156 / 248
BEAM P
LUS FOR
N
EW
B
UILDINGS
W
ATER
U
SE
(W
U
)
V
ERSION
1.2
W
U
6 E
FFLUENT
D
ISCHARGE TO
F
OUL
S
EWERS
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 135
volume of less than 7.5 litres.
The capacity of the flushing cistern in the case of trough water-closets
and urinals shall be approved by the Water Authority subject to the
discharge in the case of trough water-closets being not less than 9 litres
of water for every metre of the channel and the discharge in the case of
urinals being not less than 4.5 litres of water for every basin or stall, or in
the case of a trough urinal, every metre thereof.
For the purposes of determining the number of persons for whom
sanitary fitments should be provided in shops and department stores the
determination shall be at the rate of 1 person for every 15 square metres
of usable floor area [4].
4
Buildings Department. Practice Note for Authorized Persons, Registered Structural Engineers and Registered
Geotechnical Engineer. PNAP No. APP-6 Shops and Department Stores Building Regulation 5.
http://www.bd.gov.hk/english/documents/pnap/APP/APP006.pdf