JOINT PLATE WITH GROOVE, AND STEEL MATERIAL JOINT STRUCTURE

To provide a joint plate with grooves capable of obtaining high slide coefficient even in joining steel materials having a coating film with each other, and a steel material joint structure using the same.SOLUTION: Tips of protrusions 13 are made to bite a web by sandwiching a joint plate 100 with grooves from both surfaces of the web and fastening the same with a high strength bolt 101. Even though a tensile force is generated in a joint portion of H-shaped steels 200 with each other, the joint plate 100 with grooves is hard to slide from the H-shaped steel 200, and the H-shaped steels 200 are securely joined to each other. Especially, a coating film 201 is formed on a surface of the H-shaped steel 200 used outdoors. Here, a height H1 of the protrusion 13 is higher than a thickness F of the coating film 201 (the height of the protrusion 13 is described later). Thus, the protrusion 13 can be made to penetrate the coating film 201 and the tips of the protrusions 13 can be made to bite the surface of the H-shaped steel 200.SELECTED DRAWING: Figure 2 【課題】 被膜を有する鋼材同士の接合であっても、高いすべり係数が得られる溝付接合板と、これを用いた鋼材接合構造を提供する。【解決手段】 溝付接合板１００をウェブの両面から挟み込んで高力ボルト１０１を締め込むことで、突部１３の先端をウェブに食い込ませ、これにより、Ｈ形鋼２００同士の接合部に引張力が生じても、溝付接合板１００とＨ形鋼２００とのすべりが生じにくく、確実にＨ形鋼２００同士を接合することができる。ここで、特に屋外で使用されるＨ形鋼２００の表面には、被膜２０１が形成される。ここで、突部１３の高さＨ１（突部１３の高さについては後述する）は、被膜２０１の厚さＦよりも高い。このため、突部１３を被膜２０１に貫通させて、突部２０１の先端をＨ形鋼２００の表面に食い込ませることができる。【選択図】図２