Attachment 4 - Site Investigation and Slab Report

                                                                                                                              61
                                                                                                                              aug
                                                                                                                               2008
Technical note




                 Articulated Walling

                 Articulated
                 walling
                 PREFACE                                                deal only with angular distortions in walls due
                 In 1984 the Cement & Concrete Association of           to the response of a footing system to ground
                 Australia (now Cement Concrete & Aggregates            deformations. Other movements in masonry walls
                 Australia) published Construction Note 9 Articulated   are deemed to be accommodated by other types
                 Walling (CN9). It was replaced in 1991 by Technical    of control joints. This document nevertheless
                 Note 61 (TN61) under the same title. This first        recognises that it is often appropriate for articulation
                 edition of TN61 was a referenced document in           joints to be multi-purpose, ie to function as
                 AS 2870.1 – 1988 Residential Slabs and Footings –      expansion and/or contraction joints in addition to
                 Part 1: Construction.                                  their primary function.
                     A second edition of TN61 published in 1998
                 took into account the provisions of a replacement      1       SCOPE
                 Standard, ie AS 2870 – 1996 Residential Slabs and      This Technical Note deals with the articulation of
                 Footings – Construction. It remains a referenced       masonry walls, both internal and external, built on a
                 document in that Standard. It is also a referenced     concrete slab-on-ground or strip footing. The details
                 document in the Building Code of Australia (BCA),      included also provide guidance for the articulation
                 Volume 2 Housing Provisions.                           of masonry walls with other footing systems on
                     This third edition of TN61 also takes into         reactive soils, eg pier-and-beam footings.
                 account the requirements of all relevant Australian        The joint spacings and details given are intended
                 standards including the draft of the yet-to-be-        for masonry (brick and block) walls constructed of
                 published AS 4773 Construction Practices for           materials such as clay, concrete, calcium silicate or
                 Masonry in Small Buildings. The definition of          stone. Autoclaved aerated concrete (AAC) masonry
                 articulation joints used in this Standard has been     walls are not covered in this document. While the
                 adopted, ie as a subset of ‘Control Joints’ they       principles still apply, the joint spacing will need to
                                                                        be appropriate for the increased stiffness of the
                                                                        AAC wall system.