Glazed screens manifestation
Approved Document
Note: Where there appears to be a conflict between the guidance in Part M and Part N, Part M takes precedence.
Design Considerations
2.22. People with visual impairment should be in no doubt as to the location of glass doors especially when they are within a glazed
screen. The choice of different style of manifestation for the door and the glazed screen can help to differentiate between them.
2.24. Glass doors and glazed screens will satisfy Requirement M1 or M2 if:
2.24a. They are clearly defined with manifestation on the glass at two levels, 850 to 1000mm and 1400 to 1600mm, contrasting visually with the background seen through the glass (both from inside and outside) in all lighting conditions
2.24b. Manifestation takes the form of a logo or sign at least 150mm high (repeated if on a glazed screen), or a decorative feature such as
broken lines or continuous bands, at least 50mm high.
3.14. Corridors and passageways will satisfy the Requirement of M1 and M2 if:
3.14l. Any glazed screens alongside a corridor are clearly defined with manifestation on the glass at two levels, 850mm to 1000mm and 1400mm to 1600mm, contrasting visually with the background seen through the glass
in all lighting conditions (see illustrations above for details of manifestation).
Definitions
0.29. Contrast Visually
When used to indicate the visual perception of one element of the building, or fitting within the building, against another means that the difference in light reflectance value between the two surfaces is greater than 30 points.
