolerances are not intended to apply to design work.It is good practice when specifying dimensions to avoid specifying a tolerance where dimensions are absolute.For example, if this document requires "1 inches," avoid specifying "1 inches plus or minus X inches." Where the requirement states a specified range, such as in Section 609.4 where grab bars must be installed between 33 inches and 36 inches above the floor, the range provides an adequate tolerance and therefore no tolerance outside of the range at either end point is permitted.This document contains scoping and technical requirements for accessibility to sites, facilities, buildings, and elements by individuals with disabilities.The requirements are to be applied during the design, construction, additions to, and alteration of sites, facilities, buildings, and elements to the extent required by regulations issued by Federal agencies under the Americans with Disabilities Act of 1990 (ADA). In addition to these requirements, covered entities must comply with the regulations issued by the Department of Justice and the Department of Transportation under the Americans with Disabilities Act.In the few places where requirements between the two differ, the requirements of 28 CFR 35.151 prevail.Compliance Date for Title II If the start date for construction is on or after March 15, 2012, all newly constructed or altered State and local government facilities must comply with the 2010 Standards.
Public accommodations and commercial facilities must follow the requirements of the 2010 Standards, including both the Title III regulations at 28 CFR part 36, subpart D; and the 2004 ADAAG at 36 CFR part 1191, appendices B and D.Adoption of the 2010 Standards also establishes a revised reference point for Title II entities that choose to make structural changes to existing facilities to meet their program accessibility requirements; and it establishes a similar reference for Title III entities undertaking readily achievable barrier removal.The Department has assembled this online version of the official 2010 Standards to increase its ease of use.Before that date, the 1991 Standards (without the elevator exemption), the UFAS, or the 2010 Standards may be used for such projects when the start of construction commences on or after September 15, 2010.(a) Design and construction (includes the exception for structural impracticability) (b) Alterations (includes alterations in historic properties, path of travel, and primary function) (c) Accessibility standards and compliance date (d) Scope of coverage (e) Social service center establishments (f) Housing at a place of education (g) Assembly areas (h) Medical care facilities (i) Curb ramps (j) Facilities with residential dwelling units for sale to individual owners (k) Detention and correctional facilities Chapter 3: Building Blocks Chapter 4: Accessible Routes Chapter 5: General Site And Building Elements Chapter 6: Plumbing Elements And Facilities Chapter 7: Communication Elements And Features Chapter 8: Special Rooms, Spaces and Elements Chapter 9: Built-In Elements Chapter 10: Recreation Facilities Public accommodations and commercial facilities must follow the requirements of the 2010 Standards, including both the Title III regulations at 28 CFR part 36, subpart D; and the 2004 ADAAG at 36 CFR part 1191, appendices B and D.