Literally meaning "bay-dividing plank partition" (Kroll 2016), scholars generally agree that jiejian banzhang 截間版帳 is a room dividing partition, and some scholars believe that it is a partition specifically running perpendicular to the main roof ridge (Zhao 2005, 102). The term is only found in Yingzao fashi 營造法式 (1103; Li 2009, 6.6a), and is considered to be a type of xiaomuzuo 小木作 (fine carpentry or joinery). According to the description in the Yingzao fashi, jiejian banzhang is six to ten feet high and is composed of planks or boards (ban 版) and covering strips (yatou hufeng 牙頭護縫), which can be used on both sides of the board. These components are fixed by a board casing (nanzi 難子) between the columns. If the jiejian banzhang is more than seven feet high, column-top-ties (e’fu 額栿) along with posts (tuanzhu 摶柱), and a waist bar (yaochuan 腰串) should be added to the framework. If its width is wider (or deeper) than usual, a bay muntin (qianzhu 槏柱) should also be added.
