| 摘要 |
PROBLEM TO BE SOLVED: To provide a precast block or the like which avoids interference with work at a single side of a structure, and can shorten a construction period.SOLUTION: A precast block 10 comprises a main body 11, and a plate 14 or the like which protrudes from the main body 11, and functions as a mold frame for a filler at seam formation. Vertical and left-and-right edges of the plate 14 protrude from the main body 11. Shapes of four points in left upper, right upper, left lower, and right lower at which the edges cross one another are defined so that two substantially-same rectangular regions can be created when matching notched portions 140 which are obtained by notching corners of a right angle to one another. Furthermore, since the plate 14 is fixed to the edge of the plate 14 in a different block 10 in a state that the plates are overlapped on each other in a fore-and-aft direction, a hole 15 can be formed, and a bolt 16 can be arranged. |
