CORNERS and Public Spaces

Post 696 –by Gautam Shah

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This is the 4 th article of series: ‘CORNERS’.

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Public spaces turn impromptu arenas with political, social and cultural interest, accompanied by some economic activities. The spaces manifest as gathering places, where events recur on specific days like full-moon days, low tide days, Sundays or annual days. Such places occur with some preexisting location cues like a built-form or a natural feature. A gathering place is the starting element of a larger concept of a social space. Defined passageways or casual pathways feed these places. The ending faces of such feed points, give unique and lasting shape to the form. The architectural contour may take ages to evolve on its own, or is remastered for a style by a ruler or plutocrat. In both the cases the essence of social place and shape of the form are sustained.

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The words plaza, place and piazza have the same Greek origin, with plaza being the Spanish adaption, place in French, and piazza the Italian one.

3 La piazza vista dalla Torre Grossa Wikipedia Image by Luca Aless

4 France Sarlat La Caneda by Dennis33053

Public spaces subsist on enclosures. Enclosures occur first by barriers of natural elements like terrestrial masses, water bodies, edges of terrain contours, silhouettes. Public spaces are realized as the physical reach, limits of power or sanctimony and the sensorial perceptibility. The public spaces are delineated by the facade planes and mass of the built objects. Facades’ perimeter becomes extensively lineated when the space is multi-angular, and the connecting passages do not abut at right angles. Compared to these, variations in ‘squared public spaces’ are too few, flat and uninteresting from any spatial position and at any time of the day. The multi cornered irregularly, shaped public spaces create vivid spaces. But straight roads converted into public or pedestrian space just by eliminating the vehicular traffic create a static space.

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Squared public space is rarely a natural development. The improvisations touch only the main level, but other floors continue to operate with their unrelated businesses. The public is expected to get the relief of participation by coming here out of their ghettos. The space making barriers of plants and shrubs, architectural contours, or street occupations like stalls or fountains and furniture, forge the visual depth and physical reach, but behind it, the enclosures of the facades remain unchanged. Squared architectural public spaces remain sterile entities, in spite of occupational interventions.

Different Illumination Conditions Change Functional and Visual character

The enclosures of public spaces occur by a mix of circumstances and situations. The variations of sunny and shadowed sections through the day and across the seasons are recurrent, and so taken for granted. But sunny and shadowed zones affect the functional spread, and define the usage schedules of public spaces. These also promote the use of moderating devices like awnings and screens, which in turn create vibrant edges. The varying sunlight brightens up the facades, more so when these are oriented at acute angles. The daylight variations in morning haze and in evening twilight the change the perception. The edges recede or advance, and add new effects of diffused or enhanced silhouettes. Night illumination of public spaces was once spotty, but by contrast highlighted the warmly lit interiors. Modern outdoor illumination of the floor and facades transform the spatial definitions. At night the unseen undulations, angles, depths, reach of interiors, scattered elements of space, all reveal new formations.

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The environmental variations in ‘squared public spaces’ are prosaic and uninteresting, because the spaces, facades remain constant. The illumination is without any variation and consistent from all locations. Lack of angles in the space fail to create dark-light contrasts. There are few surprises. What has been formatted on the ground was perceived through as a ‘site-plan’ or site-model’, always viewed from above. Nowadays ‘walk-throughs’ as 3D modelling are attempted, yet the comprehension is extremely narrow, selective and subjective. The squared public spaces remain naive ‘compositions of horizontal and vertical surfaces which create volumes of vacancy’.

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11 Palacio de Bellas Artes, preeminent fine arts hall in Mexico, Fore areas of Important Public buildings become spaces of gathering Wikipedia Image by ChaneekPhotography

Public spaces are of three basic types: naturally evolved, remastered with buildings or landscape design, and freshly planned. The considerations are visual edges, skyline or silhouettes, spatial interventions through elemental positioning, barriers, scaling, mastering patterns, perspectives, etc. But corners are rarely ‘designed or exploited’, yet they are omnipresent and unassailable. Corners remain, characteristic essence of the space.

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The enclosures, of long walls facades, make the area finite. But the feed streets or lanes serve as reference points and with their depth increase the perimeter. The corners at feed points are inclusive, because here the change is noted, but open to negotiation. The sited elements do not form the public space, but the movement of light, shadows, sources, strengths and spread of illumination, people moving around perceiving the changing orientation of objects, visual changes in colour, texture and scale, all give a temporal scale.

