PERMALIGHT®-PRODUCTS|POINT THE WAY WITH SAFETY

How to determine the size of the sign?

The main factor for a good visibility of a safety sign is the size of the sign in proportion to the distance it is viewed from. The below picture illustrates the maximum distance that allows proper recognition of some standard sign sizes. According to DIN 4844 part 1 the height of the sign is essential.

The following formula is applied according to DIN 4844 part 1 to determine the size of a sign:

                           h= L / Z
                           h = hight of the sign
                           L = viewing distance
                           Z = distance

For prohibition and mandatory signs variable d (total diameter) is considered the height. For warning signage 0.817 x b (total width) is considered the height. For egress signs, fire safety and additional signage the variable a (total height) is considered the height.

For prohibition, mandatory and warning signs the distance factor (Z) is Z = 40m
for egress signs, informational signs and fire safety signs Z = 100

For the readability of the text on information or additional signs, i.e. for letters and numbers Z = 300

These specifications are guidelines. If you are unsure about the right size, we recommend to use the next larger size to be safe.