5. T.Chhay NPIC
b. kMras;Gb,brmaénkMralxNÐmYyTisEdleRbIEdk 400MPa Gnuelamtam ACI Code, Table 9.5a
sMrab;kMralxN½Ðtan;mYyTis nigsMrab;kMralxNÐrnUtmYyTisKYresμInwgtMéldUcxageRkam³
- sMrab;TMrsamBaس kMralxNÐtan; (solid slab)/ h = L / 20 ¬kMralxNÐrnUt (ribbed slab),
h = L / 16 ¦
- sMrab;kMralxNÐEdlCab;mçag³ kMralxNÐtan;/ h = L / 24 ¬kMralxNÐrnUt , h = L / 18.5 ¦
- sMrab;kMralxNÐEdlCab;sgçag³ kMralxNÐtan; / h = L / 28 ¬kMralxNÐrnUt , h = L / 21 ¦
- sMrab;kMralxNÐ cantilever: kMralxNÐtan; / h = L / 10 ¬kMralxNÐrnUt , h = L / 8 ¦
- sMrab; f y xusBI 400 MPa enaHtMélTaMgGs;xagelIRtUvKuNnwg 0.4 + 1.5 ⋅ 10 −3 f y Edl f y Kit
Ca MPa . kMras;Gb,brmaenHRtUv)aneRbITal;EtkarKNnaPaBdabbgðajfakMras;tUcCagenHGac
eRbIedayKμanplb:HBal;Rtlb;mkvij.
c. eKRtUvepÞógpÞat;PaBdabenAeBlTMrkMralxNÐEdlP¢ab;eTAnwgsMNg;TMngCargeRKaHfñak;xøaMgedayPaB
dabFM. PaBdabkMNt;RtUv)ankMNt;eday ACI Code, Table 9.5b .
d. eKcUlcitþeRCIserIskMras;kMralxNÐedaytMeLIg b¤bnßymþg 10mm .
e. eKRtUvepÞógpÞat;kMlaMgkat;TTwg ebIeTaHbIvaminmantMélFMk¾eday.
f. kMras;ebtugkarBarEdk (concrete cover) enAkñúgkMralxNÐebtugminRtUvtUcCag 20mm sMrab;épÞkM
ralxNÐEdlRbQmnwgkarsik b¤b:HpÞal;nwgdI. kñúgkrNIenH d = h − 20mm − d b / 2 eyagtamrUbTI
9>1 d .
g. sMrab;eRKagkMralxNÐEdlmankMras;esμI enaHbrimaNEdkGb,brmaenAkñúgTisedArbs;kMralxNÐminRtUv
tUcCagbrimaNEdktMrUvkarsMrab;karrYmmaD nigTb;nwgsItuNðPaB (shrinkage and temperature
reinforcement) eT (ACI Code, Section 7.12).
h. EdkemminRtUvmanKMlatFMCagkMras;kMralxNÐbIdg 3h b¤FMCag 450mm eLIy (ACI Code, Section
7.6.5).
i. eKRtUveRbIRbBnæ½EdkRtg;TaMgenAEpñkxagelI nigEpñkxageRkamrbs;kMralxNÐCab;. eBlxøHeKk¾GaceRbI
RbBnæ½EdkcMruH ¬EdkRtg; nigEdkBt;¦pgEdr.
j. bEnßmBIelIEdkem eKk¾RtUvdak;EdkEdlEkgnwgEdkemEdr. EdkbEnßmenHeKehAfa Edkrg (secondary,
distribution) EdkrYmmaD b¤EdksItuNðPaB (shrinkage or temperature reinforcement).
kMralxNÐmYyTis 177