Brett Alpha Flow is a surface-tumbled, permeable concrete block paving unit. Has the appearance of traditional aged pavement, and permeability for achieving SuDS and surface water drainage.
Brett Alpha Flow is a surface-tumbled, permeable concrete block paving unit. Has the appearance of traditional aged pavement, and permeability for achieving SuDS and surface water drainage.
Gold, Brown, Black
Gold, Brown, Black
Textured
Textured
Concrete
Concrete
Rectangle
Rectangle
105 mm, 140 mm, 210 mm
105 mm, 140 mm, 210 mm
140 mm
140 mm
60 mm, 80 mm
60 mm, 80 mm
Specification
To BS EN 1338: 2003.
To BS EN 1338: 2003.
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Autumn Gold., Brindle., Charcoal.
Autumn Gold., Brindle., Charcoal.
Textured.
Textured.
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-
Regular plan form.
Regular plan form.
Chamfered (aged).
Chamfered (aged).
Spacer nibs.
Spacer nibs.
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-
105 x 140 x 80 mm., 140 x 140 x 80 mm., 210 x 140 x 80 mm.
105 x 140 x 60 mm., 140 x 140 x 60 mm., 210 x 140 x 60 mm.
Chamfered.
Chamfered.
Class 3.
Class 3.
Class 3.
Class 3.
Unpolished Slip Resistance Value (USRV): ≥55; Potential for slip: Low.
Unpolished Slip Resistance Value (USRV): ≥55; Potential for slip: Low.
Manufacturer's standard.
Manufacturer's standard.
Additional properties
Hand lay.
Hand lay.
Not required., Permeable chippings joint material.
Not required., Permeable chippings joint material.
CE marked.
CE marked.
Surface permeability: 3386 mm/h when tested to BS DD 229:1996.
Surface permeability: 3386 mm/h when tested to BS DD 229:1996.
1.2 W/m·K.
1.2 W/m·K.
Characteristic tensile splitting strength: ≥3.6 MPa; Failing load ≥250 N/mm.
Characteristic tensile splitting strength: ≥3.6 MPa; Failing load ≥250 N/mm.
Thickness: ±3 mm; Plan size: ±2 mm.
Thickness: ±3 mm; Plan size: ±2 mm.