Surface boxes, guards and underground chambers for the purposes of utilities - Specification for surface boxes
Surface boxes, guards and underground chambers for the purposes of utilities - Specification for surface boxes
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1 Scope This part of BS 5834 specifies requirements for surface boxes to be used with guards and underground chambers designed for the purposes of utilities including those intended for factory infill having a maximum designated overall clear opening of 450 mm × 450 mm. This British Standard specifies surface boxes made from cast iron, cast aluminium, plastics and fabricated steel. The selection, use and surface finish of infill materials for factory infilled covers is outside the scope of this standard. A test method for loading tests is specified in Annex A and a summary of the optional items to be agreed between the manufacturer and the purchaser is given in Annex B.
NOTE 1 See Table 4 for permitted intrusions to the clear opening .
NOTE 2 Requirements for covers having a larger clear opening than 450 mm x 450 mm are specified in BS EN 124. In BS EN 124, such covers are referred to as gully or manhole tops.
Упомянутые в описании и другие стандарты BS