FOR NEARLY FOUR DECADES, STEEL MOMENT-RESISTING FRAMES HAVE BEEN CONSIDERED ONE OF THE BEST STRUCTURAL SYSTEMS FOR BUILDINGS IN REGIONS SUSCEPTIBLE TO SEVERE SEISMIC GROUND SHAKING. THEY PROVIDE EXCELLENT COMPATIBILITY BETWEEN THE STRUCTURE AND OPEN ARCHITECTURE OF MOST OFFICE AND RESIDENTIAL BUILDINGS. HOWEVER, EXPERIENCE AND RESEARCH SHOW THAT SEVERE EARTHQUAKES COULD PRODUCE VERY LARGE INTER-STORY DRIFTS IN MOMENT FRAMES. SUCH LARGE DRIFTS COULD RESULT IN SIGNIFICANT DAMAGE TO STRUCTURAL AND ARCHITECTURAL COMPONENTS. AS SUCH, TECHNICAL AND ECONOMICAL CONSIDERATIONS HAVE LED MANY ENGINEERS TO SEEK OUT SIMPLER AND MORE ECONOMICAL SYSTEMS THAT CAN PROVIDE GOOD SEISMIC PERFORMANCE WITH REDUCED INTER-STORY DISPLACEMENTS. RELATIVELY SPEAKING, SEISMIC RETROFITTING OF BUILDINGS IS STILL A NEW ACTIVITY FOR MOST OF STRUCTURAL ENGINEERS. THE RETROFITTING OF A BUILDING REQUIRES AN APPRECIATION FOR THE TECHNICAL, ECONOMIC AND SOCIAL ASPECTS OF THE ISSUE IN HAND. STEEL BRACING IS COMMONLY USED TO INCREASE THE SEISMIC STRENGTH OF FRAMES EITHER FOR REHABILITATION OF STRUCTURES DAMAGED BY AN EARTHQUAKE OR FOR STRENGTHENING OF AN UNDAMAGED STRUCTURE MADE NECESSARY BY REVISIONS IN STRUCTURAL DESIGN OR LOADING CODES OF PRACTICE. CONSIDERING THE EASE OF CONSTRUCTION AND THE RELATIVELY LOW COST, STEEL BRACING APPEARS TO BE ATTRACTIVE COMPARED TO OTHER CONVENTIONAL UPGRADING TECHNIQUES SUCH AS ADDING CONCRETE OR MASONRY SHEAR WALLS OR BASE ISOLATION SYSTEMS. THE BRACING METHODS ADOPTED FALL INTO TWO MAIN CATEGORIES, NAMELY (I) EXTERNAL BRACING AND (II) INTERNAL BRACING. ECCENTRIC BRACING FRAMES (EBFS) IS WIDELY USED IN THE NEW STRUCTURES BECAUSE OF ITS ABILITIES IN OF MAKING OPENINGS IN OUTER FRAMES OF STRUCTURE. INTERNATIONAL STANDARDS LET US TO USE THIS TYPE OF BRACING IN DESIGN AND RETROFITTING OF STRUCTURES. IN THIS PAPER WE HAVE MODELED A NEW TYPE OF ECCENTRIC BRACING SYSTEM WHICH MENTIONED IN AISC LEARNING SLIDES AS A NEW AND UNCONVENTIONAL BRACING SYSTEM. THIS MODEL IS AN EXPOSED BRACING SYSTEM SO IT CAN BE USED FOR RETROFITTING OF AVAILABLE STRUCTURES. THE INTRODUCED BRACING SYSTEM IS SOMETHING LIKE EBF BRACING SYSTEMS BUT THE MODELING AND ANALYSIS OF IT, SHOWN US THAT THE BEHAVIOR IS SOMETHING BETWEEN MOMENT FRAME AND ECCENTRIC BRACING FRAMES. WE HAVE MODELLED A SAME 3-D 6 STORY STRUCTURE IN SOFTWARE AND THEN RETROFIT THE STRUCTURES WITH VARIOUS COMMON AVAILABLE METHODS. THE BEAMS AND COLUMNS ARE SAME AT EACH STRUCTURE SO WE CAN CONNECT THE LATERAL DISPLACEMENT OF STRUCTURES WITH THE STIFFNESS OF THE BRACING SYSTEM. IN THIS PAPER WE HAVE TRIED TO DESCRIBE THIS MODEL OF BRACING AND THEN COMPARE THIS MODEL WITH OTHER COMMON METHODS, BUT IT SEEMS THAT FOR FURTHER STUDIES AND REACH THE MORE EXACT RESULTS WE NEED TO TEST SOME MORE STRUCTURES BY OTHER METHODS OF ANALYSIS LIKE TIME-HISTORY OR PUSHOVER ANALYSIS. SOMETHING IS VERY IMPORTANT TO MENTION IS THAT THE BEHAVIOR FACTOR OF THIS NEW MODEL HAVE TO BE CALCULATED BY OTHER RESEARCHERS THEN WE CAN BE ABLE TO ANALYSIS THIS MODEL BY MORE EXACT INFORMATION. THE RESULTS SHOWN THAT THE SUPPOSED BRACING SYSTEM COULD BE USEFUL FOR THE PURPOSE OF RETROFIT THE STRUCTURE WITH HIGH DUCTILITY AND GOOD RESIST AGAINST THE LATERAL LOADS.