I already know OSB is not bad as interior material. Its excellent as sound absorbing material and not bad even looking. I try to consider it if it can be usage as the structure beam. The  reason why, sharing force of the OSB panel is within two to three times high performance compare to normal structure panel. It takes advantage of it to adapt as the Box beam which means surface panel of the beam. The box beam merit, the building weight can be lighter because of the empty inside beam without the frame work. And it can be put the lighting on the side of the beam, since electronic cables of equipment can be inserted in the box.