| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to perform, for example, reduction in the amount of concrete used for a footing beam.SOLUTION: Performing setting so that a footing beam 3's lower end (or footing beam lower end) 3a's width Win the shorter direction y is larger than the footing beam lower end 3a's upper part (or footing beam center part) 3b, 3b's width Win the shorter direction y makes it possible to reduce the use amount of concrete as compared with the case in which the footing beam's cross section is approximately rectangular. Capability of expanding the footing beam 3's main beam reinforcement E's separation interval (or an interval between one main beam reinforcement E and another main beam reinforcement E) reduces a risk of interference between a pile main reinforcement D and the main beam reinforcement E, making installation work for the footing beam 3 be efficient.SELECTED DRAWING: Figure 1 |
