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The system is dense with fenestration jargon. This glossary gives each term its general
industry meaning so the rest of the manual reads cleanly.
The product — a window or door
A manufactured unit is modelled as a hierarchy, top to bottom:
| Term | Meaning |
|---|---|
| Unit / Overall | One complete manufactured window or door assembly — the root of a unit’s geometry. Contains one or more facets. |
| Facet | A major design face/section of a unit (e.g. Front, Side). A simple window has one facet; a bay/bow or corner unit has several. |
| Frame | The fixed outer perimeter everything mounts into: Head (top), Sill (bottom), and the two Jambs (verticals). |
| Opening | A hole within a frame, filled by a sash, fixed glass, or further subdivided by mullions. |
| Mullion | A structural bar dividing a frame/opening into multiple openings. Vertical (V) and horizontal (H) mullions follow separate code paths. |
| Coupler | A joining member that couples separate units/openings together. In this app a coupler splits a facet into equal openings. |
| Transom | A horizontal divider/opening above a door or main window. |
| Sash | The framed (often operable) assembly holding the glass inside an opening. A sash leaf is one individual panel; multiple leaves = e.g. a French door. |
| Operation type | How a sash moves: Casement (side-hinged), Awning (top-hinged), Hopper (bottom-hinged), Slider/Glider (horizontal), Single/Double Hung (vertical), Fixed (non-operating). |
| DLO — Daylight Opening | The visible glazed area: the hole light passes through, measured to the inside edge of the glazing bead. |
| Glazing bead | The trim strip retaining the glass; its inner edge defines the DLO. |
| Glass / Lite | A glazed pane/area. “Divided lites” = glass split into multiple visual panes by grids. |
| Sealed Unit (SU) / IGU | Insulated Glass Unit: two or more panes bonded around a spacer with a sealed gas gap. |
| Spacer | The perimeter bar between panes of a sealed unit; its size drives grid cut sizes. |
| Grid / Muntin / Bar | Decorative bars dividing the glass into smaller lights (true-divided, between-glass, or applied). |
| SUH — Sealed-Unit Height | A setback measured down from the top edge of the glass. On a grid template it is a setup value that starts the grid pattern below the sealed-unit top line (see Grids & the SUH setback); as a per-item value it is the top-mullion setback computed for each glass unit and sent to glass suppliers. |
| Series | A product line / extrusion profile system. Pricing and part-selection rules are per series. |
| Profile | An extruded cross-section member (frame/sash/mullion stock). |
| BOM — Bill of Materials | The parts and cut pieces to manufacture the unit. |
| Cut list / CLF | Manufacturing cut output: each profile piece’s length, miter/cut angles, and saw feed direction. |
| Design Pressure (DP) / Wind load | The structural rating a unit must meet for a location (wind-resistance lookups by city). |
The business
- Partner / Supplier / Tenant — a customer company using the system. OpenJanela is multi-tenant: each partner has its own database, resolved at runtime.
- Order / Job / Line item — an order contains line items; each line item is one configured unit.
Units of measure (important)
Internal dimensions are stored as integers, not decimals:
- Imperial = 64ths of an inch.
- Metric = millimetres × 100 (hundredths of a millimetre).
A raw dimension value is therefore not “the number the user typed” — it is converted at the
edges of the system. This convention recurs throughout the Notching chapter.