Bending loading test and push-off loading test are carried out to know the mechanical properties of the repair method due to the concrete coverage. Though loading tests, ultimate strength, crack development, deformation and so on of speciments are investigated. As a result of the loading tests, ultimate strength of the specimens related to collapse pattern is dominated by not only bending moment but shear force considered arch mechanism. Breaking of studs are not observed at the bending laoding test when No. of studs is decided by procedure presented in this paper. Ultimate strength, c by formulae due to limit state desing method through
comparison between test results and calcualation ones.