... steel C-beams: Standard: AISI, ASTM, BS, DIN, GB, JIS Grade: Q235B,SS400,S235JR Application: Frame Part Standard: ... AISI, ASTM, BS, DIN, GB, JISGrade: Q235B,SS400,S235JRPlace of Origin: Tianjin China ( ... daysSpecifications1.Easy installation 2.Good anti-bending performance 3.Good straightness 4.Excellent authenticity performance Packaging & Delivery Packaging Detail: ...