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grand place Brussels

In this respect, Cullen made a valuable distinction between ‘enclosure’ and ‘closure’. Enclosure, he argued, provided a complete ‘private world’ that is inward -looking, static and self-sufficient. Closure, by contrast involved the division of the urban environment into a series of visually digestible and coherent ‘episodes’ retaining a sense of progression.

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Vertical enclosing elements strongly scale the open spaces. The difference is acutely realized when older open spaces begin to be surrounded by tall structures. It is also true that denser and taller surroundings provide more footsteps. Public buildings like places of religion, court of law, or government offices, older monuments with large fore-spaces are compressed by taller surroundings.

Light Up Public Square

In public spaces, a dramatic change is experienced when architecture and environment, together differentiate the exterior versus the interior. The realization is spatially extreme and temporally sudden, in terms of scale, temperature, and illumination. It is something akin to what Peter Zumthor has described, the transition as an incredible sense of place, an unbelievable feeling of concentration. We suddenly become aware of being enclosed, of something enveloping us, keeping us together, [and] holding us.” Crossing the threshold from outside to inside bring the sudden feeling of being confined, and in reverse direction it is a relief. The thresholds are well marked and easily sensed, though some allow a slowed transition.

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In Western India, areas beyond the Fort gates of towns and cities are impromptu public spaces, formed by traders and others who have no visitation rights. But the gate leads to narrow road branching out at a point called ‘Chakla’. Chakla is a smaller scale public space as commercial hub for the insiders. It was also socially safer.

8 Chakla and Gates Ahmedabad 1855

Public spaces are more envisioned by the spread of the floor. The floors unless contoured and with patterned colour and textures, do not offer any divisions. The floor patterns have been explored as coalescing and regimenting factor. The imposed geometry of the pattern connects diverse and askew elements in the open space. Floorings are free flow or with bounding the perimeter, but are not the physical edges. Other important elements of floor occupation are the shadows of sunlight and night illumination. Both of these, cast visual and functional zones.

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477 AGORA and FORUM -as public spaces

The terms public space or gathering place is often used for large spaces that are mere cross road junctions. The surrounding areas have high commercial activity. The users are business visitors, tourists or commuters, but no local users. The movements are of Two types: One set is between adjacent feed points generating peripheral traffic, and other consists of cross traffic dividing the space into various sections. The First, creates impinging circumferential pressure on near by buildings, whereas the Second, scales the space, till the density and intensity are low remains low, giving it a perception of ‘manageable zones’.

19 Urban connection with Neighbourhoods or Tourist Traffic Puerta_del_Sol_(Madrid)_04

Distinct urban connections are desired for public places, but not ones that create the impinging circumferential pressures or divide the space into various sections. The simpleton urban design strategy is to devise ‘traffic free spaces’ by blocking and diverting the movement. The plan should be to favour the local residents over the business visitors, tourists and commuters. In many of the public spaces the local residents are shifted out in favour of non resident visitors.

26 Trafalgar Square Public area London Rodrigo Silva

‘Piazzas feel like being in human-scaled outdoor rooms; very large courtyards, not like the aforementioned parking, cars and sometimes skyscrapers that are associated with plazas’.

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MASKING and FRAMING of OPENINGS

Post 695 –by Gautam Shah

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Glass Building Glass Dome Berlin Reichstag Dome

Masking and Framing of openings, have many diverse purposes but both are substantiated by their edges. Openings have their own definitive closed ended edges, but masking and framing redefines these many times with open-ended edges. The edges, not only isolate a segment of the opening, but always make the view more emphatic and relevant. The edges of the mask, such as, sharp, frayed, fuzzy, angular, curvilinear, etc. create interference, but offer qualitative change. The edges of the frames, such as, inward or outward chamferring, angular or ‘stream-lined’ rounded profiles, strongly vertical or horizontal emphasis, etc. provide a sense of enclosure. Masking and Framing, have some overlapping functions and serve complementary functions.

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Masking and Framing, have been elements of imposition to alter the conditions of the openings. Both have a secondary role of structural support. The structural support becomes real when these are integrated with the openings’ system. But the treatments may remain superfluous impositions. Such impositions include LED insertion within the glazing, or over the surface projection of images (like speech readers used by anchors). Masking and Framing, are made antithetical. These are now eliminated or diffused for simplicity, clarity, minimalism and even delusion.

