Ternary blended concrete is a mixture of three different cementitious materials. To create a sustainable environment cement is replaced with Secondary Cementitious Materials. This paper deals with the usage of SCMs such as RHA and GGBS in the replacement of cement. The strength characteristics of ternary blended concrete beam with Ground Granualted Blast Furnace Slag (GGBS) and Rice Husk Ash (RHA) by replacing the ordinary Portland cement by 0%, 10%, 20%, 30%. Flexural strength of concrete beam is done after 28 days of curing using loading frame. OPC-RHA-GGBS ternary cement concrete could be used as lightweight concrete in civil engineering and building works. The observations were critically analyzed and the different attributes of the various mixes were correlated with the RHA content in the mix.