Patent ID: 8281534
Filing Date: 2012-10-09
Classification: E04B,E04C

Abstract:
1. A built-up beam fabricated a plurality of profiled steel plates, the beam comprising: a first lower profiled steel plate including a bottom portion, a side-vertical portion bent upwardly and vertically from one lateral edge of the bottom portion, a supporting portion bent horizontally from an upper end of the side-vertical portion, and a first center-vertical portion bent vertically and upwardly from the other lateral edge of the bottom portion; a second lower profiled steel plate arranged symmetrically about the first center-vertical portion of the first lower profiled steel plate and connected to the first lower profiled steel plate, the second lower profiled steel plate having a cross-section symmetrical or asymmetrical to the first lower profiled steel plate; a first upper profiled steel plate including a top face portion and a second center-vertical portion bent vertically and downwardly from one lateral edge of the top face portion, the first upper profiled steel plate being connected to one upper side of the first center-vertical portion of the first lower profiled steel plate; and a second upper profiled steel plate arranged symmetrically about the second center-vertical portion of the first upper profiled steel plate and connected to the other upper side of the first center-vertical portion of the second lower profiled steel plate, the second upper profiled steel plate having a cross-section symmetrical or asymmetrical to the first upper profiled steel plate, thereby enabling a slab to be placed within the depth to reduce the story height, wherein the first center-vertical portions and the second center-vertical portions are connected to each other by bolts to form an inner web; a height of said inner web extending from the bottom portions of the first and second lower profiled steel plates to the top face portions of the first and second upper profiled steel plates.