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Lap and securely tie all reinforcement that is not continuous. Fillblock cores after laying every three courses with well-compactedconcrete or poured grout.For wood construction, use-reinforcing straps at the foundation tothe header at the floor, diagonally tying studs, strapping corner studassemblies at third points, and tying rafters to top plates.5.2.7 Gravel - refers to small stones, generally 5-30 mm in diameter thatmay be angular or rounded. Angular gravels are usually sourced fromquarries, a by-product of the crushing processes, whereas roundedgravels are from a fluvial source, such as an old river bed, beaches, andchannel dredging. Gravels can be of almost any colour, depending on theparent rock type, or even a multi-coloured blendThe gravels most commonly used as a loose surface dressing are in the 6-20 mm size range. Anything less than 6 mm is more akin to a grit and istoo easily disturbed; anything over 18-20 mm can be difficult to walkupon. In general, the smaller 6-10 mm gravels would be used forfootpaths and the 10-18 mm gravels for driveways, but it really is amatter of personal taste. One deciding factor could be that, the smallerthe gravel, the more the cats like to use it as a toilet!54