IN THIS APPLICATION FACTORED LOAD AND CENTRE TO CENTRE LENGTHS IN BOTH DIRECTION ARE THE INPUTS. K FACTORS ARE THE INPUTS AND DROP DOWN MENU IS AVAILABLE FOR THIS SELECTION. BY THESE INPUTS ALL THE BUTTONS ARE ENABLED IN SEQUENCE .APPLICATION CONTAINS ONLY ONE ACTIVITY. AT THE END OF APPLICATION, IT GENERATE A PDF FILE BY USER DEFINED NAME.IF NEXT BUTTON OR DROPDOWN LIST IS NOT ENABLED AT THE TIME THEN IT INDICATES THAT USER HAVE TO CHANGE CURRENT VALUE AND AFTER THIS REMAINING BUTTON OR SPINNER ARE ENABLE IN SEQUENCE.