| 摘要 |
<p>A fastening fitting for a wooden building can construct a fastening section capable of relieving an impact load and allows a reduction in the cross-sectional area of members such as beams. A fastening fitting (10) provided with a helical ridge (11) formed on the side peripheral surface thereof, an axially extending introduction hole (14) formed at the center of an end surface thereof, and a female screw thread (13) formed on the inner end side of the introduction hole, the diameter of the introduction hole (14) being greater than the outer diameter of the female screw thread (13). When a bolt (21) is inserted into the introduction hole (14), the length of the intermediate section (24) of the bolt (21) inevitably increases. This causes the intermediate section (24) to be likely to elastically or plastically deform when a tensile load acts on the bolt (21), and this allows the intermediate section to absorb an impact load to prevent members from cracking. As a result, the fastening fitting does not come out of position unlike conventional products and the cross sectional areas of the members can be reduced.</p> |
