By name: accessible-door-clear-width description: "This skill should be used when checking accessible-route door/opening clear-width compliance for buildings in Taiwan, and avoiding the gap between the code's nominal frame-to-frame distance and the effective passable clear width after the door leaf, hardware and finishes intrude. Covers Taiwan Accessible Facilities Design Specification §205.2.3 (entrances/doors): hinged-door frame-to-frame distance ≥ 90 cm, sliding/folding-door clear width ≥ 80 cm, no thresholds, and the §205.4.1 ban on revolving/spring doors." user-invocable: true
Accessible Door Clear Width Pitfalls (無障礙出入口門淨寬實務陷阱)
Overview
The code measures the frame-to-frame distance; a person passes through the effective clear width after the door opens. The difference is consumed by the door leaf, hardware and finishing layers. Invoke this skill when:
- Sizing door openings on an accessible route
- Deciding whether to reserve width for door-leaf intrusion and finishes
- Self-checking before accessible-facility completion inspection
Core Principle: Nominal Opening ≠ Effective Passable Clear Width
The provision measures the frame-to-frame distance (hinged door ≥ 90 cm), but the usable dimension is the effective clear width with the door open 90° (inner face of the open leaf to the opposite frame). The difference:
nominal frame-to-frame distance − door-leaf/hardware intrusion (at 90°) − two-side finishing = effective passable clear width
The threshold is "≥", so an opening drawn exactly at 90 cm almost certainly fails after the leaf and finishes are installed.
Pitfall Card: Accessible Door Clear Width — Effective-Clear-Width Trap
| Field | Value |
|---|---|
| Regulatory basis | Taiwan Accessible Facilities Design Specification §205.2.3 (entrances/doors); revolving/spring doors banned (§205.4.1) |
| Threshold | Hinged door: frame-to-frame distance ≥ 90 cm; sliding/folding door: clear width after opening ≥ 80 cm. Floor flush, no threshold |
| Measurement nuance | Code text measures "frame-to-frame distance"; practice/inspection commonly judges by effective clear width (door open 90°, inner leaf face to opposite frame). Leaf thickness, stops, handles and finishes all erode it |
| Gap mechanism | nominal frame-to-frame − leaf/hardware intrusion − two-side finishing = effective passable clear width (forfeits compliance below 90 cm) |
| Drawing countermeasure | Draw the opening at 100 cm, reserving for leaf intrusion and finishing, so effective clear width stays ≥ 90 cm |
| Failure consequence | effective clear width < 90 cm → accessible-facility inspection fails → use permit blocked |
| Failure timing | Surfaces after the door and finishes are installed; hard to remediate (requires changing door type or rebuilding the frame) |
| Linked items | accessible-route clear width along the whole path, interior fit-out, use-permit completion inspection |
| Severity | 🔴 High (directly blocks the use permit; a late-stage, post-completion risk) |
Mnemonic: the 90 cm must be measurable after the door is hung and finishes applied; draw 100 cm so the leaf and cladding are given away up front.
Design Checks
- Hinged-door opening reserves leaf intrusion + finishing (frame-to-frame ≈95–100 cm so effective ≥ 90 cm)?
- No revolving/spring doors (§205.4.1)?
- Floor flush, no threshold?
- Sliding/folding door clear width ≥ 80 cm after opening?
- Handle leaves 4–6 cm anti-pinch space (§205.4.3)?
To Verify
- The "effective clear width judged at 90° open" is a practice/inspection convention; the code text states "frame-to-frame distance". Confirm against local-government inspection interpretations.
References
- Taiwan Accessible Facilities Design Specification §205 (entrances/doors) — Ministry of the Interior regulation system
- Local-government use-permit accessible-facility inspection rules