Rebar Hrb355 Hrb400 Hrb500 8mm 10mm 12mm 14mm 16mm Baar feeraran

Sharaxaad Gaaban:

Cabbirka:6mm-22mm

Dhererka:6m/9m/12m dhererka caadiga ah

Rebar waa magac caan ah oo loogu talagalay baararka birta ah ee feeraha duuban ee kulul.Darajada birta kulul ee caadiga ah waxay ka kooban tahay HRB iyo dhibicda ugu yar ee wax-soo-saarka fasalka.H, R, iyo B waa xarfaha ugu horreeya ee saddexda kelmadood, Hotrolled, Ribbed, iyo Baars, siday u kala horreeyaan.


Faahfaahinta Alaabta

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kala saarid

Birta feeraha kulul ee duuban waxay u qaybsan tahay saddex darajo: HRB335 (darajada hore waa 20MnSi), fasalka saddexaad HRB400 (darajada hore waa 20MnSiV, 20MnSiNb, 20Mnti), iyo fasalka afar HRB500.
Waxaa jira laba hab oo kala saarid inta badan loo isticmaalo xoojinta baararka:mid waa in loo kala saaraa si waafaqsan qaabka joomatari, midda kalena waa in loo kala saaraa ama loo kala saaraa si waafaqsan qaabka isdhaafka ah ee baararka isdhaafsan iyo kala fogaanshaha baararka.Nooca II. Kala soocidaani waxay inta badan ka tarjumaysaa waxqabadka xajinta ee xoojinta.

Midda labaad waa marka loo eego heerka hawl-qabadka (grade), sida halbeegga fulinta dalkayga, rebarku waa (GB1499.2-2007) siliguna waa 1499.1-2008), rebarkuna waxa loo qaybiyaa 3 sida waafaqsan heerka xoogga (dhibcaha wax-soo-saarka/xoogga adkaysiga).Darajo;Heerka Warshadaha Japan (JI SG3112), baararka birta waxay u qaybsan yihiin 5 qaybood iyadoo loo eegayo sifooyinkooda dhamaystiran;Heerka British Standard (BS4461), dhawr darajo oo imtixaanada waxqabadka birta ayaa sidoo kale la cayimay.Intaa waxaa dheer, baararka birta sidoo kale waxaa lagu kala saari karaa isticmaalka, sida biraha caadiga ah ee shubka la xoojiyay iyo birta kulaylka lagu daaweeyay ee shubka la xoojiyay ee hore loo sii adkeeyay.

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dhinac

1) Dhexroorka magacaaban iyo dhexroorka lagu taliyay
Dhexroorka magaca birta ayaa u dhexeeya 6 ilaa 50mm, iyo heerka lagu taliyey dhexroorka magaca birta waa 6, 8, 10, 12, 14, 16, 20, 25, 32, 40, iyo 50mm.
2) Weecanka la oggol yahay ee qaabka dusha sare iyo cabbirka birta feeraha ah
Mabaadi'da naqshadeynta ee baararka birta ribbed waa inay buuxiyaan shuruudaha soo socda:
Xagasha β ee u dhaxaysa feedhaha udgoon iyo dhidibka birta birta waa inaanu ka yarayn 45 digrii.Marka xagasha ku jirta aysan ka badneyn 70 darajo, jihada baararka isdhaafka ah ee labada dhinac ee birta birta waa inay ka soo horjeedaan;
Fogaanta magaca l ee baararka isdhaafka ah waa in aanay ka badnayn 0.7 jeer dhexroorka magacaaban ee baararka;
Xagasha α ee u dhaxaysa dhinaca feeraha leexsan iyo dusha sare ee birta birta waa inuusan ka yarayn 45 darajo;
Wadarta daldaloolada (oo ay ku jiraan ballaca feeraha dhaadheer) ee darafyada feeraha leexsan ee labada dhinac ee birta ku xiga waa in aanay ka badnaan 20% wareegga magaca birta;
Marka dhexroorka magaca birta uusan ka badneyn 12mm, aagga feeraha qaraabo waa inuusan ka yarayn 0.055;marka dhexroorka magacu yahay 14mm iyo 16mm, aagga feeraha qaraabo waa inuusan ka yarayn 0.060;marka dhexroorka magacu uu ka weyn yahay 16mm, aagga feeraha qaraabo waa inuusan ka yarayn 0.065.Fiiri Lifaaqa C si aad u xisaabiso aagga feeraha qaraabada.
Biraha birta jeexjeexan guud ahaan waxay leeyihiin baararka dhaadheer, sidoo kale waxaa jira kuwa aan lahayn baararka dhaadheer;

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3) Dhererka iyo leexashada la oggol yahay
Mid.dhererka
Biraha birta ah waxaa badanaa lagu bixiyaa dherer go'an, dhererka gaarsiinta gaarka ah waa in lagu tilmaamaa qandaraaska;
Biraha birta ah waxaa lagu geyn karaa duub, duub kastaa waa inuu ahaadaa hal bir, 5% tirada duubka dufcaddiiba (wax ka yar laba duub waa laba duub) waxay ka kooban tahay laba bir.Miisaanka saxanka iyo dhexroorka saxanka waxaa lagu go'aamiyaa gorgortan dhex mara alaab-qeybiyaha iyo iibsadaha.
b.Dulqaadka dhererka
Marka dhererka go'an la keeno, leexinta la oggol yahay ee dhererka birta birta ah kama badna ± 25mm;
Marka dhererka ugu yar loo baahan yahay, leexashadu waa + 50mm;
Marka dhererka ugu badan loo baahan yahay, leexashadu waa -50mm.
c.Curvature iyo dhamaadka
Dhamaadka birta birta ah waa in si toos ah loo gooyaa, iyo qallafsanaanta maxalliga ah ma saameyn doonto isticmaalka

bandhig sawir

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