Inclusive Design: Exploring the Features of Type C (Visitable) Units

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Inclusive Design: Exploring the Features of Type C (Visitable) Units​

Introduction to Type C Units

In the quest to create more inclusive living environments, the concept of Type C (Visitable) units has emerged as a crucial element in residential architecture. Introduced in the 2009 edition of ANSI A117.7, these units are designed to make homes accessible at a basic level, fostering an environment suitable for "aging-in-place" and ensuring that residences are visitable by people with mobility impairments. This approach not only caters to the needs of the aging population but also supports individuals who might experience temporary or permanent mobility challenges.

Design Philosophy of Type C Units

Type C units aim to provide minimum accessibility to enable mobility device users and those with physical limitations to visit homes without facing significant barriers. These units often serve as a foundational framework that communities can adopt to standardize basic accessibility in housing developments.

Key Requirements and Features of Type C Units

• General Accessibility: The units ensure that key areas of a home are accessible without any abrupt level changes or stairways, essential for people who use mobility devices or have difficulty climbing stairs.
• Circulation Paths: These are not fully compliant with "accessible route" standards but are tailored to connect critical areas such as the main entrance, toilet rooms, habitable spaces, and if available, food preparation areas.
• Entry and Doors:
  • At least one entrance must be accessible, typically from public streets, sidewalks, or garages.
  • Doorways must have a clear opening of at least 31¾ inches, allowing passage for most mobility aids.
• Thresholds and Ramps:
  • Thresholds must be limited to ½ inch in height, with exceptions for certain door types.
  • Ramps should comply with specific accessibility guidelines, although certain elements like handrails and edge protection may not be required under minimal change conditions.
• Toilet and Bathing Rooms:
  • Facilities on the entry level must be equipped for future installation of grab bars and provide necessary clearances around fixtures.
• Food Preparation Areas:
  • These areas should offer adequate maneuvering space, with specific clearances required between counters, appliances, and opposing surfaces.
• Lighting and Electrical Controls:
  • Controls and outlets must be placed within accessible reach ranges, typically between 15 and 48 inches above the floor.

Implications and Community Impact

By integrating Type C unit standards, communities and developers can enhance the functionality of homes, making them more accommodating for a diverse population. This not only benefits individuals with disabilities but also supports families where members might develop mobility issues as they age. Furthermore, these standards can serve as a model for local regulations, encouraging uniformity in accessible housing designs across different regions.

In Summary

Type C (Visitable) units represent a critical step forward in residential building design, combining practicality with foresight. These units are not just about compliance with building standards; they are about building homes that embrace everyone, regardless of their physical capabilities. As our population ages and the demand for accessible housing increases, the principles embodied in Type C units will likely become even more relevant, paving the way for more inclusive communities.