h30190/hjplus_taiwan_architect_kb/accessible-door-clear-width

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

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