Page 98 - Water Standards

j oints.Theareaofke y wa yshouldnotbelessthan1 / 3oftotal
crosssectionareaofthebeamandj ointreinforcementma ybe
p rovidedifnecessar y.
12 Draina g eg uttersshallbesetontheto pofrock-bolt
su pp ortedcranebeamanddraina g ep i p esshallbeembeddedin
thebeam.Thedraina g eshallbewellor g anized.
13 Nondestructivetestin gshouldbeconductedfortensile
boltsfortherockboltsu pp ortedcranebeamtocheckthecom-
p actnessofg routin g.
14 S p ecialmonitorin gdesi g nshallbecarriedoutforrock-
boltsu pp ortedcranebeams.Insitutestsshallbep erformedfor
imp ortantorheav ydut yrock-boltsu pp ortedcranebeams.
15 Aftertheexcavationandsu pp ortofp owerhousecav-
erns , calibrationforbrid g ecranerailsshouldbecarriedoutbe-
forethebrid g ecraneliftslar g ep ieces.
7.2.26 Ceilin gshallbep rovidedforunder g roundp owerhouse.
Inthedesi g nofceilin g s ,comp rehensiveconsiderationshallbe
g iventothedemandsofventilation,moisturep roof ,water p roof ,
li g htin ganddecoration.Passa g ewa yforp ersonnelshallbere-
servedontheceilin g s.
7.2.27 Partitionwallsformoisturep roofma ybep rovideda-
roundthep eri p her yoftheunder g roundp owerhouseifnecessar y.
Draina g editchesandoutleteas ytocleanshouldbesetatthebot-
tomofthep artitionwallsandthemoisturep rooftreatmentand
draina g es y stemdesi g ninp owerhouseshallbewelldone.
7.2.28 Thefollowin gstructuralmeasuresma ybetakenforun-
der g roundp owerhousetoimp rovethep erformanceofvibration
p roof :
1 Ri g idl yconnectthefloorsofp owerhousewithventilation
barrelandsidewalltoimp rovetheoverallri g idit y.

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