A corbel arch (or corbeled / corbelled arch) is an arch-like construction method that uses the architectural technique of corbeling to span a space or void in a structure, such as an entranceway in a wall or as the span of a bridge. A corbel vault uses this technique to support the superstructure of a building's roof.
A corbel arch is constructed by offsetting successive horizontal courses of stone (or brick) beginning at the springline of the walls (the point at which the walls break off from verticality to form an arc toward the apex at the archway's center) so that they project towards the archway's center from each supporting side, until the courses meet at the apex of the archway (often the last gap is bridged with a flat stone). For a corbeled vault covering, the technique is extended in three dimensions along the lengths of two opposing walls.
Although an improvement in load-bearing efficiency over the post and lintel design, corbeled arches are not entirely self-supporting structures, and the corbeled arch is sometimes termed a false arch for this reason. Different from "true" arches, "false" or corbelled arches are built of horizontally laid stones or bricks, not of wedge-shaped voussoirs converging towards, and being held together by a central keystone. Unlike "true" arches, not all of the structure's tensile stresses caused by the weight of the superstructure are transformed into compressive stresses.
Corbel arches and vaults require significantly thickened walls and an abutment of other stone or fill to counteract the effects of gravity, which otherwise would tend to collapse each side of the archway inwards.[ citation needed ]
Some arches use a stepped style, keeping the block faces rectangular, while other form or select them to give the arch smooth edges, usually with a pointed shape.
Corbelling is a technique first applied by the ancient Egyptians and Chaldeans. [1]
The Newgrange passage tomb, built sometime between 3200 and 2500 BC during the Neolithic period, has an intact corbel arch (vault) supporting the roof of the main chamber.[ citation needed ]
The medieval buildings of the monastery at Skellig Michael are also constructed using this method.[ citation needed ]
During the Fourth Dynasty reign of Pharaoh Sneferu (c. 2600 BC), the Ancient Egyptian pyramids used corbel vaults in some of their chambers. These monuments include the Meidum Pyramid (around 2600 BC), the Bent Pyramid (c. 2600 BC) and its satellite pyramid, and the Red Pyramid (c. 2590 BC). The Great Pyramid of Giza (c. 2580–2560 BC) uses corbel arches at the Grand Gallery. The Egyptians discovered the principle of the true arch early on, but continued to use the corbel arch in many buildings, sometimes mixing the two in the same building. In particular they avoided the true arch in temples as long as these were constructed, [2] preferring rectangular openings with a straight lintel.
Corbel arches and vaults are found in various places around the ancient Mediterranean. In particular, corbelled burial vaults constructed below the floor are found in Middle Bronze II-III Ebla in Syria, and in Tell el-Ajjul, Hazor, Megiddo and Ta'anach in Canaan (today's Israel and Palestine). [3] Ugarit, an ancient port city in northern Syria, also has corbelled structures.[ citation needed ]
Nuraghe constructions in ancient Sardinia, dating back to the 18th century BC, use similar corbel techniques.[ citation needed ] The use of beehive tombs on the Iberian Peninsula and elsewhere around the Mediterranean, going back to 3000 BC,[ dubious – discuss ] is also similar.[ citation needed ]
The Hittites in ancient Anatolia were also building corbelled vaults. The earliest ones date to the 16th century BC.
Some similarities are found between the Hittite and Mycenaean construction techniques. Yet the Hittite corbelled vaults are earlier by about 300 years. [4]
Greece has a long list of surviving or archaeologically studied corbelled arches and vaults used for bridges and a multitude of other structures, dating from the Mycenean and Minoan, the late Classical, and the Hellenistic periods. [5]
The ruins of ancient Mycenae feature many corbel arches and vaults, the Treasury of Atreus, built around 1250 BC, being a prominent example. The Arkadiko Bridge is one of four Mycenean corbel arch bridges, which are part of a former network of roads, designed to accommodate chariots, between Tiryns and Epidauros in the Peloponnese, in Greece. Dating to the Greek Bronze Age (13th century BC), it is one of the oldest arch bridges still in existence and use.[ citation needed ]
The well-preserved Hellenistic Eleutherna Bridge on Crete has an unusually large span of nearly 4 metres. [6] A second nearby bridge, which had survived until the late 19th century, is tentatively dated to the late Classical period. [6]
Corbeled arches are a distinctive feature of certain pre-Columbian Mesoamerican constructions and historical/regional architectural styles, particularly in that of the Maya civilization. The prevalence of this spanning technique for entrances and vaults in Maya architecture is attested at a great many Maya archaeological sites, and is known from structures dating back to the Formative or Preclassic era. By the beginning of the Classic era (ca. 250 CE) corbeled vaults are a near-universal feature of building construction in the central Petén Basin region of the central Maya lowlands. [7]
Before the true arch was introduced in Indo-Islamic architecture, almost all the arches in Indian buildings were either trabeated or corbelled. In North India in the state of Orissa, "the later temples at Bhubaneswar were built on the principle of corbelled vaulting, which is seen first in the porch of the Mukteswar [a temple said to epitomize North Indian architecture, circa AD 950] and, technically speaking, no fundamental change occurred from this time onwards." [8]
The earliest large buildings of the Delhi Sultanate established in 1206 after a Muslim invasion used Indian workers used to Hindu temple architecture, but the patrons were used to Central Asian styles that used true arches heavily. Corbel arches, the largest of exceptional size, were used in the massive screens in front of the Quwwat-ul-Islam Mosque in Delhi, begun in 1193, and the Adhai Din Ka Jhonpra mosque, Ajmer, Rajasthan, c. 1229. These are examples of Islamic architecture drawing on Persia and Central Asia, where builders were well used to the true arch, that stick with the corbelled arch that Indian builders were used to. [9]
It took almost a century from the start of the Delhi Sultanate in 1206 for the true arch to appear. By around 1300 true domes and arches with voussoirs were being built; the ruined Tomb of Balban (d. 1287) in the Qutb complex in Delhi may be the earliest survival. [10]
The candi or temples of Indonesia which were constructed between 8th to 15th century, made use of corbel arch technique to create a span opening for gate or inner chamber of the temple. The notable example of corbel arch in Indonesian classic temple architecture are the arches of Borobudur. The interlocking andesite stone blocks creating the corbel arch, are notable for their "T" formed lock on the center top of the corbel arch.
