soil test

Ground slabs may require thickenings or stiffening beams incorporated in their construction. It may be
advantageous to excavate them at the same time as the perimeter footings. Refer to the structural plans for
the locations and extent of these.

Where the stiffening beams intersect a perimeter footing, their base must be graded down to the footing
base level, 3 x N12 bars must be cogged into the footing and lapped 500 with the beams trench mesh.
Refer to the structural plans for details.

Where the stiffening beams intersect a blockbase or retaining wall, 3-N12 bars must be dowelled 150mm
into the blockbase and lapped 500 with the beams trench mesh. Refer to the structural plans for details.

A levelling layer under the ground floor slab is to comprise of granular material such as clean sand or
crusher dust compacted in 150mm layers. Either well graded sand or crusher dust can be used.

An approved polyethylene damp proof membrane of 0.2mm (min) thickness is to be placed over the levelling
layer. Laps are to be a minimum of 200mm and be taped. All service penetrations and punctures are to be
fully taped. The membrane is to be extended down the inside face of the perimeter footings and must
continue under any thickenings or stiffening beams.

Drilled Piers Supporting the Slab

Slab piers are required where there is more than 300mm of uncontrolled fill beneath the slab. They are to be
founded at a minimum of 300mm into the NATURAL MEDIUM DENSE SILTY SAND. Special attention must be
paid to the extra slab thickening required over slab piers as detailed in the structural plans.

Where drilled piers supporting columns or posts are not poured with the slab they must be connected to the
slab in the following manner:

   • 4-N12 bars must be anchored 500mm into the drilled pier and be bent 300mm horizontally into the
     footing or slab as required.

   • Where a column penetrates a beam or footing 3-N12 bars must be bent around the column to lap the
     trench mesh by 500mm both sides.

Drilled Pier Reinforcement

                           Pier Depth mm       Perimeter Piers      Slab Piers

                               up to 1500      None required       none required
                               1500-2500        2xN12bars          none required
                               2500-4000        4xN12bars           2xN12bars
                               4000-6000        6xN12 bars          4xN12bars

Pad Footing Details

All pad footings must be founded to the depth nominated on the structural plans. Where this depth is not
300mm into the NATURAL MEDIUM DENSE SILTY SAND they must be deepened down to this level.


NOTE: The information contained herein has been compiled following our field and laboratory
      testing, accepted engineering theory and discussions with and information supplied by our
      client, whom is noted on the header page of this report. We offer no warranty for the use of
      this report by other parties without prior written consent from this office.
        The report must be read in conjunction with the attached appendices. If you do not have a
        copy of these please contact our office and a copy can be issued to you.




for and on behalf
SCG CONSULTING ENGINEERS



    SCG Consulting Engineers                            4                               SCG Ref: 32303(S)