| 摘要 |
PURPOSE: A composite assembly type steel section is provided which enables the steel section to be assembled into various shapes conveniently by improving structure of the steel section, thereby clamping T bolts to the steel section conveniently and obtains superior strength by stabilizing structure of the steel section. CONSTITUTION: In a composite assembly type steel section comprising a passageway(2) formed on one side surface of a rectangular steel section(1) and equipped with passageway ribs(3) projected on the inner side of the steel section(1), and connection holes(4) continuously perforated on the rest three sides of the steel section with being spaced apart from each other in a certain distance, the composite assembly type steel section is characterized in that the connection holes are formed in the same shape as the bolt head so that bolt head(7) of T bolts(6) passes through the connection holes, connection hole ribs(5) projected to the inner side of the steel section are formed on the inner circumferential surface of the connection holes, and a catching projection(8) is formed on a lower part of the bolt head of the T bolts so that the catching projection prevents the T bolts from running idle when clamping a plural steel sections using the T bolts and nuts(10), wherein the catching projection stops rotation of the T bolts in the state that the catching projection is surface contacted with the connection hole ribs when rotating the T bolts to an angle of 90 degrees after inserting the T bolts into the connection holes.
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