Beam ေတြမွာ Concrete cover ကိုဘယ္ကယူမလဲ.......

ဒါေလးတခု မွားတဲ့သူေတြ မွားေနၾကပါတယ္။ အယူအဆအလြဲမ်ားထဲေတာ့ မထည့္ေတာ့ပါဘူး။ Beam ေတြမွာ clear cover ကို 1.5" ထားၾကပါတယ္။ ဒါကို တခ်ိဳ႕က Main bars ကေနယူေနၾကပါတယ္။ အမွန္ကေတာ့ Beam ဆို Stirrups နယ္ကုန္က ယူရမွာပါ။
ACI 318-08, Section 7.7.1 မွာဒီလိုေဖာ္ျပထားပါတယ္။
For Cast-in-place concrete (nonprestressed)
Where concrete cover is
prescribed for a class of structural members, it is measured
to the outer edge of stirrups, ties, or spirals if transverse
reinforcement encloses main bars; to the outermost layer of
bars if more than one layer is used without stirrups or ties;
or to the metal end fitting or duct on post-tensioned
prestressing steel; or to the outermost part of the head on
headed bars.
(ဗိုလ္ဗိုလ္ေက်ာ္)