Radiography is used in wide range of application including medicine, engineering, forensic, security, etc. In NDT, radiography is one of the most wide used fields. Radiography Testing Method (RT) provides serious no. of advantages were used to find hidden flaws by the ability of short wavelength to penetrate materials. The Intensity of radiation is either captured by Film Radiography or in Real time Radiography. The radioactive sources Ir-192, Co-60 or in rare use of Cs-137. For Safety

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... Concrete and Steel and Lead is used to reduce the intensity of radiation and Exposure to the Radiographer. The concept of Tenth and Half value layer thickness is widely used in shielding. In thisstudy, Experimental Reading is compared with Theoretical one using TVL and HVL thickness is calculated for steel and concrete. In which Radiation is used, were determined from measurements, using collimated beam of gamma rays from an Iridium-192.