Wall ties should be of the correct length to ensure they are properly embedded in the masonry. The tie should have a minimum embedment of 50mm in each leaf but also take site tolerances into account for both cavity width and centring of the tie. For this reason Ancon recommends tie lengths which achieve an embedment of between 62.5mm and 75mm.
Cavity Width (mm)
Length of Wall Tie
50-75
200
76-100
225
101-125
250
126-150
275
Spacing for medium duty wall ties - cavity and veneer construction
Masonry Veneer Construction
Design Wind Speed
Cavity Masonry
450 Stud Walls
600 Stud Walls
W28-W41
600x600
600x450
600x600
Notes
1. Inner leaf masonry thickness 70 to 150 mm for cavity walls. 2. Around openings and at control joints, the vertical tie spacings are halved (ie the number of ties must be doubled). 3. In veneer construction, masonry must be tied to stud wall framing at all regular stud positions, including gable ends.
Veneer Ties
The spacing of veneer ties should be in accordance with building codes or engineers' specifications. There should be a minimum 15mm cover from any exposed surface.
Remedial Wall Ties
No standard has yet been defined for the spacing of remedial wall ties. However, accepted practice is to follow AS 3700.