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Masking has to be a smaller entity than the opening, for it to be meaningful. Masking is inhibiting or a restrictive element that resizes the opening and so controls the view, passage, effects of environment. Masking is both, planned and incidental. Planned masking offer superior conditions and perception, whereas incidental masking has surprises and new lessons. Openings are intentionally masked by architectural elements, items of furniture and furnishings, occupants. Openings get incidentally masked by growth of plants and trees, neighbouring buildings and environmental conditions.

Old Home Window Glass Architecture Within

The sizes of openings are affected by the depth aspect. Visual depth induces a perspective view. Wherever the sides are visible, add to the extent of a visual surface, and creating a frame within frame view. Imposed architectonic elements shield the opening with shadows that are more articulated than the original shadow casting elements. This overshadowing is a type of masking, reducing the apparent size opening. Similar effect occurs with deep-set and square-edged openings.

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The framing, however, became really dominant with the chamferred sides, sills, ledges and lintel bottoms. The chamferring of edges enhances the depth aspect of the opening. It adds to the extent of a visual surface, and creating a frame within frame view. The chamferring increases the view of exterior from inside, and if on inside face, it adds to perceptual illumination.

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Framing of opening mainly occurs as a surround element. But the surrounds are rather too thin as jambs, and so need casing and architraves for emphasis. Reshaping of openings in the frontal plane was tried with pointed arches in Gothic period. Real reshaping of the openings and curvilinear bending was tried out in the Baroque and Rococo architecture. With the reshaping and curvilinear bending of the openings, the architectural walls were also reformatted.

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In Art Nouveau style, the openings were reshaped, and to heighten that effect, masking grills were used to de-form the rectangularity. The openings, with some restrains, and the grills, with complete abundance, used free flowing asymmetrical forms. To this vocabulary, glass patterns by way of frosting, etching, grinding and stained colouring were added.

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Early glass for windows was produced as cut bottom of a bulb or cylinder. These had residual ripple patterns, imparting a fuzzy view. The defect was subdued by masking it with translucent sheer curtains and by framing it with a grid of muntins and mullions as in Colonial sash windows.

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High quality modern glass has extra ordinary surface gloss, making it a mirror like a surface. The glossy glass if placed on the edge without sun-shading reflects the surroundings, and also reflecting sunlight as bounce-back, causing a nuisance to neighbouring properties and blinding with the glare the moving vehicles. This is now being controlled through building regulations. The solutions are masking the glass with polymer films or polychrome treatments.

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Openings are occluded by stationary and mobile objects that manifest on the inside and outside. Objects occluding a brightly lit opening are seen as silhouette or outline. A person sited against an opening can see gestures of others, but in reverse direction others fail to perceive the expressions and ignore him/her. For correct modelling some illumination or reflections from other sides are required. But this can also happen if the object has multiple planes oriented differently. The scale of occluding objects is its absolute size and relatively the distance from the opening as well as the perceiver.

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Framing and Masking, have relevance of nearness. The framing becomes irrelevant at closer distance. Masking for visual screening is more affective at a distance, but for illumination control, it is affective at all distances.

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MY BLOGS > LINKS with #URBAN

Post 694 –by Gautam Shah

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These are few of My BLOGS search-listed as “URBAN”.

SMELLS and SPACES https://designacademics.wordpress.com/2019/05/06/smells-and-spaces/

URBAN SMELLS https://designacademics.wordpress.com/2019/05/13/urban-smells/

449 SPATIAL SMELL BRANDING https://designsynopsis.wordpress.com/2019/05/04/449-spatial-smell-branding/

448 URBAN LIFE in 17 C https://designsynopsis.wordpress.com/2019/05/03/448-urban-life-in-17-c/

125 URBAN CLIMATE https://designsynopsis.wordpress.com/2018/03/13/125-urban-climate/

The CORNER in City https://interiordesignassist.wordpress.com/2018/05/17/the-corner-in-city/

CORNERS and Neighbourhoods https://interiordesignassist.wordpress.com/2018/09/07/corners-and-neighbourhoods/

The CORNER -metaphor https://interiordesignassist.wordpress.com/2018/05/01/the-corner-metaphor/

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HOW do we SITE BUILDINGS https://interiordesignassist.wordpress.com/2015/10/06/how-do-we-site-buildings/

LOCATION of BUILDINGS https://interiordesignassist.wordpress.com/2015/06/30/location-of-buildings/

