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Issued June 1995 NZS 4202: 1 995 SECTION 4 - UNDERPINNING 4.1 OVERVIEW Referto section O, General rules, which shall be read in conjunction with this section. 4.2 PREAMBLES 4.2.1 Particulars shall be given of: (a) (b) (c) (d) (e) The length of wall to be underpinned; The maximum depth of excavation below existing ground level, or reduced level if applicable; The lengths and sequence of work to be carried out in one operation; Any exceptional conditions relating to the works; Any samples or tests required, both of the materials and the finished work. 4.3 GENERAL PRINCIPLES 4.3.1 All the work directly related to Underpinning shall be scheduled in accordance with the various sections of this Standard Method of Measurement unless otherwise stated. 4.3.2 The description shall give particulars of the disposal of excavated material. 4.4 MEASUREMENT PROCEDURE 4.4.1 The sections to be underpinned shall be measured separately stating the length and height of the underpinning and the size, number and sequence of the stages in which the underpinning is to be executed. 4.4.2 The width of excavation shall be taken from the face of the wall or footing to be underpinned whichever is the greater and in accordance with: Depth of trench (m) Not exceeding 1.5 Exceeding 1.5 but not exceeding 3.0 Exceeding 3.0 Width to be taken from wall face (m) 1 .o 1.5 2.0 --`,,``,,,,,,``,``,`,,,`,,,`,-`-`,,`,,`,`,,`--- Copyright Standards New Zealand Provided by IHS under license with SNZ Document provided by IHS Licensee=<strong>Unitec</strong> Inst of Technology/5911177001, 03/02/2005 18:31:52 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. 4-1
~~~~ ~~ SNZ NZSa4202 95 m 8583369 0042479 O92 m NZS 4202: 1 995 Issued June 1995 4.4.3 Planking and strutting for underpinning shall be measured separately in square metres of surface area and the depth stated. 4.4.4 An item shall be measured for temporary shoring and supports to the wall to be underpinned. --`,,``,,,,,,``,``,`,,,`,,,`,-`-`,,`,,`,`,,`--- 4.4.5 Wedging or dry packing shall be measured in metres, where the width does not exceed 300 mm. Where the width exceeds 300 mm wedging or dry packing shall be measured in square metres. 4.4.6 Removal of projecting footingsshall be measured in metres. The width and thickness or, where applicable, the measurement in cubic metres shall be stated. 4-2 Copyright Standards New Zealand Provided by IHS under license with SNZ Document provided by IHS Licensee=<strong>Unitec</strong> Inst of Technology/5911177001, 03/02/2005 18:31:52 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295.
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