Glossary

2G PITCH

2G PITCH
Sand-based with short synthetic grass – best for hockey.

3G PITCH

3G PITCH
40mm – 65mm long synthetic grass with shock-absorbent rubber crumb and SBR infill. Best for football, more realistic and safer surface than 2G

4G, 5G AND 6G PITCHES

4G, 5G AND 6G PITCHES
Synthetic grass without need for rubber crumb. The existence of 4G, 5G and 6G pitches is not recognised by any accredited governing body.

AC 6 / AC14 / AC20 ETC

AC 6 / AC14 / AC20 ETC
Refers to the aggregate size of the macadam (6mm / 14mm / 20mm etc)

ALIPHATIC BINDER

ALIPHATIC BINDER
Aliphatic binders are clear in color, UV resistant and truly light stable, meaning that the color you have installed is the color the surface will remain. Aliphatic binders are more expensive than aromatic binders.

ALL WEATHER SURFACE

ALL WEATHER SURFACE
A playing surface unaffected by rain but affected by frost and snow.

AROMATIC BINDER

AROMATIC BINDER
Aromatic binders bond well to particles but tend to “yellow” the material. After a few months this “yellowing” will fade. Aromatic is honey colored to begin with and will darken most colors considerably as it is not truly UV resistant and light stable.

ARTIFICIAL GRASS

ARTIFICIAL GRASS
‘3G’ artificial grass with long pile and rubber particulate pile filling is less suitable for hockey. Competitive (i.e. full contact) rugby union and rugby league must be played on pitches which have a high degree of shock absorbency as specified by the NGBs of those sports.

BACK FILLED

BACK FILLED
To refill an excavated area with MOT Stone.

BASE (BINDER) COURSE

BASE (BINDER) COURSE
The lower surface beneath the wearing course, usually providing the variance in CFH.

BS EN1177

BS EN1177
BS EN 1177 specifies a method for determining the impact attenuation of playground surfacing.

CHASE CUTTING

CHASE CUTTING
To cut into the existing grass, concrete or macadam in order to create a ridge which the material can be ‘tucked’ into.

CONCRETE

CONCRETE
A strong building material made by mixing a cementing material (such as Portland cement) and a mineral aggregate (such as sand and gravel) with sufficient water to cause the cement to set and bind the entire mass.

CRITICAL FALL HEIGHT

CRITICAL FALL HEIGHT
Represents the greatest height of head first fall, from which a child, landing on a surface, could be expected to avoid ‘sustaining a critical’ head injury.

CURE TIME

CURE TIME
The time taken for the polymers within the binder to toughen or harden. Once the binder has fully cured, the surface is ready to walk on.
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