In reinforced concrete construction, two types of rebar are commonly used: plain rebar (BjTP) and deformed/ribbed rebar (BjTS). Choosing the right type determines the strength and safety of your building structure. **Plain Rebar (BjTP)** Smooth surface with a round, even cross-section. Under SNI 2052:2024, plain rebar is commonly available in grade BjTP 280. Easy to bend, suitable for: stirrups/ties (binding rings for columns and beams), distribution reinforcement in slabs, and light construction. **Deformed/Ribbed Rebar (BjTS)** Its surface has transverse ribs that create much stronger bonding with concrete. Available in grades BjTS 420 up to BjTS 550. Used for: main reinforcement in columns, beams, and foundations; multi-story buildings, bridges, and infrastructure. **Quick Comparison** - Surface: smooth vs ribbed - Concrete bonding: standard vs very strong - Grade: BjTP 280 vs BjTS 420/550 - Use: stirrups & distribution bars vs main structural reinforcement **Make Sure Both Are SNI-Certified** Whichever type you choose, make sure your rebar meets SNI 2052:2024 — actual diameter matching the label, no reduced weight, tested steel quality. Inter World Steel produces both, SNI-certified, direct from our factory in Tangerang. Contact our team for a consultation on your project needs.