- Columns closer than one footing length (10400) share a 일체기초 whose length is the outer-column distance + 10400, centred between them (spec §4.6). - Pile grid is computed from each footing's length (rows across 8150, pile count along the length from (length − 1400) / 2250 + 1). - Blinding concrete follows each combined footing. Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>