Glass Surfaces

All glass surfaces that could be confused with doors or openings, as well as the glass
doors that do not have elements that can be identified, such as frames or handles, shall contain visual elements that guarantee its detection.


The marks shall consist of two horizontal bands, each at least 100 mm high, and shall have a reflectance contrast with the glass background of at least 30 points LRV (Light Reflectance Value).

 

The upper band shall be affixed at a height between 1400 mm and 1600 mm and the
lower band affixed at a height between 850 mm and 1000 mm above the floor.

 

It is not necessary to mark the glass surfaces with contrasted bands in the following
cases:
1. In glass surfaces of less than 500 mm in width.
2. The highest point of the glass surface is less than 850 mm.
3. If it has other opaque elements between 850 mm and 1700 mm occupying its entire
width.
4. If it has other types of marks (logo, artistic illustrations, etc.) that occupy 50% of the area between 850 mm and 1700 mm without empty spaces bigger than 500 mm wide.
5. Glass surfaces with fixed elements in front of it that block the entire approaching space.

 

 

Full Guidance

GG3
GG2
GG1

GG1

Glazed surfaces are identified clearly from adjacent doors or other openings

GG2

Presence of two horizontal bands of 100mm width with color of 50 LRV or any other pattern or design occupy 50% of the area between 850 – 1600mm, without empty space bigger than 500mm wide

GG3

First horizontal band height between 1400 – 1600mm from the ground level
Second horizontal band height between 850 – 1000mm from ground level

GG1
GG2
GG3

GG1

Glazed surfaces are identified clearly from adjacent doors or other openings

GG2

Presence of two horizontal bands of 100mm width with color of 50 LRV or any other pattern or design occupy 50% of the area between 850 – 1600mm, without empty space bigger than 500mm wide

GG3

First horizontal band height between 1400 – 1600mm from the ground level
Second horizontal band height between 850 – 1000mm from ground level

Glossary of Terms

Tactile pavements are textured surfaces with contrasted colour that are perceptible and identifiable by feel or cane or residual functional vision that warns or informs people with visual disabilities.

Truncated domes in a grid pattern to provide a tactile surface under feet of blind users. They are used as a used as a warning of upcoming level changes or obstacles on the course of travel.

Flat topped elongated bars in the paving surface under feet of blind people. They are used as a directional sign to assist the independent mobility of people with visual disabilities.

Pendulum test value (PTV) is a measurement of the slip resistance of a floor surface, either an external or internal floor of a building. The least slip resistance a surface material is, the more likely people may skid or trip, especially in wet conditions. In average circumstances, slip-resistance is as follows:

0-18 = very low slip-resistance.

18-25 = moderate slip-resistance.

25-36 = good slip resistance.

Light Reflectance Value (LRV) is a numeric scale that is used to identify how much light a colour reflects or absorbs. It is used in universal design to identify the contrast between two colours. This can help to determine if there is sufficient contrast to visually identify a feature such as a fonts on a sign, elevator call button, a handrail and other items which need to be seen by visually impaired people.

The interaction space is the space required by a person to interact with another person, furniture, appliance, machine or another element.

Tools and Templates

Building Entrances
Entrance Lobbies

Relevant Guidance