A passage in "Engishiki" (codes and procedures on national rites and prayers) says, 'Floor boards of Uji-bashi: 10 from Omi Province, eight from Tanba Province; nine meters long, 39 centimeters wide, and 24 centimeters thick.'
『延喜式』には、「宇治橋ノ敷板、近江国十枚、丹波国八枚、長サ各三丈、弘サ一尺三寸、厚サ八寸」とある。