*Please note that this item is only available for local delivery or collection*
Graf RainBloc crates are individual modular cells which can be built up to form an underground structure for either the collection (attenuation) or dispersal (infiltration, also referred to as soakaway) of stormwater.
Supplied with 2 vertical connectors and 4 horizontal clips
Length 1200mm
Width 600mm
Height 420mm
Void Ratio 95%
Gross Volume 0.300m3
Net Volume 0.285m3
Ultimate Compressive Strength Vertical 450 kN/m2
Ultimate Compressive Strength Lateral 150 kN/m2
Miniumum & Maximum Cover Depths in metres - Based on backfill φ’ 300 density 20kN/m2 and tank of 0.84m (2 crates deep)
<3T | 12T | 40T | 60T | |
Min. Cover | 0.25m | 0.55m | 0.8m | 0.9m |
Max. Cover | 3.0m | 3.0m | 2.5m | 2.25m |