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南非土木工程施工标准 R部分 雨洪处置 英文原文节选 20100079 3-18 |
RR3.2 Such requirements in respect of any downpipe shall be deemed to be satisfied
where the internal cross-sectional area of such downpipe is not less than
100 mm2 per 1 m2 of roof plan area served by such downpipe: Provided that such
internal cross-sectional area is not less than 4 400 mm2.
ACCESS TO STORMWATER DRAINS
On any stormwater drain ready means of access shall be installed at such intervals
that no part of such drain, measured along the line of such drain, is more
than 40 m from such means of access.
CONNECTION TO STORMWATER SEWER
Where any stormwater sewer is available in any street or servitude abutting any
site to be provided with stormwater drainage, the owner of such site shall, if
so required by the local authority, at his own cost install one or more stormwater
drains to be connected by the local authority to such stormwater sewer.
USE OF STREET SURFACE DRAINAGE SYSTEM
Where the local authority considers the capacity of any street surface drainage
system to be adequate to accept the discharge of stormwater from any site it
may permit such stormwater so to discharge: Provided that the owner of such
site shall, where so required by the local authority, at his own cost provide one
or more conduits to convey such stormwater to such street surface drainage
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