ROOFS 3 -Skyline and Silhouette https://interiordesignassist.wordpress.com/2015/02/06/roofs-3-skyline-and-silhouette/

VALUATION OF BUILDINGS https://interiordesignassist.wordpress.com/2015/01/04/valuation-of-buildings/

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Sloped Roofs https://interiordesignassist.wordpress.com/2014/05/02/sloped-roofs/

REFERENCING buildings -issues for design -15 https://interiordesignassist.wordpress.com/2017/07/09/referencing-buildings-issues-for-design-15/

REUSE of BUILDINGS https://interiordesignassist.wordpress.com/2017/03/27/reuse-of-buildings/

ENGINEERING PROJECT MANAGEMENT https://interiordesignassist.wordpress.com/2016/04/24/engineering-project-management/

GRADES of EXTERIOR and INTERIOR SPACES https://interiordesignassist.wordpress.com/2016/01/27/grades-of-exterior-and-interior-spaces/

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PLACE IDENTITY https://interiordesignassist.wordpress.com/2016/01/06/place-identity/

VALIDITY of BUILDINGS https://interiordesignassist.wordpress.com/2015/04/19/validity-of-buildings/

CORRIDORS and PASSAGES Transfer Systems in Buildings (Part – IV ) Vasari Corridor of Florence https://interiordesignassist.wordpress.com/2014/12/17/corridors-and-passages-transfer-systems-in-buildings-part-iv-vasari-corridor-of-florence/

EVOLUTION of PROJECTS https://interiordesignassist.wordpress.com/2014/10/01/evolution-of-projects/

IDENTITY in a SPACE https://interiordesignassist.wordpress.com/2014/08/20/identity-in-a-space/

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OPENINGS through AGES

Post 693 –by Gautam Shah

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17 Roman Market street

Openings have been expressions of whatever was happening inside, and also as exclusive exterior statements.

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ROMANESQUE windows were overshadowed by colonnades and piers, but the adjacent areas became very articulated. Here jambs or sides were formed with a series of receding moulded planes. The arch above also had the receding concentric rings, following the lines of the recesses of jambs below. The Romanesque fluted pier first replaced the Greek-Roman columns, and later the capitals and entablatures. Two or three stormed -triforium clerestories were created to lit up the interior, manage the semicircular openings. Several windows with semicircular heads were sometimes grouped together and enclosed in a larger arch. Windows often head a central support element in the form of a column or a pier. A wheel-shaped window, placed over the main West door later became the Rose-window.

3 Openings concealed in arcades Roman villa carthage

EARLY CHRISTIAN PERIOD, windows were small in proportion to the entire mass of the facade. The size was accentuated with chamferred sides and sills but the basic opening gap was functionally bare minimum. It provided adequate light, but not the heat gain that was required in North European climates. Windows gradually began to fill the Romanesque semicircular arched openings. Internally the structure was framed. Externally the walls began to carry loads at the base points of arches. Semi circular arches began to be replaced by pointed arches. These reduced the span of opening, and reduced the load on the pier. Closely spaced light piers and pointed arches created an interior space that was tall and vertical.

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Roman circular arch was well a respected architectural element. Traditional Christians would not change it to anything else. But Goths came to dominate large territories across Europe. They were perceived to be marauders and lacking any thing ‘decent’. Goths never accepted Roman manners or architecture but began to adopt Moorish technology and simple cultural values and artistic customs. Most important, they adopted a simplistic form of Christianity, the Arianism, allowing birth of Gothic. Gothic was then perceived as a derisive term for the ‘uncivilized and destructive lifestyle’ of Goths.

19 A baptistry of the Arians in Ravenna

GOTHIC STRUCTURES carried thrusts to the piers through the buttresses, virtually eliminating the wall. Windows occupied all the space freed by walls. To make windows stable against wind pressure and support, the leaded glass panes of large windows had sub frames of transoms and mullions. Tracery was used to mould the rectilinear character of the sub frames. By varying the pitch of the pointed arch, unlike semicircular arched openings, it was possible to have windows of different widths for the same floor height. Window tracery, was a later invention of the Gothic period. The stained glass replaced the traditional wall treatments like mosaic or paintings in oil or stucco. Building materials like marble were exposed for their grain.

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Lantern church’ with perpendicular windows rising from floor to vault, was not a suitable style for non church buildings like palaces, colleges, etc. Windows were also not required to be as large in sunny parts of Europe like Spain and Italy.

