Barre a filettatura continua CTB: caratteristiche tecniche
Hot rolled Continuous Threaded Bars: technical details   
In accordo al D.M. n. 8 del 17/01/2018
"Norme tecniche per le costruzioni"
B450C CODE LR20B LR25B LR28B LR32B LR40B
Nominal Diameter  mm 20 25 28 32 40
Steel Grade N/mm˛ 450/540
Load at Yield Min. kN 141 221 277 361 565
Ultimate Load Min. kN 169 265 332 434 678
Agt % ≥ 7,5%
Average section mm˛ 314 490 615 803 1255
Weight kg/m 2,47 3,85 4,83 6,31 9,86
Diameter min/max mm 20/23 25/29 28/32 32/36 40/45