Reinforcement

[gooseman]

Hello again,
The common term used be engineers is R-20, or T-20 or Y20 to specify reinforcements. One designer used M-15 and M-20. What is the metric conversion and where can I obtain the conversion tables for this imperial terminology?
Thank you again.....

 

[gatorn10ac]

The best I have seen is CRSI (concrete reinforcing steel institute)

 

[BigH]

Are you sure he was referring to reinforcement and not the concrete strength??? In India and probably in other countries (UK???), they use M20 to mean Grade 20MPa concrete. Just a thought - get the terms clarified.