Council archive · source document
Scg 27099(S) · MCU17/0512
From the archive 15 Arakoon MCU.zip, inside MCU - Detached House - MCU17/0512. File date in the archive: 2017-04-27 09:27.
1.0 INTRODUCTION:
This company has performed a limited site investigation and established a site classification in accordance with
AS 2870-2011 at the above address. This site classification report does not include an assessment of Slope
Stability or Landslide Risk.
This report must be read and considered as a whole. All of our recommendations and
appendices attached must be read, considered and followed by all people involved in this
project including the client to ensure adequate long term performance of a footing system
constructed on this site. If you are unsure of any of the requirements herein, you must seek
clarification from this office.
2.0 SITE CLASSIFICATION:
After considering the results of our field investigation performed on 11/04/2017 we have classified this site as:
Class P
The classification has been calculated from test work performed on the soil profile encountered on the day of our
fieldwork and consideration of AS2870-2011. Any disturbance of the soil profile may result in a change to the
classification.
The ‘P’ classification relates to the loose sands and poor bearing capacity encountered during our testing on site.
Please refer to our definitions list appended to this report for further descriptions of these characteristics.
With respect to potential surface movements through seasonal moisture variations, the site could be considered
equivalent to a class S site.
Site Classification: The site classification is calculated in accordance with the “AS2870-2011 Residential Slabs
and Footings-Construction” and relates to the estimation of Ys, “The characteristic surface movement” within
reactive soil profiles. The limits used for this classification are as follows:
Predicted Surface Movement Classification
Ys = <=20mm S Slight
Ys = >20 – 40mm M Moderate
Ys = >40 – 60mm H1 High-1
Ys = 60 – 75mm H2 High-2
Ys = > 75mm E Extreme
Problem sites P Problem
3.0 SITE DESCRIPTION:
The construction area has a gradient in the order of 8%.
Vegetation on the construction area (and nearby surrounds) consists of grasses and scattered trees.
The existing surface drainage is good and sub-surface drainage is good.
4.0 FINDINGS:
The soil profiles encountered are shown on the attached borelog sections.
No water table was encountered during our testing program.
The sandy soils encountered are susceptible to collapse when unconfined. This may effect excavations and result
in additional earthworks and increased concrete volumes. Temporary shoring or Forma-Tube may be required to
retain the sands prior to concreting.
1
SCGCONSULTING ENGINEE SCG Ref: 27099(S)
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