Gyeokja-bit-sal

This engine recreates Gyeokja-bit-sal, in which 45° diagonal slats are layered over a vertical-and-horizontal grid. The 井-shaped grid and the diagonal lattice meet on one surface, so each grid cell is divided again into four small triangles. As in the Bit-sal engine, cells are always fixed as squares, with vertical, horizontal and diagonal slats all drawn over them.

Slat Composition

Slat direction	Angle	Role
Vertical · horizontal slats	0° / 90°	The same orthogonal base framework as Jeongja-sal
Diagonal slats A · B	45° / 135°	Diagonal slats layered along the square cells' diagonals

Door Tab — Main Parameters

Item	Description
Hinged · Sliding / panels	Hinged 1–2 panels, sliding 1–4, 6 or 8 panels
Frame width / height	Wall opening dimensions (width 100–10,000mm, height 400–5,000mm). The outer panel size is calculated with the frame thickness removed.
Horizontal cells	2–30. As with Bit-sal, this sets the number of square cells across; the vertical count is derived automatically.
Auto-fit frame height	When checked, the frame height is adjusted so the last row meets the bottom rail exactly
Left/right stile · top/bottom rail width	Outer frame width (mm)
Slat width	Base width for all slats, orthogonal and diagonal alike (mm)
Use transom panel	Adds a transom panel zone at the top when checked

Specs Tab — Production Specification

Item	Description
Frame / outer / inner width and height	Automatically calculated measured dimensions
Diagonal spacing	Spacing between the diagonal slats
Slat ink lines	Distance between orthogonal and diagonal slat intersections
Stile groove width	Groove width, calculated as a single value rather than separately for sides and top/bottom

Member List

Ordered as frame members → horizontal and vertical slats → diagonal slats → transom panel (if used) → door frame. That is one group more than Bit-sal, since orthogonal and diagonal slats are each tallied separately. The surface area, weight & volume table further down works the same way as Se-sal — see the Se-sal guide for details.

Finish Tab

Choosing the wood, hardware and colors per part to colour (frame, stile & rail, slat, face) works the same as Se-sal. Pick Face as the part and you can click cells in the drawing to fill just those cells (Paint face color).

Example Uses

• Variations on the aja-sal (亞字窓) patterns of palaces and temples
• Changho for high-end hanok guesthouses
• Partitions for traditional craft exhibition halls