Abstract
This paper presents the results of loading tests regarding RBS moment connection with staggered hole alignment developed for use in rehabilitation and upgrading of existing non ductile moment frames. Major findings obtained from loading tests are as follows: 1) fractures initiated from the toe of a weld access hole is prevented; 2) method to evaluate the flexural strength of RBS with staggered hole alignment on the bottom flange are suggested and its varidity is confirmed.
