Ekwakhiweni kwensimbi yesimanje, izakhiwo zensimbi ezisebenza ngomshini zichaza amandla nokuqina kwesakhiwo. Njengamanje, kunezinhlobo ezintathu eziyinhloko ezitholakala emakethe yamazwe ngamazwe (ikakhulukazi ngokwezindinganiso ze-ASTM):
Isiteshi se-A36 C:I-A36 uhlobo oluvame kakhulu lwensimbi yesakhiwo sekhabhoni. Njengoba ikwazi ukushibilika kahle futhi ikwazi ukusebenza kahle, i-A36 iyona yokwakha okuvamile lapho amandla aphakathi anele khona futhi intengo ibalulekile njengozimele bensimbi elula, i-chassis ye-trailer kanye nezisekelo zangaphakathi.
Isiteshi se-A572 C:Insimbi enamandla aphezulu ye-Alloy Low (hsla). I-A572 (ikakhulukazi iBanga 50) inamandla okukhiqiza aphezulu uma iqhathaniswa ne-A36 okusho ukuthi ungasebenzisa imithwalo ephezulu ngaphandle kokwandisa isisindo sesakhiwo. Ilungele amabhuloho, izindawo eziphakeme, kanye nemishini esindayo.
Isiteshi se-A992 C:“I-Modern Standard” yezimo ezibanzi nezihlelekile, i-A992 inikeza ibhalansi enhle yamandla aphezulu nokuqina okuhle kanye nokusebenza okungcono kokuzamazama komhlaba. Iqhubeka nokususa i-A572 ezinhlakeni ezinkulu zezakhiwo lapho kubalulekile khona ukuthi ilungu lihlale lizinzile ngenkathi licindezelekile.