IS 4091 : 1979 is an Indian Standard for Design and Construction of Foundations for Transmission Line Towers and Poles.
Download IS 4091 : 1979 in pdf with this link
Also Read-
National Building Code of India Volume 1 & 2 Download
IS 13920 2016 (Ductile Design and Detailing of Reinforced Concrete Structures)
SP-16 Design Aid for Reinforced Concrete to IS 456-1978 Download
IS 1343 Code 2012 PDF (Prestressed Concrete Code of Practice)
IS 456-2000 Amendment 4 – PDF Download