ABSTRACT
For the co-ordinating size, which includes the width of one mortar joint, add 10 mm, i.e.
225 112.5 75 mm
Metric modular sizes:
190 90 65 mm
Other less available brick sizes:
215 102.5 50 mm 215 102.5 73 mm 215 102.5 80 mm
Spacing of wall ties 65-90 mm leaf thickness 450 horizontally/450 mm vertically Over 90 mm leaf thickness 900 horizontally/450 mm vertically For wider cavities spacing may decrease
Cavity wall ties
Cavity wall ties are made in stainless steel (wire diameters from 2.5-4.5 mm) or reinforced plastic for reduced thermal bridging, which can be equivalent to 50 mm of cavity insulation. Lengths are from 150-300 mm depending on wall thickness and cavity width. Extra-long ties are available for insulated cavities up to 250 mm wide.
