PURPOSE: To form an opening having a large bore without scaling up a beam by dividing a gauge H steel beam into two by a corrugated kerf shaped to a web and mutually abutting and bonding the corrugated crest sections of both beam sections.
CONSTITUTION: A reference line 10d is formed in the longitudinal direction of the web 10b of a gauge H steel beam 10 composed of the web 10b and a pair of flanges 10a, 10a. Corrugated kerfs 10c at an angle specified at 45° to the reference line 10d are shaped extending over the upper and lower sections of the reference line 10d in the web 10b. The beam 10 is divided into two by the kerfs 10c, and two beam members 10A, 10B to which waveforms corresponding to the waveform of the kerfs 10c are shaped are formed to the edges of the web. The crest sections of the waveforms of both beam members 10A, 10B are abutted and bonded mutually, thus constituting the gauge H steel beam 10 with a large number of openings. Corrugated rib bodies consisting of ribs approximately rectangular to the web are formed to the sections of the waveforms of the edges of at least one beam members 10A, 10B.
OTA MICHIHIKO
AOYAMA SHINSUKE
MURATA KOJI
NAKAYAMA NOBUO
KIMURA MAMORU
KANEKO HIROFUMI
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