Gives preferred coordinating dimensions for certain building components and assemblies which are dimensionally critical. Items dealt with include masonry and precast units, sheet materials, ceramic (or similar) tiles, doorsets, windows, roofing and cladding, roof lights, ceiling panels, flooring, and paving slabs. Recommendations for sizes of masonry panels, spacing of timber studs, and spacing of ceiling suspension rods are also given. Dimensions given are consistent with recommendations for coordinated preferred dimensions in building given in AS 1234 in which a basic module of 100 mm is used.