Safety Distances Guide - First Aid - Troax

Height of
hazard
zone, a
Reaching over protective structures Reaching around with limitation
of movement
The dimensions and distances stated below are taken from
EN ISO 13857:2008, Table 2 – High risk. Dimension in millimetres
See also the calculation module in our
Customer Login area at www.troax.com
Height of protective structure, b
1000 1200 1400 1600 1800 2000 2200 2400 2500 2700
Horizontal safety distance to hazard zone, c
2700 0 0 0 0 0 0 0 0 0 0
2600 900 800 700 600 600 500 400 300 100 0
2400 1100 1000 900 800 700 600 400 300 100 0
2200 1300 1200 1000 900 800 600 400 300 0 0
2000 1400 1300 1100 900 800 600 400 0 0 0
1800 1500 1400 1100 900 800 600 0 0 0 0
1600 1500 1400 1100 900 800 500 0 0 0 0
1400 1500 1400 1100 900 800 0 0 0 0 0
1200 1500 1400 1100 900 700 0 0 0 0 0
1000 1500 1400 1000 800 0 0 0 0 0 0
800 1500 1300 900 600 0 0 0 0 0 0
600 1400 1300 800 0 0 0 0 0 0 0
400 1400 1200 400 0 0 0 0 0 0 0
200 1200 900 0 0 0 0 0 0 0 0
Protective structures lower than 1400 mm should not be used without additional safety measures.
Limitation of movement Safety distance, Sr
Illustration
Limitation of movement
only at shoulder and
armpit
Arm supported up to elbow
Arm supported out to wrist
Arm and hand supported
up to knuckle joint
850
550
230
130
A = The range of movement of the arm
Sr = The radial safety distance
Dimension in millimetres
a = This is either the diameter of a round
opening, or the side of a square
opening, or the width of a slot opening.
Fingertip
or hand
Reaching through regular openings
The values in the table below apply solely to persons aged 14 years and over.
Dimension in millimetres.
Part of body
Finger up to knuckle joint
Arm up to junction with
shoulder
Illustration Opening Slot
Safety distance, Sr
Square Round
The colour markings indicate which body parts are limited by size for each opening.
For openings >120 mm the safety distances for reaching over are used or other safety
measures are taken.
e 4
4 < e 6
6 < e 8
8 < e 10
10 < e 12
12 < e 20
20 < e 30
30 < e 40
40 < e 120
2
10
20
80
100
120
850 1)
850
850
1) If the length of the slot opening is 65 mm, the thumb will act as a stop and the safety
distance can be reduced to 200 mm.
2
5
15
25
80
120
120
200
850
2
5
5
20
80
120
120
120
850