Iri rambi rine chamfered square shaped rine chimiro chakasarudzika icho dhizaini inofemerwa nezvinhu zviri kunze kwenyika zvinobhururuka.Iwo machipisi anopenya akarongedzerwa zvinoenderana nemitemo yakakosha yechimiro, yakasanganiswa neyakajeka anti-corrosion PC chivharo, inoratidzira yakajeka uye yakafanana mwenje.