The calculation of the extent of surfacing, as set out in BS EN 1177 is as follows : Free Fall Height Extent of LIAS Less than 600 mm No recommendation for surfacing More than 600 mm and less than 1500 mm 1500 mm More than 1500 mm and less than 3000 mm (Free fall height x 0.667) + 500 mm Examples of how this works are: Fall height Surface distance 1.5 m 1.50 m 1.6 m 1.56 m 1.7 m 1.63 m 1.8 m 1.70 m 1.9 m 1.76 m 2.0 m 1.83 m 2.1 m 1.90 m 2.2 m 1.96 m Fall height Surface distance 2.3 m 2.03 m 2.4 m 2.10 m 2.5 m 2.16 m 2.6 m 2.23 m 2.7 m 2.30 m 2.8 m 2.37 m 2.9 m 2.43 m 3.0 m 2.50 m

Swings - Type 1 and Type 2

Seat width no greater than 500mm. Plan View Seat width greater than 500mm. Plan View Areas for two seats in one bay. Plan View Freespace: The free space is 500 mm from seat centre line measured horizontally to the front and 1000 mm either side with the seat at 60° to vertical. RoSPA consider that a barrier should be outside the loose-fill surfacing area.

Swings - Type 3

Plan View Free fall height - Forward and Back Free fall height is calculated from ther centre of the stationary seat surface at 60° (half swing suspension length + height of swing seat at rest (RoSPA suggests 635 mm) Side Elevation Length* Loose-fill 1.5 3.55 1.6 3.64 1.7 3.72 1.8 3.81 1.9 3.90 2.0 3.98 2.1 4.07 2.2 4.16 2.3 4.24 2.4 4.33 2.5 4.42

* - Length of suspension member (pivot to seat surface at 635 mm from LIAS) The above table has been calculated using the following formula:- 0.867 x length of suspension member + 2.25 metres

Slides - Type 1 and Type 2

Plan View Type 1 slide - 1 metre each side and 2 metres beyond the runout Type 2 slide - 1 metre each side and 1 metre beyond the runout

Cable Runways

Side Elevation Plan View

Rotating Equipment

There are no special extra requirements for surfacing areas. Surfaces should be continuous underneath and level.

Rocking Equipment

There are no special extra requirements for surfacing areas.