Principles, Standards and Implementation

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Safety Distance Calculation

Introduction Formula Directions of Approach Speed Constant Stopping Time Depth Penetration Factor
Reach Through Applications Single or Multiple Beams Distance Calculations Angled Approaches Safety Mats Examples
Single or Multiple Beams

Single or multiple separate beams are further defined by the ISO EN standards. Table 5.1 shows the “practical” heights of multiple beams above the floor. The depth penetration is 850 mm for most cases and 1200 mm for the single beam usage. In comparison, the US CAN approach takes this into account by the Reach-Through requirements. Getting over, under or around the single and multiple beams must always be taken into consideration.

No. of Beams Height Above the Floor [mm (in.)] C [mm (in.)]
1 750 (29.5) 1200 (47.2)
2 400 (15.7), 900 (35.4) 850 (33.4)
3 300 (11.8), 700 (27.5), 1100 (43.3) 850 (33.4)
4 300 (11.8), 600 (23.6), 900 (35.4), 1200 (47.2) 850 (33.4)
 
Table 7: Single and Multiple Beam Heights and Depth Penetration Factor