HAT-SHAPED STEEL SHEET PILE

A hat-shaped steel sheet piling 1 that extends in a longitudinal direction and that constitutes a wall by a plurality of same being disposed wherein: the relationship per 1 m length in the width direction of the hat-shaped steel sheet piling 1 between the cross-sectional area A (cm2/m) and the cross-sectional second moment of area I (cm4/m) about a cross section center of gravity line M extending in the width direction in the plan view seen from the longitudinal direction of the hat-shaped steel sheet piling 1 satisfies formula (1); and formula (2A) and formula (2B), formula (3A) and formula (3B), formula (4A) and formula (4B), or formula (5A) and formula (5B) are satisfied with D1 (mm) as the distance between the cross section center of gravity line M and a first intersection point P1 of extension lines for each of a pair of flanges 11 on the plan view, and D2 (mm) as the distance between second intersection points P2 where the cross section center of gravity line M intersects each of the pair of flanges 11. (1): A [ 0.00252I + 94.4 (2A): 262.6 [ D1 [ 281.0 (3A): 496.9 [ D1 [ 520.9 (4A): 621.5 [ D1 [ 650.9 (5A): 625.2 [ D1 [ 654.8 (2B): 484.0 [ D2 [ 499.0 (3B): 474.0 [ D2 [ 489.0 (4B): 476.0 [ D2 [ 491.0 (5B): 474.0 [ D2 [ 489.0