The covers in Lyndhurst are usually made of metal
, concrete
, or plastic (composite materials)
and are rectangular
, square
, or octagonal (a square cover with truncated corners)
in shape.
No colored or gilded covers were found in Lyndhurst, nor were any covers bearing municipal symbols.
Diagonal covers were also found in Lyndhurst - square or rectangular covers composed of two triangles, where opening is done by lifting one of the triangles
.
In general, the design of the covers in Lyndhurst is not unique and follows designs typical of the manufacturer.
The purpose of the cover is usually not indicated, except for drainage covers characterized by drainage slots
, or covers intended for communications bodies (BT)
and control valves (CONTROL VALVE)
.
Manufacturers Covers bearing the manufacturer’s name were made by the British Eccles UK Foundries
, the international PAM
, or the American Carson Industries
.
Standards The common standards are the European standard EN124
and the various load classes (A15 - D400)
, as well as the British Kitemark standard
and the international SGS standard
.