| 摘要 |
PROBLEM TO BE SOLVED: To prevent the damages to jointed part of concrete products. SOLUTION: The joint surface of joint hardware 10 for both or one of concrete products 1 jointed to each other is kept projected over the joint edges of the concrete products 1 and the joint edges of the concrete products 1 are thereby kept free from close contact with each other in a jointed state. As a result, the joint edges are almost free from contact with each other even when more or less irregularities exist on the joint edges, and excessive stress concentration does not take place, thereby preventing the damages to a jointed part.
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