A keystone (or capstone) is the wedge-shaped stone at the apex of a masonry arch or typically round-shaped one at the apex of a vault. In both cases it is the final piece placed during construction and locks all the stones into position, allowing the arch or vault to bear weight.
Which of the following is a structural system in which an overhanging beam or floor is supported at one end?
What century was steel introduced for use in mainstream construction?
Industrially produced iron and steel first began to see widespread use in architecture in the nineteenth century, decreasing overall costs and offering new opportunities to create large-scale and creative building projects.
Which of the following is a Greek architectural order with a scroll like capital?
The Ionic order
The Ionic order Volutes (scroll-like ornaments) characterize the Ionic capital and a base supports the column, unlike the Doric order. The Ionic order developed in Ionia during the mid-sixth century B.C.E. and had been transmitted to mainland Greece by the fifth century B.C.E.
What is the importance of a keystone in an arch?
The keystone is a wedge shape stone. It's the last stone to be placed in the centre of the arch and is the most important stone within the structure. Each stone leans on each other and is locked into place with the centre keystone piece. Without this final piece in position, the arch would collapse.
What is the traditional material for post-and-lintel?
History of lintel systems
In all or most of these traditions, certainly in Greece and India, the earliest versions developed using wood, which were later translated into stone for larger and grander buildings. Timber framing, also using trusses, remains common for smaller buildings such as houses to the modern day.