Urban Management Division
Reference Specifications for Civil Engineering Work
S180 Unit Paving - Annexure
COMMENTARY
USING THE DOCUMENTS
The latest edition of this annexure can be obtained by down loading from internet site http://www.brisbane.qld.gov.au/business/developing in brisbane. The user can either mark up a paper copy to suit the proposed contract or edit the file direct in Microsoft Word 97 (or later). Please note that the section and page breaks in the Microsoft Word file have been inserted to suit double-sided printing.
This annexure forms part of a two-part specification system. The corresponding reference specification and this annexure must be incorporated in the tender documents either by reference alone (quoting an edition date) or both by reference and physical inclusion.
The annexure modifies the reference specification by additions, deletions or amendments and takes precedence over any inconsistent provisions in the reference specification. In particular, the annexure adapts the reference specification to the technical needs for the particular project. However the user may, alternatively, employ a ‘Job Specification’ to convey job-specific information. If both annexure and job specification are used, the job specification takes precedence.
Because of the job-specific nature of the annexure, it is important to identify the project adequately in the header to the annexure or in the text of each section (either by description or by a contract serial number).
CONTRACTUAL PROVISIONS
The reference specification and annexure deal only with technical and administrative matters. They do not deal with commercial arrangements. It is most important that they are used in conjunction with an adequate contract, which makes all necessary commercial arrangements including provisions for measurement of work and methods of payment.
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Urban Management Division
Reference Specifications for Civil Engineering Work
S180 Unit Paving - Annexure
INSPECTION (Clause 2.1)
Specify additional witness points for the Contract. [Insert the relevant requirements or insert ‘Not Applicable’]
Specify stages where notification is not required for the Contract. [Insert the relevant requirements or insert ‘Not Applicable’]
The reference specification has no hold points. If desired, some or all notification points can be made hold points and additional points can be added. Specify hold points (ie work stages that cannot proceed without approval) in the Contract. [Insert the relevant requirements or insert ‘Not Applicable’]
SAMPLES (Clause 2.2)
By default a sample panel of 20m2 is required. It can be part of the Works. No samples of pavers have been called for as it is assumed that they will be specified as a product. If pavers are a prime cost item and the Contractor is to carry out preliminary selection, stipulate the requirements here. [Insert the relevant requirements or insert ‘Not Applicable’]
PAVING SYSTEM (Clause 3.0)
The paving system must be specified on the drawings or here. There are no defaults. Specify for each type of paved area. [Insert the relevant requirements or insert ‘Not Applicable’]
Base type: (flexible/ concrete)
Base thickness:
Typically 200mm for flexible base and 125mm for concrete base.
Bedding type: (sand/ stabilised sand/ concrete/ none)
Specify ‘none’ only when pavers are to be laid on hardened concrete base, which can be adequately controlled for level ie for simple planar surfaces without critical edges. Concrete bedding would normally only be used with a concrete base. Most guidelines recommend against stabilised sand.
Adhesive mortar: (none/ cement/ polymer modified)
Use polymer mortar if placing directly on concrete base. Adhesive is only used for concrete bedding.
Paver type:
Normally by manufacturer's designation.
Colour:
Normally by manufacturer's designation.
Paver size and shape:
Specify dimensions for rectangular pavers. For interlocking types, specify shape A to the Concrete Masonry Association of Australia document MA 20 (or any other required shape).
Laying pattern: (herringbone/ stack bond/ header coursed)
Joint width:
Typically in the range of 1-3mm, depending on paver tolerance and joint material.
Joint material: (sand/ mortar)
Sand would normally be used for sand bedding and mortar with concrete bedding.
Joint colour:
Specify; if a special colour is required for mortar filling.
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