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This led to REVIVAL OF ROMAN STYLE wall with punctured windows. Windows were once again square headed, comparatively small, multi-functional, eye levelled and easy to merge into variety of interior treatments. These windows were abutted with pilasters, half columns and also by offset arcade of full columns.

church_columnar_italy_viterbo_stone_wood_blanket_dom-489532In Spanish architecture of LATE GOTHIC ERA AND EARLY RENAISSANCE, the window and its appended decorative elements created a composite facade element. In Italian Renaissance the facade was like an interwoven fabric spread all over (Doges palace, Venice) and terminating at a very strongly articulated architectural element. In horizontal directions these elements were eaves, sills, pediments, etc. in vertical direction the pilaster, column, doorway etc. terminated the flow. Windows were adorned with balustrades, and galleries. Buildings were topped with statues, lanterns, domes, drums, accentuating the vertical lines of the window opening. The remaining surface of the wall was intensely emphasized through rusticated masonry or moulded bands. In other European locations (Germany) the window composition was repeated to create a strong linear facade. Corner window and Oriel were used.

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In ITALIAN RENAISSANCE the facade was like an interwoven fabric spread all over (Doges palace, Venice) and terminating at a very strongly articulated architectural element. In horizontal directions these elements were eaves, sills, pediments, etc. in vertical direction the pilaster, column, doorway etc. terminated the flow. Windows were adorned with balustrades, and galleries. Buildings were topped with statues, lanterns, domes, drums, accentuating the vertical lines of the window opening.

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Kennel Old Town Dresden Baroque

BAROQUE ARCHITECTURE which emerged in the later part of Renaissance, many conventions were removed. Wall surfaces instead of being linear now began to be curved and undulating. Window openings were often oval, circular but deeply recessed. Vertically sliding windows or sash windows were favoured for its ease of opening, controlled ventilation. Sash windows had rectilinear subdivisions, filled with better quality see through clear water-white glass. Sash windows were painted white, and placed in brick masonry work (English later Renaissance).

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In early part of RENAISSANCE the exteriors truthfully reflected the interior space modules, but very rarely the function. The facade was a mask. The make-believe continued till it was despised as vulgar by the POST INDUSTRIAL REVOLUTION PERIOD.Tadao Ando - Water Temple 水御堂 40

 

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VANDALISM -Issues of Design 27

Post 692by Gautam Shah

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640px-Graffiti_Kom_Ombo

Vandalism is willful destruction of property and culture. Property and culture are spacious words. Property includes buildings, structured public assets, art, artefacts etc. Culture covers political, religious, economic and social systems, and institutional arrangements. A property can subsume culture, so any danger to former is a threat to the later. Vandalism is as much a personal act and common act of individuals, as it is conduct emulated by individuals with some commonality, so group-based conduct.

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Vandalism is interpreted as criminal damage, misdemeanor mischievous behaviour, malicious or otherwise trespassing, breach of privacy, felony offense intentional indifference. Vandalism laws are designed to prohibit and discourage the such conduct.

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Vandalism is an attempt to change the existing set of things or order. It may not involve annihilation or removal of things. On occasions, the actions are directed to the owner, authority or God. And even if the search for them is solvable, but the vandals may have nothing to correspond except the intense desire to register their presence.

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Destructive actions can be ascribed to anger or envy, or to spontaneous, opportunistic behaviour. The action may be for peer acceptance or bravado in gang cultures. The cause of disgruntlement with a person or society could be absence of a target. Private citizens commit vandalism by willfully damaging or ignoring the damage to the property of others or the common assets.

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Vandalism against the common values of the group or society may arise for not being included or invited. It may be that the opposed values are too prominent and so the target. Values enshrined in properties are challenged when changes for betterment or creative interventions are made without due permission or authorization are made. Values are compromised when subtle or explicit ideological ‘messages’ are conveyed through public expression or conveyance through social media. The vandalism may occur when values conveyed through a declaration may be subjectively interpreted as harmful or annoying.

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In the world of internet and social medial vandalism takes the shape of ethical and revengeful hacking of domains and data there in. It may also include persistent and massive ‘trolling’ through hash-tags.

9 Burning of the Euromaidan headquarters in the Trade Unions Building.

Political vandalism is ideological ingress leading to protests, riots. So far it remains an expression it can be tackled through debate. But it can turn an expression of hatred and intimidation. Vandalism can be perceived as a legitimate act, and a social warning for course correction. So minor action may be ignored.