All the temples in Angkor made use of the corbel arch, between the AD 9th and 12th centuries.
An arch is a curved vertical structure spanning an open space underneath it. Arches may support the load above them, or they may perform a purely decorative role. As a decorative element, the arch dates back to the 4th millennium BC, but structural load-bearing arches became popular only after their adoption by the Ancient Romans in the 4th century BC.
Ancient Roman architecture adopted the external language of classical ancient Greek architecture for the purposes of the ancient Romans, but was different from Greek buildings, becoming a new architectural style. The two styles are often considered one body of classical architecture. Roman architecture flourished in the Roman Republic and to an even greater extent under the Empire, when the great majority of surviving buildings were constructed. It used new materials, particularly Roman concrete, and newer technologies such as the arch and the dome to make buildings that were typically strong and well engineered. Large numbers remain in some form across the former empire, sometimes complete and still in use today.
A dome is an architectural element similar to the hollow upper half of a sphere. There is significant overlap with the term cupola, which may also refer to a dome or a structure on top of a dome. The precise definition of a dome has been a matter of controversy and there are a wide variety of forms and specialized terms to describe them.
Indian architecture is rooted in the history, culture, and religion of India. Among several architectural styles and traditions, the best-known include the many varieties of Hindu temple architecture and Indo-Islamic architecture, especially Rajput architecture, Mughal architecture, South Indian architecture, and Indo-Saracenic architecture. Early Indian architecture was made from wood, which did not survive due to rotting and instability in the structures. Instead, the earliest existing architecture are made with Indian rock-cut architecture, including many Buddhist, Hindu, and Jain temples.
The ancient Romans were the first civilization to build large, permanent bridges. Early Roman bridges used techniques introduced by Etruscan immigrants, but the Romans improved those skills, developing and enhancing methods such as arches and keystones. There were three major types of Roman bridge: wooden, pontoon, and stone. Early Roman bridges were wooden, but by the 2nd century BC stone was being used. Stone bridges used the arch as their basic structure, and most used concrete, the first use of this material in bridge-building.
An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side, and partially into a vertical load on the arch supports. A viaduct may be made from a series of arches, although other more economical structures are typically used today.
In architecture, a corbel is a structural piece of stone, wood or metal jutting from a wall to carry a superincumbent weight, a type of bracket. A corbel is a solid piece of material in the wall, whereas a console is a piece applied to the structure. A piece of timber projecting in the same way was called a "tassel" or a "bragger" in England.
A triumphal arch is a free-standing monumental structure in the shape of an archway with one or more arched passageways, often designed to span a road, and usually standing alone, unconnected to other buildings. In its simplest form, a triumphal arch consists of two massive piers connected by an arch, typically crowned with a flat entablature or attic on which a statue might be mounted or which bears commemorative inscriptions. The main structure is often decorated with carvings, sculpted reliefs, and dedications. More elaborate triumphal arches may have multiple archways, or in a tetrapylon, passages leading in four directions.
The Qutb Minar complex are monuments and buildings from the Delhi Sultanate at Mehrauli in Delhi, India. Construction of the Qutub Minar "victory tower" in the complex, named after the religious figure Sufi Saint Khwaja Qutbuddin Bakhtiar Kaki, was begun by Qutb-ud-din Aibak, who later became the first Sultan of Delhi of the Mamluk dynasty. It was continued by his successor Iltutmish, and finally completed much later by Firoz Shah Tughlaq, a Sultan of Delhi from the Tughlaq dynasty (1320–1412) in 1368 AD. The Qubbat-ul-Islam Mosque, later corrupted into Quwwat-ul Islam, stands next to the Qutb Minar.
