CS-20.12 Timber Edging for Seal, Asphalt, Paving, Concrete Work

1. All footpaths and vehicle crossing edges shall be contained by either a concrete kerb or edging, or by timber edge boards which shall form part of the finished work.
2. Edge boards shall be a minimum H4 graded, held firmly in place with wooden pegs (50mm x 25mm) or battens nailed to the outer edge at 1.0m centres and at every joining board. The pegs shall be in minimum lengths of 225mm (or long enough to be driven down into solid unyielding ground). Batter stakes may be used as pegs so long as they are driven into firm ground and trimmed to correct lengths.
3. All pegs shall sit 15mm-25mm below the top level of the edge boards.
4. Edge boards shall be joined with 400mm long boards (either edge board off cuts or 75mm x 25mm timbers) which will span the joint evenly and shall be nailed firmly in place. The top of the joining boards shall sit 15mm-25mm below the top level of the edge board.
5. The spacing of wooden pegs shall be adjusted so that a peg is positioned alongside every joining board.
6. All timber edging shall be backfilled as necessary outside the construction area to protect the timbers from being damaged or distorted from alignment and level during the preparation and compaction of the pavement course.
7. All edge boards shall be set out using string lines and shall be true and straight at the completion of the work.
8. If directed by the Engineer, existing timber edging in good condition shall be adjusted for level, repegged and incorporated in the new footpath or vehicle crossing.
9. Excavation for timber edging replacement, installation or adjustment, shall be the minimum required to provide an adequate work space.

Definitions in this section

Engineer

Footpath

Ground

Pavement