Fixed features, e.g. kerbstones and related precast concrete products, channel blocks and drainage fixtures, surface boxes and ironware should be bedded on a sound foundation in accordance with the owner’s requirements to provide adequate support and mitigate rocking. In order to prevent excessive areas of standing water, it is necessary to set separate intervention limits for channel blocks, drainage fixtures, surface boxes and ironware.
For cable channels, the channel must be of sufficient dimension and design that any installed cable remains inside the channel at all times whilst in use and it is as level and flush as possible with the adjacent surfaces, i.e. the cable should not protrude outside the channel.
