Steel reinforcement wakilci muhimmin component na gini a cikin ayyukan kasa na kasa da na geotechnical, haɗaɗaukar ƙarfin tensile tare da ƙarfin ƙarfi don jure wa matsanancin matsala da aka samu a cikin gini na ƙasa. Anayansa daga carbon steel tare da ƙarancin alloy content, steel reinforcement bars—wanda aka fi sani da rebar—anayatsa ta hanyar hot-rolling processes wanda yake haifar da surface deformations na musamman da aka tsara don ba da mechanical bond tare da concrete matrices. Kayan yake ƙunshi 0.15–0.40% carbon by weight, tare da manganese da silicon content da aka tsara don samun ƙarfin yield strengths wanda yake kare weldability da ductility don aikin gini a cikin ayyuka na ƙalubale.
Steel rebar (reinforcing steel bar) shine ɓangaren tensile reinforcement da ake amfani da shi a cikin concrete structures da aka ƙarfafa a cikin ayyukan kafa na zurfi, piling, da injiniyan kasa. Steel rebar ɗin ya ƙunshi hot-rolled carbon steel bars da deformed ribbed surface profile da ke haɓaka mechanical adhesion da bond strength da concrete. Kayan ake samu a cikin diameters daban-daban (kamar 6mm zuwa 50mm) da aka ƙera a ƙarƙashin strict compositional controls don ba da yield strength, ductility, da corrosion resistance da suka dace da muhallin ƙarƙashin ƙasa mai ƙarfi.
Gungun ƙarfe, wanda kuma ake waƙa da suna gungun ƙarfe mai ƙarfi ko gungun ƙarfe mai ƙarfi, sune tarin gini na gini wanda aka gina su daga ƙarfe mai ƙarfi (rebars) da aka haɗa su tare da waya don kafa tsarin maraɓa, maraɓa, uku. Waɗannan gungun anayensu don bayar da ƙarfin ƙarfi a cikin bututun da aka haƙo, caissons, da piles, inda suke ƙarƙashin ƙarfin jujjuyawar ƙarfi da kuma yada ƙarfin ƙarfi a ko'ina cikin ɓangaren gini na ƙarfe. Kayan ya ɗanɗana yawanci suna ƙunsa Grade 60 (420 MPa) ko Grade 75 (500 MPa) deformed steel rebars an tsara su a cikin tsarin zagaye, murabba'i, ko ayyuka masu tsawo, tare da ƙarfin ƙarfi na tsawo suna bayar da ƙarfin ƙarfi na farko da spiral ko tie wires suna tabbatar da ƙarfin gungun a lokacin gina shi da ƙarfe.