Masonry Terminology – Name of an arch built with finely dressed stone blocks An arch constructed using carefully finished, finely dressed stone voussoirs is known as what type of arch?

Introduction / Context:
Different arch types are named for the material and workmanship of their voussoirs (wedge-shaped blocks) and the construction method. Recognizing the correct term is essential for specifications, conservation work, and exam questions about traditional construction.

Given Data / Assumptions:

• The arch is built of stone, not brick.
• Stones are finely dressed (accurately worked surfaces and arrises).
• Voussoirs fit closely with thin joints.

Concept / Approach:
Ashlar refers to carefully dressed stone blocks. An arch formed of such stones is an ashlar arch. In contrast, rubble arches use roughly shaped stones; gauged arches refer to fine-cut bricks; and axed stonework implies a rougher tool finish than ashlar dressing.

Step-by-Step Solution:
Identify the material: stone.Identify the workmanship: finely dressed faces and precise joints.Match the definition: ashlar arch.

Verification / Alternative check:
Historic masonry glossaries define ashlar as stone accurately worked to even faces with thin joints, ideal for neat arches in monumental or façade work.

Why Other Options Are Wrong:

• Rubble arch: uses un-coursed or roughly shaped stones.
• Gauged arch: brickwork where soft bricks are precisely cut to shape.
• Axed arch: implies rougher tooling, not the fine ashlar finish.
• Segmental brick arch: different material (brick) and geometry-based term.

Common Pitfalls:
Equating “gauged” with stone; in architectural usage, gauged commonly qualifies fine brickwork, not ashlar stone.

Final Answer:
Ashlar arch