Maitiro eCSP, anozivikanwawo sekuti compact tropical production line, ari kupisa akakungurutswa uye akagadzirwa nekambani yeGerman Sloman – Siemag (SMS) muna 1982. Yakazosimwa kune chirimwa cheNucor Crawfordville kuUnited States uye chakashandurwa mune zvehunyanzvi. 1989. Yekutanga CSP inoenderera mberi kukanda nekukungurutsa maitiro yakapedzwa. CSP maitiro: kushandura kana vira remagetsi → ladle yekunatsa choto → yakatetepa slab inoenderera mberi yekukandira muchina → inonyura muchoto kuchengetedza kupisa → inopisa inokungurutsa mill → laminar kutonhora → pevhu coiling.