ISO 14122-3:2016 機械の安全性—機械への恒久的なアクセス手段—パート3：階段、脚立、ガードレール | ページ 6

3.1

stairs

step ladders

succession of horizontal levels — steps (3.1.11) and landings (3.1.5) — allowing passage on foot from one level to another

Note 1 to entry: Stairs/step ladders are composed of the elements shown in Figure 1 and defined in 3.1.1 to 3.1.16.

3.1.1

climbing height

vertical distance between the reference level and the landing (3.1.5)

Note 1 to entry: See H in Figure 1.

3.1.2

flight

uninterrupted sequence of steps (3.1.11) between two landings (3.1.5)

3.1.3

going

horizontal distance between the step nosing (3.1.12) of two consecutive steps

Note 1 to entry: See g in Figure 1.

3.1.4

head-height

minimum vertical distance, clear of all obstacles (such as beams, ducts, etc.) above the pitch line (3.1.8)

Note 1 to entry: See e in Figure 1.

3.1.5

landing

horizontal resting area situated at the end of a flight (3.1.2)

3.1.6

walking line

theoretical line indicating the average path of the users

3.1.7

overlap

difference between the depth of the step and the going (3.1.3)

Note 1 to entry: See r in Figure 1.

3.1.8

pitch line

notional line connecting the leading edge of the nosing (3.1.12) of successive steps (3.1.11) taken on the walking line (3.1.6) and which extends down to the landing at the bottom of the flight (3.1.2) from the nosing on the landing at the top of the flight

Note 1 to entry: See p in Figure 1.

3.1.9

angle of pitch

<stair or step ladder> angle between the pitch line (3.1.8) and its projection on the horizontal level

Note 1 to entry: See α in Figure 1.

3.1.10

rise

height between two consecutive steps (3.1.11) measured from the tread surface of one to the tread surface of the next

Note 1 to entry: See h in Figure 1.

3.1.11

step

horizontal surface on which one places the foot to go up or down the stair/step ladder (3.1)

3.1.12

nosing

top edge at the front of the step (3.1.11) or landing (3.1.5)

3.1.13

string

flanking framework element supporting the steps (3.1.11)

3.1.14

width

clear distance over the outside faces of the step (3.1.11)

Note 1 to entry: See w in Figure 1.

3.1.15

depth of step

clear distance from the leading edge or the nosing (3.1.12) to the rear of the step (3.1.11)

Note 1 to entry: See t in Figure 1.

3.1.16

clearance

absolute minimum clear distance between any obstacle and the pitch line (3.1.8) , measured at an angle of 90° from the pitch line

Note 1 to entry: See c in Figure 1.

3.2

guard-rail

device for protection against accidental fall sideways with which stairs/ step ladders (3.1) or landings (3.1.5) , platforms and walkways may be equipped

3.2.1

handrail

rigid top element designed to be grasped by the hand for body support which can be used individually or as the upper part of a guard-rail (3.2)

Note 1 to entry: See 1 in Figure 2.

3.2.2

knee rail

rigid element of the guard-rail (3.2) placed parallel with the handrail (3.2.1) , giving extra protection against the passage of a body

Note 1 to entry: See 2 in Figure 2.

3.2.3

stanchion

vertical structural element of the guard-rail (3.2) to anchor the guard-rail to the platform or stair (3.1)

Note 1 to entry: See 4 in Figure 2.

3.2.4

toe-plate

rigid lower part of a guard-rail (3.2) to prevent the falling of objects from floor level

Note 1 to entry: See 3 in Figure 2.

Note 2 to entry: A toe-plate also reduces the free space between the floor and knee rail (3.2.2) to prevent the passage of a body.

3.2.5

self-closing gate

pivoting part of the guard-rail (3.2) which enables access through the guard-rail

Note 1 to entry: See Figure 10.

Note 2 to entry: The rest position is closed.

3.2.6

mezzanine gate

gate designed for loading and unloading goods to and from mezzanine floor providing a permanent collective fall protection

3.2.7

transfer zone

area defined by the loading zone and the space needed for the movement of the mezzanine gate (3.2.6)