A parapet is a barrier that is an upward extension of a wall at the edge of a roof,[1]terrace, balcony, walkway or other structure. The word comes ultimately from the Italianparapetto (parare 'to cover/defend' and petto 'chest/breast'). Where extending above a roof, a parapet may simply be the portion of an exterior wall that continues above the edge line of the roof surface, or may be a continuation of a vertical feature beneath the roof such as a fire wall or party wall.[2] Parapets were originally used to defend buildings from military attack, but today they are primarily used as guard rails, to conceal rooftop equipment, reduce wind loads on the roof,[3] and to prevent the spread of fires.
Panelled parapets are ornamented by a series of panels, either oblong or square, and more or less enriched, but not perforated. These are common in the Decorated and Perpendicular periods.[1]
A modern, transparent parapet surrounds a New York City rooftop.
The Mirror Wall at Sigiriya, Sri Lanka built between 477 and 495 AD is one of the few surviving protective parapet walls from antiquity. Built onto the side of Sigiriya Rock it ran for a distance of approximately 250 meters and provided protection from inclement weather. Only about one hundred metres of this wall exists today, but brick debris and grooves on the rock face along the western side of the rock clearly show where the rest of this wall once stood.[4]
Parapet roofsedit
A decorative parapet rings the flat roof of this English public house
Parapets surrounding roofs are common in London. This dates from the Building Act 1707 which banned projecting wooden eaves in the cities of Westminster and London as a fire risk.[citation needed] Instead an 18-inch brick parapet was required, with the roof set behind. This was continued in many Georgian houses, as it gave the appearance of a flat roof which accorded with the desire for classical proportions.
In Shilpa Shastras, the ancient Indian science of sculpture, a parapet is known as hāra. It is optionally added while constructing a temple. The hāra can be decorated with various miniature pavilions, according to the Kāmikāgama.[5] In the Bible the Hebrews are obligated to build a parapet on the roof of their houses to prevent people falling (Deuteronomy 22:8).
Firewall parapetsedit
Many firewalls are required to have a parapet, a portion of the wall extending above the roof. The parapet is required to be as fire resistant as the lower wall, and extend a distance prescribed by building code.
Bridge parapetsedit
Parapets on bridges and other highway structures (such as retaining walls) prevent users from falling off where there is a drop.[6] They may also be meant to restrict views, to prevent rubbish passing below, and to act as noise barriers.
In European standards, parapets are defined as a sub-category of "vehicle restraint systems" or "pedestrian restraint systems".
Parapets in fortificationedit
A parapet fortification (known as a breastwork when temporary) is a wall of stone, wood or earth on the outer edge of a defensive wall or trench, which shelters the defenders.[7][8] In medieval castles, they were often crenellated. In later artillery forts, parapets tend to be higher and thicker. They could be provided with embrasures for the fort's guns to fire through, and a banquette or fire-step so that defending infantry could shoot over the top. The top of the parapet often slopes towards the enemy to enable the defenders to shoot downwards; this incline is called the superior talus.[9]
^ ab"Concrete parapets along road drop off.". Flickr. January 2007. Retrieved 19 September 2014.
^Friar, Stephen (2003). The Sutton companion to castles. Stroud: Sutton. p. 32. ISBN9780750927444.
^George Orwell 1938, Homage to Catalonia; see Chap VII. Orwell frequently speaks of parapets and includes any obstruction planned or temporary including those made of hastily shoveled soil, sandbags of dirt, piles of stones, etc., made during 1936–37 trench warfare when he was a militia soldier in the Spanish Civil War.
^A New and Enlarged Military Dictionary, Charles James, Egerton Military Library 1810.
Bibliographyedit
Senani Ponnamperuma. The Story of Sigiriya, Panique Pty Ltd, 2013 pp 124–127, 179. ISBN978-0987345141.
External linksedit
Look up parapet in Wiktionary, the free dictionary.
Wikimedia Commons has media related to Parapets.
Victorian Forts glossary
What is a Parapet?
