On the other hand, in the case of uguisubari, as the floorboard is wide, both ends of the board are curved upward a little and further, holes of the clamp nailed to the board are designed to have a clearance in a degree to allow the floorboard to move up and down when the floorboard is not curved.
しかし鶯張りのばあいは、床板の幅が広いから両側が多少、上方に反曲し、かつ、板に打ち込まれた手違いかすがいの穴が、床板の反曲しないばあいにも対応し得るだけに上下に余裕を持たせてある。