MCU14/0024 - Response to Information Request - Attachment 4

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 block base or retai ing 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 Stab

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:

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

e 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 Depthmm | 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 regort must be read in conjunction with the attached appendices. If you do not have a
copy ese please contact our office and a copy can be issued to you.

   

for and on behal

SCG Consulting Engineers 1 SCG Ref: 23277(S)