hi..i install polycarbonate roof a my balcony. it got wall at 1 side.. the polycarbonate beam will attached to that wall since i dont wanna install the support pilar. the width of the balcony is 13ft. i been told that the max width of polycabonate sheet is 2ft .so i will get odd look of beam since the 2nd last beam will be +-1ft form the last beam???