Unit 5: Space Planning for Accessibility

In this explanation of key terms and vocabulary for Unit 5: Space Planning for Accessibility in the Professional Certificate in Space Planning Standards, we will cover important concepts related to accessibility and space planning. The terms are organized alphabetically for ease of reference.

### Americans with Disabilities Act (ADA)

The Americans with Disabilities Act (ADA) is a federal civil rights law in the United States that prohibits discrimination against individuals with disabilities in all areas of public life, including employment, education, transportation, and access to public accommodations and services. The ADA was enacted in 1990 and has since set accessibility standards for buildings, facilities, and outdoor spaces. The ADA Accessibility Guidelines (ADAAG) provide detailed design and construction requirements for ensuring that spaces are accessible to individuals with disabilities.

### Clear Floor Space

Clear floor space refers to the unobstructed area required for a person using a mobility device, such as a wheelchair, to turn around or maneuver. The minimum clear floor space required depends on the size of the mobility device and the specific activity being performed. For example, a turning radius of at least 60 inches (152 cm) is required for a wheelchair to make a 180-degree turn. Space planners should ensure that there is sufficient clear floor space in all areas, including corridors, doorways, and workstations.

### Doorway Height and Width

Doorway height and width are critical elements of accessible space planning. The ADAAG recommends a minimum doorway width of 32 inches (81 cm) for hinged doors and 36 inches (91 cm) for sliding doors. The minimum height for doorways is 80 inches (203 cm), measured from the floor to the top of the door opening. Space planners should also consider the height and location of door handles, thresholds, and other hardware to ensure that they are easily accessible.

### Grab Bars

Grab bars are safety devices designed to provide support and stability for individuals with mobility impairments. They are typically installed in bathrooms, showers, and other areas where slipping or falling is a risk. Grab bars should be sturdy, slip-resistant, and installed at the correct height and location to provide maximum support. The ADAAG recommends a minimum grab bar length of 36 inches (91 cm) and a diameter of 1.25 to 2 inches (3.2 to 5 cm).

### Knee and Toe Clearance

Knee and toe clearance refer to the unobstructed space required for a person using a mobility device to approach and use a counter, desk, or other work surface. The minimum knee clearance is 27 inches (68.5 cm) high, measured from the floor to the bottom of the work surface. The minimum toe clearance is 9 inches (22.8 cm) high, measured from the floor to the bottom of the work surface. Space planners should ensure that there is sufficient knee and toe clearance in all areas, including kitchens, offices, and laboratories.

### Lighting

Lighting is an essential element of accessible space planning. Proper lighting can help individuals with visual impairments to navigate and use spaces more easily. Space planners should consider the type, location, and intensity of lighting to ensure that it is appropriate for the task, the user, and the environment. The ADAAG recommends a minimum illumination level of 5 foot-candles (53 lux) for general lighting and 10 foot-candles (108 lux) for task lighting.

### Reach Ranges

Reach ranges refer to the vertical and horizontal distances that a person can comfortably reach while standing or sitting. The ADAAG provides detailed specifications for reach ranges, including clear floor space, height, and location. For example, the maximum height for a wall-mounted control or sign is 48 inches (122 cm), measured from the floor to the highest point of the control or sign. Space planners should ensure that all controls, signs, and other features are within reach range for all users.

### Signage

Signage is a critical element of accessible space planning. Proper signage can help individuals with visual impairments to navigate and use spaces more easily. The ADAAG provides detailed specifications for signage, including size, location, color, and contrast. For example, the minimum height for a tactile character on a sign is 0.63 inches (16 mm), and the minimum height for a visual character is 0.25 inches (6 mm). Space planners should ensure that all signs are easily readable and understandable by all users.

### Space Standards

Space standards are minimum requirements for the size, layout, and functionality of spaces. Space standards are used to ensure that spaces are accessible, functional, and safe for all users. The ADAAG provides detailed space standards for various types of spaces, including corridors, doorways, workstations, and restrooms. Space planners should ensure that all spaces comply with the relevant space standards.

### Universal Design

Universal design is a design philosophy that emphasizes the creation of spaces that are accessible, usable, and comfortable for all users, regardless of their age, ability, or other characteristics. Universal design is based on seven principles, including equitable use, flexibility in use, simple and intuitive use, perceptible information, tolerance for error, low physical effort, and size and space for approach and use. Space planners should strive to incorporate universal design principles into all aspects of their work.

### Work Surface Height

Work surface height is the vertical distance between the floor and the top of a counter, desk, or other work surface. The ADAAG provides detailed specifications for work surface height, including clear floor space, knee clearance, and toe clearance. For example, the recommended height for a seated work surface is 29 inches (73.5 cm), measured from the floor to the top of the work surface. Space planners should ensure that all work surfaces are at the correct height and location to provide maximum accessibility and functionality.

In conclusion, accessibility is a critical element of space planning. By understanding and applying the key terms and concepts covered in this explanation, space planners can create spaces that are accessible, functional, and safe for all users. Space planners should strive to incorporate universal design principles and comply with all relevant accessibility standards and guidelines, including the ADA, to ensure that their work meets the needs of all users.

Challenge:

Consider a space you use regularly, such as your workplace or a public building. Identify three elements of the space that could be improved for accessibility. Describe how you would apply the key terms and concepts covered in this explanation to improve those elements.

Example:

In my workplace, the restrooms are not accessible to individuals who use wheelchairs or other mobility devices. To improve the restrooms for accessibility, I would:

1. Increase the doorway width to at least 32 inches (81 cm) to comply with ADAAG requirements. 2. Install grab bars in the stalls to provide support and stability for individuals with mobility impairments. 3. Lower the height of the paper towel dispenser and soap dispenser to within reach range for individuals in wheelchairs.

By applying the key terms and concepts covered in this explanation, I can help to ensure that the restrooms in my workplace are accessible, functional, and safe for all users.