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  2. Flagstone - Wikipedia

    en.wikipedia.org/wiki/Flagstone

    Flagstone (flag) is a generic flat stone, sometimes cut in regular rectangular or square shape and usually used for paving slabs or walkways, patios, flooring, fences and roofing. It may be used for memorials, headstones , facades and other construction.

  3. Jack arch - Wikipedia

    en.wikipedia.org/wiki/Jack_arch

    Unlike lintels, which are subject to bending stress, jack arches are composed of individual masonry elements cut or formed into a wedge shape that efficiently uses the compressive strength of the masonry in the same manner as a regular arch. Like regular arches, jack arches require a mass of masonry to either side to absorb the considerable ...

  4. Arizona flagstone - Wikipedia

    en.wikipedia.org/wiki/Arizona_flagstone

    Arizona flagstone is composed of rounded grains of quartz which are cemented by silica. Other minerals are present, mostly as thin seams of clay, mica , secondary calcite , and gypsum . Arizona flagstone is mainly quarried from the Coconino and Prescott National Forests .

  5. List of largest monoliths - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_monoliths

    Monolith with bull, fox, and crane in low relief at Göbekli Tepe. The density of most stone is between 2 and 3 tons per cubic meter. Basalt weighs about 2.8 to 3.0 tons per cubic meter; granite averages about 2.75 metric tons per cubic meter; limestone, 2.7 metric tons per cubic meter; sandstone or marble, 2.5 tons per cubic meter.

  6. Masonry - Wikipedia

    en.wikipedia.org/wiki/Masonry

    A mason laying a brick on top of the mortar Bridge over the Isábena river in the Monastery of Santa María de Obarra, masonry construction with stones. Masonry is the craft of building a structure with brick, stone, or similar material, including mortar plastering which are often laid in, bound, and pasted together by mortar.

  7. Poulnabrone dolmen - Wikipedia

    en.wikipedia.org/wiki/Poulnabrone_dolmen

    View from the south-side, with a portal stone at the right (east-facing side) Poulnabrone dolmen consists of a slab-like tabular capstone (or table-stone) supported by two pillar stones on either side which create a chamber that tapers eastwards. Two portal stones at its lower end mark the tomb's entrance. [6]

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