IS 1893-2016 is a code of practice for civil engineers and structure designers. IS-1893-2016 inscribes criteria for earthquake-resistant design of structures.
Other relevant Downloads are below.
SP-16 Design Aids For Reinforced Concrete Structure
IS 456:2000 Plain And Reinforced Concrete-Code of Practice (pdf download)
IS 456:2000 Amendment no.5 July 2019 (pdf)
Download NBC 2016 – Volume 1 & Volume 2 [PDF]