DOOR HEADS

DOOR HEADS

Post 254 ⇒   by Gautam Shah  →

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An opening in a wall without a head seems incomplete. A heading element completes the identity of a gap. The heading element, as a flat, circular or a segmental arc, creates a doorway or gateway. The heading element with or without a super structure, bridges the sides of the walls or the jambs giving a structural stability in stresses like an earthquake. The bridging or heading element is appended with small super body to enhance the surface at head level. It does not add any bearing load.

Temple of Horus at Edfu Egypt

From primitive times it was realized that heading elements, need to be of better quality material, then the bearing structures and had to be of monolithic materials like wood or stone. Such large monolithic entities of extra ordinary size and weight have been managed in on open sites construction of Dolmens. To carry and manipulate such a mass inside partly constructed site was very difficult.

Dolmen on Ganghwa, Republic of Korea

Anta da Aboboreira Dolmen, Baião, Portugal

The Lion Gate, at the main entrance of the Bronze Age citadel of Mycenae, of 13 C. BC, had a huge lintel that measures 4.5×2.0×0.8 m size, spanning 3.10 m gap. The corbelled masonry courses reduce the bearing load on lintel.

Lion Gate of Mycenae, southern Greece

Lintel stone at the Treasury of Atreus

Póvoa de Varzim, in Portugal

A gap can be headed for decorative and structural purposes such as bridging the side and to carry the loads of super structure. Monolithic structures such as wood lintels have uncertain life, Stone lintels had ill-defined bearing properties, and were prone to sudden cracking under load and movement or torque stresses. As a result for several centuries, gaps have been square headed by lintels, and topped with arches or corbelled masonry work.

Royal Palace entrance of Ugarit on the Mediterranean coast of Syria

Trabeated arch Delhi India

Newgrange a prehistoric monument in County Meath, Ireland

The door heads of stone after serving the function of a bridging element (adding the integrity of a structure) were load-lightened by variety of techniques. These included corbelled masonry, arching, double layered lintels, a secondary layer of lintels, provision of lattices, openings (lites) and deep carving. In case of wood, geometric constructions like framing or trussing was used. Romans’ covered opening gaps with full, segmental and flat arches of bricks and stones.

Ancient Roman arched heads

The Romans, later in Romanesque and Revival buildings, the Tympanum or triangular pediment was used as the basic form for door head. It had stone carving, and sculptured terracotta as story depiction form. Later the pediments’ forms were dissected and several versions were created.

sections of the sculpture of the tympanum of the Parthenon

Tympanum Allen County Courthouse (Indiana) USA

Pediments

The pediment as a triangular form was a strong shape, its tapering ends reflected the structural behaviour of a spanning element. It was projected out of the wall and supported by free columns or half-pilasters. Due to the small width of the gap the pediment triangle was also small, and could not accommodate any sculpture. The pediments were cut at top, bottom and even sides to add sculpted over sized figures, geometric patterns and medallions.

Broken or dissected Pediment

In India and other parts of Asia Door heads were treated, both as a stand alone panel, and also integrated with the openings’ treatment. There were few representative elements common in temple doors, such as the Goddess Laxmi (of riches), Crocodile, Elephants, Lotus and water. Depiction of a mythological story is also common. The door head panel was not a triangular bound entity like European pediments.

Ornate lintel Wat Phu, Champasak Laos

Khmer Lintel

bas-relief in a Tympanum at Banteay Srei shows Indra releasing the rains in an attempt to extinguish the fire created by Agni

Lintel over Mandapa entrance at Chennakesava Temple, in the Hoysala architecture tradition of southern India

The blind door at Banteay Srei by columns and topped by a tympanum with a scene from the Mahabharata

A 9th C lintel at Musée Guimet, with Garuda carrying Vishnu

Kirtimukha above a Hindu temple entrance in Kathmandu, Nepal

Door jamb and lintel of Kasivisvesvara temple Lakkundi, India

In Gothic architecture, the triangulated door heads became circular or pointed arch. The thick wall and the door head both were chamfered. The tapered sides had serrated edges. The fluted lines were stretched to the sides of the door. The flatter section over the door and covered by the pointed arch was the story board.