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In Design and other fields, plagiarism of concepts is equated with vandalism. Similarly altering, correcting, extending, renovation, removal of someone’s creation is always debatable, and borders to an act of vandalism. These include morphing, photo-shopped images, edited videos, etc. Other acts of design barbarism are ‘under or short’ designing a brief, overshooting budget, ignoring the stakeholders, generating non-performing solutions and infringing other professionals’ duties.

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The name Vandals is connected to that of Vendel, a large East Germanic tribe or group of tribes initially from the name of a province in Uppland, Sweden. It is believed that Vandals migrated from here to establish kingdoms in Spain and then North Africa in the 5th C. Renaissance and early-modern writers characterized the Vandals as barbarians who sacked and looted Rome. This led to the use of the term vandalism to describe any senseless barbaric defacing of artwork. The etymology of vandal may be related to a Germanic verb wand -to wander.

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This is the 27th article (in continuation of old series -new beginning) on ISSUES of DESIGN

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SASH WINDOWS

Post 691 –by Gautam Shah

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The word sash, derives from the French chassis, which means a frame or a window shutter that holds a glass pane. Technically sash windows refer to an opening system where the framed glazed panels are opened by sliding vertically, or horizontally, against casement windows where shutters are hinged and open sideways. Sash windows, when opened, have no shutters projecting out, so resist rains better and pose lesser fire risk. Sash windows are less susceptible to warping due to moisture, as the shutter is bounded by a frame. Sash windows open by remaining within their frames, so do not distract, as do the hanging shutters of the casement windows. The casement shutters had to be of small-width, or tended to ‘drop at the free edge’. The small shutter width required many mullions to divide the opening. The wrought-iron hinges and lead cames of the casement windows were dark and heavy, compared to the clean image of the sash windows.

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Sash windows allow control over air ventilation, as it can be opened to a small slit to nearly 50 % of the opening. By keeping open both the top and bottom of a sash window by equal amounts (in double hung sash window), it allows warm air to leave at top and cool air to enter through the bottom. This facility of controlled ventilation saw major drive for use of Sash windows replacing the Casement windows.

9 Gulllotine Sash Window Châté_Lîzabé_f'nêt'

The earliest-known use of sash windows was in the later part of the 17th C. Sash windows with their better proportions and elegance compared to casement windows, soon became the most important visual element in buildings of the 18th and 19th C. Sash windows became so popular that people who could afford, replaced the leaded-light casement windows. Many 16th and 17th C houses have ‘replacement sash windows’. Such changes, however, were affected on the main facade only, less prominent facades and side faces continued with the original casement shutters.

3 At_Paraty,_Brazil_2017_100The window tax (during 1696 – 1861, in England) forced people to wall-up unnecessary windows to save tax, and also add fictitious windows for the sake of composing a facade. In spite of the taxation (window tax and a heavy excise duty on glass in 1746) discouragements, this was the period when windows design saw some of the most innovative changes.

Windows were initially positioned flush with the front face of the building, but great fire of London forced authorities, in 1907, to set back all windows by 4″ from the outer face of masonry. To further reduce the risk of fire, in 1774, the exposed wood box containing the cord and weight mechanism was required to be concealed in the side masonry.

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The first sash windows of 17th C were glazed with very heavy glass requiring thick oak frames and glazing bars. However, with the availability of thinner cylinder glass from 18th C onward during Georgian period, sash windows became lighter and elegant. Production of plate glass, from 1850 onward allowed, larger panes of glass. Larger and thinner glass panes required no or fewer glazing bars. The reinforcement offered by the glazing bars was eliminated, and so horns had to be added to strengthen the junction of the meeting rail with the frame. In more expensive work, the glazing bars were made of iron or brass and painted to appear like wood.

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To slide open a sash shutter by sliding up or down, its weight is balanced by counterweight concealed within the window frame. The counter weight bar of lead, wrought steel or cast iron is connected to the window by a sash cord or chain running over a pulley at the top of the frame. The wheels were of wood or brass. In later versions spring balances were used. In earlier versions the weight boxes, set flush with the outer wall, seemed very heavy, but in later versions due to fire laws the weight boxes were concealed in side masonry, making the sash windows look much lighter.

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The glass used in early sash windows was not very clear, so the view through was fuzzy. The divided pane divided and framed the view into smaller bearable units. The presence of glazing bars, was a ‘relief’. As glass technology developed larger panes, free of the blur and blemishes were available requiring thinner or no mid glazing bars.

