Attachment 4 - Site Investigation and Slab Report

                                                                         Infill panel




                                                                                                   7.4      Gable Ends
                                                                      Articulation joint located
                                                                                                   When gable roofs are used it is recommended that
                                                                      away from mid-point of       the masonry in the gable end wall be terminated
                         Maximum spacing from Table 2                 gable, where maximum         just above the eaves height, and framed construction
                                                                      movement occurs
                   (a)
                                                                                                   used above that level to limit the height of masonry.
                                                                                                       If the masonry does extend full height, it is
                                                                                                   preferable to avoid locating an articulation joint at
                                                                                                   the mid-point where there is maximum joint length
                                                                                                   and consequently maximum movement in the joint
                                                                                                   at the top. It is always preferable to locate the joint
                                                                                                   elsewhere in order to minimise its length Figure 30.
                                                                                                       Because of potential differential movement
                                                                                                   between the wall panels and the roof structure, the
                                                                                                   roof tiles should not be bedded onto the top of the
                                                                                                   gable-end wall. When articulated walls are used,
                                                                                                   the joint between the roof and walls should also
                                                                                                   allow the masonry walls to move independently.
                                                                                                   This may be done by finishing a tiled roof-edge with
                                                                                                   a timber or metal barge.

                                                                                                   7.5     Internal Partition Walls
                                                                                                   The majority of foundation movement generally
                                                                                                   occurs around the perimeter of a building where
                                                                                                   the soil is subject to seasonal moisture variations.
                                                                                                   Problems with cracking of brittle internal wall types
                                                                                                   (ie masonry walls) therefore typically occur at or
                                                                                                   near the junctions with external walls.
                                                                                                        With careful planning, internal walls need not
                                                                                                   require articulation joints other than at openings
                                                                                                   such as doorways or in corners of rooms. Where an
                   (b)
                                                                                                   articulation joint is unavoidable in long, unbroken
                                                                                                   runs of wall, it should be the same width and
                  Figure 30 Articulated masonry gable-end wall                                     formed in the same way as an external-wall joint.
                  (a) Location of articulation joint                                               Where possible, articulation joints should be located
                  (b) Use of infill panels above openings                                          in the corners of rooms or at doorways where they
                                                                                                   will be less obvious. Note that joints at corners
                                                                                                   should be located to maintain stability Figure 17.
                   Articulation joint        Articulation joint          Articulation joint            The abutting wall panels should be connected
                                                                         (If arch bar used, see
                                                  Infill                 Figures 10 and 12         across the articulation joint with masonry expansion
                                                  panel                  for details)              (sliding/extendable) ties of sufficient strength,
                                                                                                   number and spacing to transfer the calculated loads
                                                                                                   across the joint. As a guide, a minimum of three
                                                                                                   sliding ties should be installed.
                                                                                                        When internal masonry walls are to be rendered,
                                                                                                   a neat joint should be formed in the render over the
                                                                                                   articulation joint. It is advisable to fill this joint with
                                                                                                   an elastomeric sealant, which may be coloured or
                                                                                                   painted to match the wall finish.
                                                                                                        Sealants for internal articulation joints should
                                                                                                   be paintable such as polyurethane compounds.
                         Full-height              Standard-height           Standard-height        They may be applied to masonry, timber, metals
                         door and                 door and                  door and
                         full-height frame        full-height frame         standard metal frame   or plasterboard. They are available in a range of
                                                                                                   colours or may be painted to match surrounding
                  Figure 31 Options for installing door openings (and                              colours to reduce the visual impact of the joint.
                  articulation joints) in internal walls                                           The manufacturer’s recommendations regarding
                                                                                                   suitable paints should be followed.


Page 18 Articulated Walling