This IS code is stipulated for Improving Earthquake Resistance of Earthen Building Guidelines.
Download IS 13827:1993 PDF Here
You may wish to download the following PDFs:
IS 456 2000 [Indian Standard Plain and Reinforced Concrete] PDF
IS 13920 2016 [Latest][Ductile design and detailing of reinforced concrete structures]
IS 16700 – 2023 Criteria for Structural Safety of Tall Concrete Buildings
IS 456 2000 Plain And Reinforced Concrete-Code of Practice (pdf)
Download NBC 2016 – Volume 1 & Volume 2 [PDF]