February 15, 2024
parapet, parapet, barrier, that, upward, extension, wall, edge, roof, terrace, balcony, walkway, other, structure, word, comes, ultimately, from, italian, parapetto, parare, cover, defend, petto, chest, breast, where, extending, above, roof, parapet, simply, p. A parapet is a barrier that is an upward extension of a wall at the edge of a roof 1 terrace balcony walkway or other structure The word comes ultimately from the Italian parapetto parare to cover defend and petto chest breast Where extending above a roof a parapet may simply be the portion of an exterior wall that continues above the edge line of the roof surface or may be a continuation of a vertical feature beneath the roof such as a fire wall or party wall 2 Parapets were originally used to defend buildings from military attack but today they are primarily used as guard rails to conceal rooftop equipment reduce wind loads on the roof 3 and to prevent the spread of fires The crenellated parapet on a bastion of Kyrenia Castle Cyprus Contents 1 Parapet types 2 Historic parapet walls 3 Parapet roofs 4 Firewall parapets 5 Bridge parapets 6 Parapets in fortification 7 See also 8 References 9 Bibliography 10 External linksParapet types editParapets may be plain embattled perforated or panelled 1 which are not mutually exclusive terms Plain parapets are upward extensions of the wall sometimes with a coping at the top and corbel below 1 Embattled parapets may be panelled but are pierced if not purely as stylistic device for the discharge of defensive projectiles Perforated parapets are pierced in various designs such as circles trefoils or quatrefoils 1 Panelled parapets are ornamented by a series of panels either oblong or square and more or less enriched but not perforated These are common in the Decorated and Perpendicular periods 1 nbsp A modern transparent parapet surrounds a New York City rooftop nbsp Elaborate parapets flank the roof of King s College Chapel Cambridge nbsp A modern parapet with integrated lighting functions as a guard rail along the BP Pedestrian Bridge in ChicagoHistoric parapet walls edit nbsp The Mirror Wall at Sigiriya Sri LankaThe Mirror Wall at Sigiriya Sri Lanka built between 477 and 495 AD is one of the few surviving protective parapet walls from antiquity Built onto the side of Sigiriya Rock it ran for a distance of approximately 250 meters and provided protection from inclement weather Only about one hundred metres of this wall exists today but brick debris and grooves on the rock face along the western side of the rock clearly show where the rest of this wall once stood 4 Parapet roofs edit nbsp A decorative parapet rings the flat roof of this English public houseParapets surrounding roofs are common in London This dates from the Building Act 1707 which banned projecting wooden eaves in the cities of Westminster and London as a fire risk citation needed Instead an 18 inch brick parapet was required with the roof set behind This was continued in many Georgian houses as it gave the appearance of a flat roof which accorded with the desire for classical proportions In Shilpa Shastras the ancient Indian science of sculpture a parapet is known as hara It is optionally added while constructing a temple The hara can be decorated with various miniature pavilions according to the Kamikagama 5 In the Bible the Hebrews are obligated to build a parapet on the roof of their houses to prevent people falling Deuteronomy 22 8 Firewall parapets editMany firewalls are required to have a parapet a portion of the wall extending above the roof The parapet is required to be as fire resistant as the lower wall and extend a distance prescribed by building code Bridge parapets editParapets on bridges and other highway structures such as retaining walls prevent users from falling off where there is a drop 6 They may also be meant to restrict views to prevent rubbish passing below and to act as noise barriers Bridge parapets may be made from any material but structural steel aluminium timber and reinforced concrete are common They may be of solid or framed construction 6 In European standards parapets are defined as a sub category of vehicle restraint systems or pedestrian restraint systems Parapets in fortification editA parapet fortification known as a breastwork when temporary is a wall of stone wood or earth on the outer edge of a defensive wall or trench which shelters the defenders 7 8 In medieval castles they were often crenellated In later artillery forts parapets tend to be higher and thicker They could be provided with embrasures for the fort s guns to fire through and a banquette or fire step so that defending infantry could shoot over the top The top of the parapet often slopes towards the enemy to enable the defenders to shoot downwards this incline is called the superior talus 9 See also editAttic style Baluster Merlon RedoubtReferences edit a b c d e Chisholm Hugh ed 1911 Parapet Encyclopaedia Britannica Vol 20 11th ed Cambridge University Press p 770 Ching Francis D K 1997 A visual dictionary of architecture New York Van Nostrand Reinhold p 266 ISBN 0 442 02462 2 Bedair Rania Comprehensive Study of Wind Loads on Parapets PDF Retrieved 15 June 2021 Ponnamperuma Senani 2013 Story of Sigiriya Melbourne Panique Pty Ltd pp 118 121 ISBN 978 0987345110 Temples of Salem region Up to 1336 AD PDF a b Concrete parapets along road drop off Flickr January 2007 Retrieved 19 September 2014 Friar Stephen 2003 The Sutton companion to castles Stroud Sutton p 32 ISBN 9780750927444 George Orwell 1938 Homage to Catalonia see Chap VII Orwell frequently speaks of parapets and includes any obstruction planned or temporary including those made of hastily shoveled soil sandbags of dirt piles of stones etc made during 1936 37 trench warfare when he was a militia soldier in the Spanish Civil War A New and Enlarged Military Dictionary Charles James Egerton Military Library 1810 Bibliography editSenani Ponnamperuma The Story of Sigiriya Panique Pty Ltd 2013 pp 124 127 179 ISBN 978 0987345141 External links edit nbsp Look up parapet in Wiktionary the free dictionary nbsp Wikimedia Commons has media related to Parapets Victorian Forts glossary Parapet What is a Parapet Retrieved from https en wikipedia org w index php title Parapet amp oldid 1185163429, wikipedia, wiki, book, books, library,
