18.104.22.168 Wall Ties
Masonry accessory wall ties must be used to connect-
- Masonry veneer wall cladding to a timber or metal load bearing frame complying with the building codes and
- The two leaves of cavity masonry; and
- Two leaves of masonry forming a single wall with no cavity; and
- Intersecting masonry walls at a joint course bonding is not employed.
The building code states wall ties must be placed in the following location:
- Where articulation joints occur in masonry walls ties must be built in both sides of the joint and spaced not more than 300 mm from the joint.
- Masonry wall ties must be installed in such a manner as to prevent moisture travelling along the tie to the inner leaf of masonry or frame.
- Masonry veneer ties must be installed in accordance with building codes.
- Wall ties must be classified in accordance with AS/NSZ 2699.1 and installed as follows:
(i) Light duty ties must only be used in veneer clad buildings in areas where the design wind speed is not more than N2, and must be spaced in accordance with building code as if for medium duty ties.
(ii) Medium duty ties must be –
- for veneer and cavity construction – spaced in accordance with building code; and
- for solid or monolithic construction, in accordance with…
- Ties for solid or monolithic construction must be medium duty classification spaced not more than 400 mm in each direction and –
- the intersection of internal and external cavity or solid masonry walls must be bonded at the joint using medium duty ties at not more than 400 mm vertical spacing; and
- in walls more than 200 mm in thickness, an additional tie is required within the spacing specified for every 200 mm of thickness of the masonry units making the connection.
- masonry wall ties must be protected against corrosion in accordance with building code.