Guideline for a Mandatory Code of Practice > Safe Use of Conveyor Belt Installations for the Transportation of Mineral, Material or Personnel > Annexures > Annexure C: Ergonomic Data > C3 Upper Limb Reach Distance with Fixed Fences

C3.1 General

Selection of the appropriate safety distance for reaching over a fixed fence shall depend on a risk assessment. The assessment shall be based on the probability of occurrence of injury and the likely severity of that injury.

C3.2 Reaching down and over

When reaching down over an edge, e.g. on machine frames or barriers, the safety distance is found from Figure C2.

NOTE:

Attention is drawn to the increased danger of overbalancing when reaching over a lm high barrier

R1024 C3.2

Height of danger zone (h)	Horizontal distance to danger zone (s)
	Height of protective structure (u)*
	1 000†	1 200†	1 400†	1 600†	1 800	2 000	2 200	2 400	2 500
2 500	—	—	—	—	—	—	—	—	—
2 400	100	100	100	100	100	100	100	100	—
2 200	600	600	500	500	400	350	250	—	—
2 000	1 100	900	700	600	500	350	—	—	—
1 800	1 100	1 000	900	900	600	—	—	—	—
1 600	1 300	1 000	900	900	500	—	—	—	—
1 400	1 300	1 000	900	800	100	—	—	—	—
1 200	1 400	1 000	900	500	—	—	—	—	—
1 000	1 400	1 000	900	300	—	—	—	—	—
800	1 300	900	600	—	—	—	—	—	—
600	1 200	500	—	—	—	—	—	—	—
400	1 200	300	—	—	—	—	—	—	—
200	1 100	200	—	—	—	—	—	—	—
0	1 100	200	—	—	—	—	—	—	—

FIGURE C2: Guard distances

*	Protective structures less than 1000 mm height are not included because they do not sufficiently restrict movement of the body.

†	Protective structures having a height of 1600 mm and less should only be used where a risk assessment indicates low probability and low severity of injury.

NOTE:

1) There shall be no interpolation of the values in the Table.

2) Barriers are not foolproof and they cannot prevent access to persons intent on gaining access. Therefore, as a person's intent on reaching a dangerous part increases, e.g. by climbing on chairs, ladders or the barrier itself, the protection provided by a barrier decreases.

C3.3 Reaching under

Where clearance is provided under a guard for cleaning spillages, swarf and similar, the clearance shall not exceed 200 mm. (See also Figure C3.)

Mine Health and Safety Act, 1996 (Act No. 29 of 1996)

Regulations

Guideline for a Mandatory Code of Practice

Safe Use of Conveyor Belt Installations for the Transportation of Mineral, Material or Personnel

Annexures

Annexure C: Ergonomic Data - extracts from to AS1755-2000 (Normative)

C3 Upper Limb Reach Distance with Fixed Fences