1) kewayon noman lokaci da shawarar diamita
The nominal diameter of steel bars ranges from 6 to 50mm, and the standard recommended nominal diameters of steel bars are 6, 8, 10, 12, 14, 16, 20, 25, 32, 40, and 50mm.
2) Rashin daidaituwa na siffar fuska da girman ƙwararrun karfe
Ka'idojin ƙirar ƙirar haƙarƙarin haƙoran ƙarfe na ɗakunan ƙarfe zasu cika buƙatun masu zuwa:
Kwangidu β tsakanin riƙewa da gubis na sandunan karfe bai kamata ya zama ƙasa da digiri 45 ba. Lokacin da aka haɗa da kusurwa mafi girma fiye da digiri 70, da shugabanci haƙarƙarin haƙarƙarin haƙƙin haƙƙi a gaban bangarorin karfe ya kamata ya kasance akasin haka;
Da maras muhimmanci spacing l na zartar da ribobi ba zai yuwu sama da sau 0.7 da na diamita na mashaya karfe ba;
The kusurwa α tsakanin gefen haƙarƙƙarfan haƙarƙarin haƙarƙari na ƙwanƙwasa ba zai zama ƙasa da digiri 45 ba;
Jimlar gibba (gami da nisa na haƙarƙarin haƙarƙarin karewa a gefen bangarorin karfe biyu na barayen karfe ba zai wuce kashi 20 cikin 100 na perminal kewaye da karfe mashaya;
Lokacin da nominal diamita na sandunan karfe bai wuce 12mm ba, haƙarƙarin yankin kada ya zama ƙasa da 0.055; Lokacin da diami'in nominal ne 14mm da 16mm, babban yanki na kare bai zama ƙasa da 0.060; Lokacin da diami'in nominal ya fi 16mm, mahaɗan yankin kada ya zama ƙasa da 0.065. Koma cikin Shafi C don lissafin dangi naúrar.
Ribbed Karfe sandunan yawanci suna da haƙarƙarin longittused, amma kuma ba tare da haƙarƙarin da ke nan ba;
3) tsayi da kuma halakar da ake buƙata
A. Tsawon:
Yawancin karfe ana kawo su cikin tsayayyen tsayi, kuma ana nuna takamaiman isar da takamaiman bayarwa a cikin kwangilar;
Ana iya isar da sanduna a cikin cilat, kuma kowane mai siye yakamata ya zama rebeb na, yana ba da 5% na adadin mai jujjuyawa a kowane tsari (mai jujjuya lamba idan ya kunshi biyu. An ƙuntata nauyin diski da diski ta hanyar tattaunawa tsakanin mai siye da mai siye.
B. LITTAFI: haƙuri haƙuri:
Haɗin da aka karɓa na sai ƙayyadaddun sandar karfe lokacin da aka ba da ajali mai tsayi kada ya fi kowace shekara ta 25.
Lokacin da ake buƙatar mafi ƙarancin tsayi, karkacewa shine + 50mm;
Lokacin da ake buƙatar matsakaicin tsayin, karkacewa shine -50mm.
C. Curvature da ƙare:
Endarshen mashin karfe ya kamata a ɗauka kai tsaye, kuma nakasar na gida bai kamata ya shafi amfanin ba.
