Flat karfe yana nufin karfe 12-300 mm fadi da 3-60 mm lokacin farin ciki tare da sashin rectangular da ɗan ƙaramin baki.Flat karfe za a iya gama karfe, kuma za a iya amfani da matsayin welded bututu blank da bakin ciki slab ga laminated sheet.A kauri ne 8 ~ 50mm, nisa ne 150-625mm, da tsawon ne 5-15m, da samfurin ƙayyadaddun span ne m, wanda zai iya saduwa da bukatun masu amfani.Maimakon farantin matsakaici, ana iya haɗa shi kai tsaye ba tare da yankewa ba.