Trees planted in parking lanes and medians must be large canopy trees, with all branches high enough to be clear of vehicles. Species with pendulous branches must not be used. Protect in parking lanes and centre of road medians from vehicle impact by using, in order of preference: 1st kerbs 2nd bollards or tree guards Locate trees in low points where runoff can be used for passive irrigation. Maximise the extent of permeable surfaces to let air and into the soil, especially within trees’ anticipated drip zone, and in low-lying pats of the street (e.g. along the kerbside parking lane) where water collects. Use subsoil drains in combination with bioretention type tree pits and permeable surfaces to avoid potential waterlogging of soils, and consequent damage to trees and weakening of pavements. Allow generous openings in pavements and flexible surfaces near trees to allow for growth of roots. Design Standards Tree island in centre of road parking area Use of structural soil for tree planting Developers should contact Council to discuss the incorporation of structural soils when trees are planted in footpaths and between parking bays in the road (i.e. areas subject to significant compaction). Liaison with Council’s Engineering Services Branch will help ensure the most appropriate Design Standard and structural soil specifications are applied. Design Standards Tree pit in combination with structural soil in lawn or garden areas Integrate large-scale WSUD features into the landscape if possible. For example: Locate trees in low points and swales where runoff can be used for passive irrigation Use bioretention basins where appropriate to filter rainwater runoff Install subsoil drains to avoid water-logging or use plants (e.g. trees, shrubs and/or ground covers) suited to periodic wet conditions. Protect trees from damage by mowers and string trimmers: In areas of closely spaced trees or copses, use a mulch surface or ground cover planting other than lawn. Design Standards Tree pit in lawn or mulched planter bed
Trees planted in parking lanes and medians must be large canopy trees, with all branches high enough to be clear of vehicles. Species with pendulous branches must not be used. Protect in parking lanes and centre of road medians from vehicle impact by using, in order of preference: 1st kerbs 2nd bollards or tree guards Locate trees in low points where runoff can be used for passive irrigation. Maximise the extent of permeable surfaces to let air and into the soil, especially within trees’ anticipated drip zone, and in low-lying pats of the street (e.g. along the kerbside parking lane) where water collects. Use subsoil drains in combination with bioretention type tree pits and permeable surfaces to avoid potential waterlogging of soils, and consequent damage to trees and weakening of pavements. Allow generous openings in pavements and flexible surfaces near trees to allow for growth of roots. Design Standards Tree island in centre of road parking area Use of structural soil for tree planting Developers should contact Council to discuss the incorporation of structural soils when trees are planted in footpaths and between parking bays in the road (i.e. areas subject to significant compaction). Liaison with Council’s Engineering Services Branch will help ensure the most appropriate Design Standard and structural soil specifications are applied. Design Standards Tree pit in combination with structural soil in lawn or garden areas Integrate large-scale WSUD features into the landscape if possible. For example: Locate trees in low points and swales where runoff can be used for passive irrigation Use bioretention basins where appropriate to filter rainwater runoff Install subsoil drains to avoid water-logging or use plants (e.g. trees, shrubs and/or ground covers) suited to periodic wet conditions. Protect trees from damage by mowers and string trimmers: In areas of closely spaced trees or copses, use a mulch surface or ground cover planting other than lawn. Design Standards Tree pit in lawn or mulched planter bed
docklands-design-construction-standards.docx