Deformed Bars has TIS 24-2559 standard.

Deformed Bars has TIS 24-2559 standard. TIS describes the technical specifications of manufacturing that DM have indentations on their surface deformations to intensity their bonding with concrete. In order to utilize in construction work which suitable to support structural stability and safety.

Reference:(https://www.conarchy.com/engineering/deformed-steel-bars-definition-and-types/)

Deformed Steel bars TIS 24-2559 Thai industrial Standard
DM bars are steel bars which has feature ridges or deformation that can increase their bond between concrete and steel. DM bars contribute the essential strength, stability and durability to reinforce concrete construction works.   Deformed steel bars are shaped to have good viscosity. It can support structural to not failure when it has under high stress. Deformed bars are manufactured according to TIS 24-2559 Thai industrial Standard.

Advantages:
-Feature deformation enhanced bonding with concrete
-Several use in concrete structures to support strength and stability in construction project
-Diversifies rebar sizes for several application that the diameter from 10 mm-32mm. and the standard lengthen is 10 mm. and 12 mm. In addition, DM standard grade is SD40 and SD 50

Reference: https://www.conarchy.com/engineering/deformed-steel-bars-definition-and-types/