Shallow-arched masonry roof spans between metal, timber or concrete joists, with ballast fill and overlaid with roofing.

Masonry jack-arch construction (M. Lutman)

Masonry jack-arch construction (M. Lutman)

Masonry jack-arch construction (A. Pomonis)

Masonry jack-arch construction (A. Pomonis)

Brick masonry jack arch construction, Canada (Ojdrovic Engineering)

Brick masonry jack arch construction, Canada (Ojdrovic Engineering)