BEAM RETAINING ROTARY PIECE

PROBLEM TO BE SOLVED: To provide a beam retaining rotary piece capable of bonding an end of a strut and an end of an angle brace to a side face part of a wale at an arbitrary angle and sufficiently and safely coping with a great soil pressure acting on the wale.SOLUTION: The beam retaining rotary piece comprises a lower piece 7 attached to the side face part of a wale 2 and an upper piece 8 attached to the end of a strut 3 or the end of angle braces 5 and 6. The lower piece 7 comprises a lower base part 9 including a plurality of bolt holes 11, and a lower beam receiving part 10 projected on an upper surface of the lower base part 9, and including a circular arcuate contact surface part 12 whose center axis is a line in parallel with a direction perpendicular to an axis of the wale 2 at an upper end part. The upper piece 8 comprises an upper base part 17 having a plurality of bolt holes 19, and an upper beam receiving part 18 projected on a lower surface of the upper base part 17, and including a fitting concave part 20 formed in a circular arcuate concave surface shape whose center axis is a line in parallel with the direction perpendicular to the axis of the wale 2 at a lower end part, to which the circular arcuate contact surface part 12 is freely rotatably inscribed and fitted.