Access covers, frames and surround

S11.5.1: The installation, construction and maintenance of apparatus such as access covers and frames form an integral part of street works. Works undertaken to apparatus must be to the standard and specification of the owner of the apparatus.
S11.5.2: The sub-structure of an underground chamber supporting an access cover and frame is constructed in such a way that it is not usually possible to achieve a full depth reinstatement in the area defined as the ‘access surround’. The access surround is the area between the fixed feature (access frame) and the point at which a full depth reinstatement can be achieved with a full load transfer. In the area of the access surround, it may not be possible to reinstate surface or binder courses to the required thickness, e.g. where the distance between the frame and the surface is less than 100 mm. In this case, a surfacing material may be used as binder course.