Notre Dame Cathedral Paris

In Spanish architecture the door heads have grown from the finite confines of the tympanum to become an integrated approach to framing of an opening. It could cover a part or whole of the façade, often including upper-level window openings.

Vila do Conde – Detail portico manuelí església

Rococo portal in Matriz Church

Mission San José (Texas) USA

Wood Door heads have been very different creations. Material, mass and strength have moulded their design.

carved wooden door in the Great Mosque of Kairouan, Tunisia.

wood architecture Door Head of Norway

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STRUCTURES over DOORS

by Gautam Shah ➔

Doors’ openings have to carry the load of upper structure. Square headed doors had lintel-beams of wood or stone beams that spanned 2 to 3.5 mts. For larger spans the openings were corbelled (stepped -projecting masonry from both ends). In spite of corbels creating a triangular head, the actual door remained square cornered. For very wide openings, masonry in arch form was used. During the middle ages a variety of arches were used, like: semicircular, elliptical, 2/3/4/5 centred, rampant, compound and interlaced and flat. Materials of arch construction were mainly stones and burnt bricks. Roman arched gateways were typically 4 to 7 mts. in the span, though in public buildings concrete arched vaults of very large spans were used. Pointed arches allowed spanning different widths, yet remain within the required height.

346px-93_-_Machu_Picchu_-_Juin_2009

Lintel Opening Avolsheim Dompeter Strasbourg

Corbelled Arch tomb of Nasir ud din Mahmud,Ghori New Delhi

 Pointed arched openings were larger at top increasing the size of transom lite opening, and the lower or door level (i.e. below the arch spring line) the section was narrowed. The resultant horseshoe shape was slightly defiant of gravity and looked delicate, as in middle-east architecture.

Gate of the Justice – Alhambra

Walls around the openings, like Doors and Windows were massive but often of rubble or irregularly coursed masonry. These were unreliable to carry heavy loads of entities such as lintels, arches, etc. To carry the loads door surrounds of better materials and with properly organized joints were created. The door surround was masonry framing against which the pivoted door shutters were abutted. However, Gothic period (and equivalent time in other cultures) saw well-layered wall masonry, and replacement of door surrounds with wood frames for fixing hinged doors. Wood door frames were non-load bearing elements placed for ‘hanging’ the hinged door shutters, and so were just minimal in size. Rest of the opening sides were covered with casings (a type of door side panelling).

Gothic Arch and Lintel opening with Tympanum Rochester Cathedral

591px-Fenêtre_villa_lutetia,_14_rue_Larrey

The upper sections of the arched openings for windows were filled with traceries or, i.e. pierced panels as a continuation of the pattern from lower section. However, in the upper parts of doors openings, very often a solid panel was inserted like a tympanum. The tympanum panel was a separate piece, usually placed over a lintel. So a Gothic opening had arch spanning the door portal, and an inset lintel spanning the door opening. The dual arrangement for support allowed the Gothic door surround to have chamfered corners or have a serrated form.

Le_temple_de_Taleju_Bhawani_(Bhaktapur)_(8554839485)

Close_up_of_the_lintel_over_shrine_entrance_in_the_Bhimeshvara_temple_at_Nilagunda

In Gujarat and other parts of western India a stylized stone archway -Toran is placed as door head. A Toran is a set of inclined brackets that additionally support the centre of the square headed beamed opening, and pass the load to columns. Toran acquired status equal to the threshold as a metaphysical entrance. The metaphoric presence of a Toran marked the entrance. Decorative Toran of glass beads, glass tubes, embroidered cloth, flowers, leaves, coconuts, etc. are hung even today to signify a door during celebrations on auspicious occasions.

Toran Neemuch Madhya Pradesh India

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