35484 Approved Plans Ba · MCU21/0222.01

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:

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.

Steel Screw Piers Supporting the Slab:

Alternatively steel screw piers can be used to support the loads nominated in the structural plans. The slab piers
are to be designed and installed by a specialist contractor. Special attention must be paid to the extra thickening
and reinforcement required over each pier as detailed in the attached plan and details. The contractor must
satisfy themselves with the soils information contained herein to achieve the loads nominated on the structural
plans. Further testing may be required and is beyond the scope of this report.

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 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.

a)

Sean Richardson — RPEQ 5835
For and on behalf
SCG CONSULTING ENGINEERS

SCG Consulting Engineers 4 SCG Ref: 32027(S)