A barrel vault, also known as a tunnel vault, wagon vault or wagonhead vault, is an architectural element formed by the extrusion of a single curve along a given distance. The curves are typically circular in shape, lending a semi-cylindrical appearance to the total design. The barrel vault is the simplest form of a vault: effectively a series of arches placed side by side. It is a form of barrel roof.
A chaitya, chaitya hall, chaitya-griha, refers to a shrine, sanctuary, temple or prayer hall in Indian religions. The term is most common in Buddhism, where it refers to a space with a stupa and a rounded apse at the end opposite the entrance, and a high roof with a rounded profile. Strictly speaking, the chaitya is the stupa itself, and the Indian buildings are chaitya halls, but this distinction is often not observed. Outside India, the term is used by Buddhists for local styles of small stupa-like monuments in Nepal, Cambodia, Indonesia and elsewhere. In Thailand a stupa itself, not a stupa hall, is called a chedi, a local Thai word derived from the Pali Cetiya. In the historical texts of Jainism and Hinduism, including those relating to architecture, chaitya refers to a temple, sanctuary or any sacred monument.
Indo-Islamic architecture is the architecture of the Indian subcontinent produced by and for Islamic patrons and purposes. Despite an initial Arab presence in Sindh, the development of Indo-Islamic architecture began in earnest with the establishment of Delhi as the capital of the Ghurid dynasty in 1193. Succeeding the Ghurids was the Delhi Sultanate, a series of Central Asian dynasties that consolidated much of North, East, and Central India, and later by the Mughal Empire during the early 16th century. Both of these dynasties introduced Islamic architecture and art styles from West Asia into the Indian subcontinent.
The Mayan architecture of the Maya civilization spans across several thousands of years, several eras of political change, and architectural innovation before the Spanish colonization of the Americas. Often, the buildings most dramatic and easily recognizable as creations of the Maya peoples are the step pyramids of the Terminal Preclassic Maya period and beyond. Based in general Mesoamerican architectural traditions, the Maya utilized geometric proportions and intricate carving to build everything from simple houses to ornate temples. This article focuses on the more well-known pre-classic and classic examples of Maya architecture. The temples like the ones at Palenque, Tikal, and Uxmal represent a zenith of Maya art and architecture. Through the observation of numerous elements and stylistic distinctions, remnants of Maya architecture have become an important key to understanding their religious beliefs and culture as a whole.
Mesoamerican architecture is the set of architectural traditions produced by pre-Columbian cultures and civilizations of Mesoamerica, traditions which are best known in the form of public, ceremonial and urban monumental buildings and structures. The distinctive features of Mesoamerican architecture encompass a number of different regional and historical styles, which however are significantly interrelated. These styles developed throughout the different phases of Mesoamerican history as a result of the intensive cultural exchange between the different cultures of the Mesoamerican culture area through thousands of years. Mesoamerican architecture is mostly noted for its pyramids, which are the largest such structures outside of Ancient Egypt.
Ancient Maya art comprises the visual arts of the Maya civilization, an eastern and south-eastern Mesoamerican culture made up of a great number of small kingdoms in present-day Mexico, Guatemala, Belize and Honduras. Many regional artistic traditions existed side by side, usually coinciding with the changing boundaries of Maya polities. This civilization took shape in the course of the later Preclassic Period, when the first cities and monumental architecture started to develop and the hieroglyphic script came into being. Its greatest artistic flowering occurred during the seven centuries of the Classic Period.
The history of construction traces the changes in building tools, methods, techniques and systems used in the field of construction. It explains the evolution of how humans created shelter and other structures that comprises the entire built environment. It covers several fields including structural engineering, civil engineering, city growth and population growth, which are relatives to branches of technology, science, history, and architecture. The fields allow both modern and ancient construction to be analyzed, as well as the structures, building materials, and tools used.
Cultures from pre-history to modern times constructed domed dwellings using local materials. Although it is not known when or where the first dome was created, sporadic examples of early domed structures have been discovered. Brick domes from the ancient Near East and corbelled stone domes have been found from the Middle East to Western Europe. These may indicate a common source or multiple independent traditions. A variety of materials have been used, including wood, mudbrick, or fabric. Indigenous peoples around the world produce similar structures today.
Adhai Din Ka Jhonpra is a historical mosque in the city of Ajmer in Rajasthan, India. It is one of the oldest mosques in India, and the oldest surviving monument in Ajmer.
A segmental arch is a type of arch with a circular arc of less than 180 degrees. It is sometimes also called a scheme arch.
Ancient Indian architecture ranges from the Indian Bronze Age to around 800 CE. By this endpoint Buddhism in India had greatly declined, and Hinduism was predominant, and religious and secular building styles had taken on forms, with great regional variation, which they largely retain even after some forceful changes brought about by the arrival of first Islam, and then Europeans.