| 摘要 |
PURPOSE: A cap for an anchor bolt is provided to protect an anchor bolt and a nut from corrosion. CONSTITUTION: The cap for an anchor bolt(10) installed to be covered upward to protect a nut(11) fastened to an anchor bolt(10) which is buried under the footing concrete to fix a steel-frame structure comprises: a main cap body(100) composed of a cylindrical lower cap(120) provided with ribs(122) projected inward to be fitted at the contacted state to the outer circumference of the nut(11) and an upper cap pressurizing the lower cap(120) to the bottom by fastening an anchor bolt(10) on the lower cap(120); and a closed unit(200) composed of a primary packing(210) installed between the upper cap and the lower cap(120) and a secondary packing(220) installed on the lower circumference of the lower cap(120) to close up the lower cap(120) and the bottom, and closing up the inside of the main cap body(100) completely.
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