Prefabricated bridge elements/systems are widely used to accelerate the construction and assure the quality; thus, increase service life. Accelerated construction as well as the use of prefabricated elements has many inherent advantages including minimum traffic disruption and increased work zone safety. Yet, the failure of empirically designed field implemented joint details for connecting precast components is a main durability concern. Development of joint details under service loads, to assure monolithic structural behavior without cracks and sealed against water infiltration require fundamental understanding of the joint behavior against design parameters. The common connection details are grouted keyways or butted joints in conjunction with posttension. This study investigates the influence of modular ratio between precast components and grout, and the friction between interfaces on the posttension stress distribution. Regions of uniform compression are identified when multiple posttension strands are employed. Analysis results show that the interface friction is important when butted joints are used between precast components. Further, the use of grout material with known modulus at the time of posttension is vital to assure uniform posttension stress distribution and consequently adequate clamping for durable designs. Finally, deck panel lengths can be designed such that deck joints can attain uniform compression beyond a specific distance from the loaded edges.