Specifications
Earthworks construction (F1)
Published: 1997
This specification and guidance notes cover the construction of earthworks including the clearing and removal of all obstacles within the limits of the earthworks, the excavation of all cuts, including excavation below the final subgrade surface, the excavation of borrow areas, benches and surface drainage facilities, the carting of the excavated material to fill or waste, construction of the fills and subgrade and shaping, trimming, grassing and maintaining of the works.
Pipe subsoil drain construction (F2)
Published: 2013
This specification refers to pipe subsoil drains including the construction of trenches, the supplying and laying of perforated pipes of the specified type and size, the jointing of the pipes, the supplying and compacting of approved backfilling materials and the construction of connecting and outlet drains. Subsoil drainage can improve the soil moisture relationship by keeping the ground water-table well beneath the paved surface.
Pipe culvert construction (F3)
Published: 2010
Specification and guidance notes for pipe culverts including the construction of trenches, supply and placement of bedding, supply and laying of pipes, jointing of the pipes, construction of headwalls, wing-walls, aprons, drops and intakes and outlet structures, the construction of connecting and outlet drains as well as backfill of trenches and reinstatement. Consideration should be given in specifying in the specific contract documents the pipe installation in accordance with a relevant standard that will result in improved methods for construction, for example, NZS 4406: 1984.
Corrugated plastic pipe subsoil drain construction (F5)
Published: 2000
This specification and guidance notes refer to the use of perforated corrugated plastic pipe of up to 110mm nominal outside diameter in subsoil drains under light duty conditions, eg for use in agricultural land, playing fields and lightly loaded or load protected sections of the highway environment. The drains described in F5 may be used for road or civil engineering works not subjected to heavy vehicular traffic.
Fabric wrapped aggregate subsoil drain construction (F6)
Published: 2003
This specification and guidance notes apply to the construction of subsoil drains which consist of geotextile lined trenches filled with drainage aggregate. Pipes may or may not be placed in this drainage aggregate.
Geotextiles (F7)
Published: 2003
This specification and guidance notes set out the material and construction requirements for geotextiles for use as separation and/or filtration applications in highway earthworks and pavements.
Guidelines/advice notes
Highway structures design guideHighway structures design guide (draft)
Published:20162015 (draft)
The Highway structures design guide sets out the NZ Transport Agency’s design requirements for all highway structures on the state highway network. It also sets out the Transport Agency’s design requirements for earthworks, including natural slopes, embankments and cuttings.
Bosspipe product and TNZ F/3 specification for pipe culvert construction (TM 1003)
Bosspipe product and TNZ F/2 specification for pipe subsoil drain construction (TM 1004)
Published: 2008
These memos provide advice on using Bosspipe as an alternative to materials in F2 and F3 specifications.
For further information contact bridgemanual@nzta.govt.nz .