Summary
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.
Application
Block paving unit with permeability for achieving SuDS and surface water drainage.
Domestic and commercial use; hardstanding for vehicular and pedestrian pavements including footpaths, cycle tracks, driveways,
adoptable highways, commercial pavements, roof top and balcony applications.
Installation standard: BS 7533-3:2005 + A1:2009.
Block paving unit with permeability for achieving SuDS and surface water drainage.
Domestic and commercial use; hardstanding for vehicular and pedestrian pavements including footpaths, cycle tracks, driveways,
adoptable highways, commercial pavements, roof top and balcony applications.
Installation standard: BS 7533-3:2005 + A1:2009.
Description
Permeable paving block available in three sizes specifically designed to create the appearance of a traditional aged pavement whilst the interlocking nib design provides enhanced permeability rates for use within Sustainable Drainage Systems.
Alpha Flow blocks come with a number of matching products including circle packs and kerbs as well as an impermeable option suitable for both hand or machine lay installation.
When tested to BS DD 229: 1996 for Surface Permeability, Alpha Flow achieved 3386 mm/h.
Standards:
Brett Landscaping operate a number of independently audited management systems:
- BS EN ISO 9001: 2008 Quality Management System.
- BS EN ISO 14001: 2004 Environmental Management System.
- OHSAS 18001: 2007 Health and Safety Management System.
- BES 6001 Responsible Sourcing of Construction Products.
Permeable paving block available in three sizes specifically designed to create the appearance of a traditional aged pavement whilst the interlocking nib design provides enhanced permeability rates for use within Sustainable Drainage Systems.
Alpha Flow blocks come with a number of matching products including circle packs and kerbs as well as an impermeable option suitable for both hand or machine lay installation.
When tested to BS DD 229: 1996 for Surface Permeability, Alpha Flow achieved 3386 mm/h.
Standards:
Brett Landscaping operate a number of independently audited management systems:
- BS EN ISO 9001: 2008 Quality Management System.
- BS EN ISO 14001: 2004 Environmental Management System.
- OHSAS 18001: 2007 Health and Safety Management System.
- BES 6001 Responsible Sourcing of Construction Products.
Color
Gold, Brown, Black
Gold, Brown, Black
Finish
Textured
Textured
Material
Concrete
Concrete
Shape
Rectangle
Rectangle
Length
105 mm, 140 mm, 210 mm
105 mm, 140 mm, 210 mm
Width
140 mm
140 mm
Height
60 mm, 80 mm
60 mm, 80 mm
Specification
Classification data
Standard
To BS EN 1338: 2003.
To BS EN 1338: 2003.
Physical properties
-
-
Colour
Autumn Gold., Brindle., Charcoal.
Autumn Gold., Brindle., Charcoal.
Finish
Textured.
Textured.
Profile
-
-
Paver type
Regular plan form.
Regular plan form.
Arrises
Chamfered (aged).
Chamfered (aged).
Interlocking features
Spacer nibs.
Spacer nibs.
Dimensions and associated tolerances
-
-
Nominal sizes
105 x 140 x 60 mm., 140 x 140 x 60 mm., 210 x 140 x 60 mm.
105 x 140 x 80 mm., 140 x 140 x 80 mm., 210 x 140 x 80 mm.
Arrises
Chamfered.
Chamfered.
Weathering resistance
Class 3.
Class 3.
Abrasion resistance
Class 3.
Class 3.
Slip resistance
Unpolished Slip Resistance Value (USRV): ≥55; Potential for slip: Low.
Unpolished Slip Resistance Value (USRV): ≥55; Potential for slip: Low.
Recycled content (minimum)
Manufacturer's standard.
Manufacturer's standard.
Additional properties
Type
Hand lay.
Hand lay.
Other requirements
Not required., Permeable chippings joint material.
Not required., Permeable chippings joint material.
Third-party certification
CE marked.
CE marked.
Permeability
Surface permeability: 3386 mm/h when tested to BS DD 229:1996.
Surface permeability: 3386 mm/h when tested to BS DD 229:1996.
ThermalConductivity
1.2 W/m·K.
1.2 W/m·K.
Strength
Characteristic tensile splitting strength: ≥3.6 MPa; Failing load ≥250 N/mm.
Characteristic tensile splitting strength: ≥3.6 MPa; Failing load ≥250 N/mm.
Tolerances on plan dimension and thickness (nominal)
Thickness: ±3 mm; Plan size: ±2 mm.
Thickness: ±3 mm; Plan size: ±2 mm.