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  • Douglas Partners Pty Ltd ABN 75 053 980 117

    www.douglaspartners.com.au Unit 2, 73 Sheppard Street

    Hume ACT 2620 PO Box 1487

    Fyshwick ACT 2609 Phone (02) 6260 2788

    Fax (02) 6260 1147

    Brisbane • Cairns • Canberra • Darwin • Gladstone • Gold Coast • Macarthur • Melbourne • Newcastle • Perth • Sunshine Coast • Sydney • Townsville • Wollongong • Wyong

    SITE CLASSIFICATION REPORT BLOCK 1 SECTION 45 SUBURB. Lawson

    PROJECT No. 50640.08 Date January 2015

    CLIENT Brown Consulting (ACT) Pty Ltd Introduction: This report provides a site classification for Block 1, Section 45, Lawson, ACT prepared by Douglas Partners Pty Ltd in accordance with the guidelines of AS2870-2011 (Ref 1). Bulk Earthworks: Ground surface levels in Block 1 Section 45 have been lowered in cut as part of general regrading works completed during 2014 in Stage 1C of the Lawson South Estate. Depth of cut is estimated to range from 0.0 m to 2.0 m front to rear of the block. Subsurface Conditions: Subsurface conditions in Block 1 were assessed on the basis of two test pits dug by Douglas Partners Pty Ltd after the bulk earthworks had been completed. The strata exposed in the pits can be summarised as follows: Test Pit 1: Located midway on the north western boundary of Block 1. Medium to high strength, moderately to slightly weathered siltstone bedrock was encountered to the refusal depth of 0.2 m. Test Pit 2 - Located midway on the southern boundary of Block 1. Topsoil to 0.1 m depth was present over high strength, moderately to slightly weathered siltstone bedrock to the refusal depth of 0.2 m. Site Classification: Block 1, Section 45, Lawson is a Class A (stable) site. The site classification is applicable to structure types as described in AS 2870 – 2011 (Ref 1) and should be reassessed if ground levels are raised or lowered by more than about 0.5 m for a building platform. Footing Systems: AS2870-2011 (Ref 1) provides deemed-to-comply footing systems appropriate for a Class A site. Footing systems should be approved by a structural engineer and take account of the presence of any service trenches, backfill zones, retaining walls and underground structures that are within the stress zone of influence of the footings. Footings should be founded in the bedrock.

  • September 2011

    Introduction These notes are provided to amplify DP‘s inspection report in regard to the limitations of carrying out inspection work. Not all notes are necessarily relevant to this report. Standards This inspection report has been prepared by qualified personnel to current engineering standards of interpretation and analysis. Copyright and Limits of Use This inspection report is the property of DP and is provided for the exclusive use of the client for the specific project and purpose as described in the report. It should not be used by a third party for any purpose other than to confirm that the construction works addressed in the report have been inspected as described. Use of the inspection report is limited in accordance with the Conditions of Engagement for the commission. DP does not undertake to guarantee the works of the contractors or relieve them of their responsibility to produce a completed product conforming to the design. Reports This inspection report may include advice or opinion that is based on engineering and/or geological interpretation, information provided by the client or the client’s agent, and information gained from:

     an investigation report for the project (if available to DP);

     inspection of the work, exposed ground conditions, excavation spoil and performance of excavating equipment while DP was on site;

     investigation and testing that was carried out during the site inspection;

     anecdotal information provided by authoritative site personnel; and

     DP’s experience and knowledge of local

    geology. Such information may be limited by the frequency of any inspection or testing that was able to be practically carried out, including possible site or cost constraints imposed by the client/ contractor(s). For these reasons, the reliability of this inspection report is limited by the scope of information on which it relies. Every care is taken with the inspection report as it relates to interpretation of subsurface conditions and any recommendations or suggestions for construction or design. However, DP cannot anticipate or assume responsibility for:

     unexpected variations in subsurface conditions that are not evident from the inspection; and

     the actions of contractors responding to commercial pressures.

    Should these issues occur, then additional advice should be sought from DP and, if required, amendments made. This inspection report must be read in conjunction with any attached information. This inspection report should be kept in its entirety without separation of individual pages or sections. DP cannot be held responsible for interpretations or conclusions from review by others of this inspection report or test data, which are not otherwise supported by an expressed statement, interpretation, outcome or conclusion stated in this inspection report.

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