2 Archiepiscopal_Palace_in_Salvador_Southwest_Elevation_Window_2018-0191

The earliest sash windows were of natural wood colour, with brass and cast steel hones, joggles, weight covering plates etc. Curved horns, multi-arched heads, intricate mouldings, leaded lights and latticework started to appear in the sashes, which were often grouped into impressive bays and offset with ornate stone reveals. The shutter and the side box were made from different quality of wood. The sash window was a strange mix of materials and finishes. White painted sash windows provided single finish effect, very well contrasted by the brick masonry. The white colour over glazing bars also reduced their presence against the glass, making the windows look more elegant. The preference for white colour sash windows has continued till today even though materials have changed from wood to plastics, steel and aluminium.

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Before 1887 buildings tended to be painted in one colour, usually white, beige or gray. But later people began to paint their houses in lighter and brighter colours. The vibrant colours became a key identifiable feature of Victorian architecture. The latter part of the 19th C brought a new attitude toward colour, but sash windows continued to be painted in the Queen Anne style of white.

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Sash windows originated as an opening system with two distinct sections: the top was of fixed glazing (divided into smaller lites) and the bottom section had a casement or sliding (vertical) sash. Some exceptional buildings had exterior-wall flushed windows with sash sliding horizontally and parking on the side wall.

Divisions in Sash

The bottom and top sashes (two are not necessarily of the same size) were divided into 3 x 2 =6, 3 x 3 =9 or 4 x 2 =8 glass panes. Each vertical rectangle reflected the proportion of the whole window. The 3 x 2 = 6 glass pane divisions have been accepted as the classical pattern for sash windows.

Boston USA Historic houses

Windows with one movable sash are called single-hung sash windows, to contrast from double-hung sash windows, where both sections open by sliding against one another. Alternatively, one shutter opens by sliding and the other opens out or inward with simplex hinges. Simplex hinges allow the shutter to get locked on one side while the other side is freed for opening for escape or easy cleaning of shutters from both sides. Typical double-hung windows of Georgian architecture feature the lower sash in front of the upper sash. The fixed sash at the top allowed it to match the curvilinear arched openings.

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Triple and quadruple hung windows are used for tall openings, common in New England churches. Among the numerous types of 18th C sash windows, the tripartite or Venetian consisted of a central sash with two side lights, one pane wide. The side lights were often fixed, with the sash cord running over their heads from the central sash into the weight boxes.

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In tropical climates, double-hung sash windows were covered from outside by fixed louvered shutters. Some double-hung windows have a full window screen that needs to be positioned suitably over the open section. Sash windows were also built to appear as casements in Gothic and Tudor Revivals. These often involved elaborate detailing with moulded mullions and even concealing the boxes for pulleys and weights.

White Sash Windows geograph-2696053-by-Stephen-Richards

The growth in use of the casement increased during the Edwardian period, and by 1910 many houses were built with timber casements, with sash windows relegated to less important elevation. By 1939, the use of sash windows was confined to neo-Georgian buildings, particularly post offices, banks, public houses and local housing estates.

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Georgian Windows are classical double-hung sash windows. Early in the 18th C, Georgian window of 3 x 2 =6 panels per sash matured. This basic configuration ofsix panes over six panes’, remained in use even after the advent of larger panes in the 19th C. Georgian sash wood windows remained widely used form till the use of steel casement windows, as a cheaper and functionally superior option.

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8 Horizontal Sliding windows geograph-1620701-by-Alan-Murray-Rust

Horizontal Sliding Sash Windows have two or more sashes that overlap slightly but slides horizontally within the frame. In UK, these are sometimes called Yorkshire sash windows, presumably because of their traditional use in that area.

Box-head Sash Windows have shutters sliding vertically into the wall space above the header. Guillotine Windows have only one of the two sashes, usually the top one dropping down. The early versions of windows were without the counterweights or balancing system, and so had a tendency to come slamming down. Hanging Sashes are hung on a cord connected to counterweights.

 

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DOOR PROPORTIONS

Post 690 –by Gautam Shah

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1 Geometrie Proportion Portal

2 Door Geometrical Divisions

A door has some fundamental significance, Proportion (of Width vs Height aspects), Size (anthropometrics) and Scale (relative size to things around it). And all these imply different meaning on the exterior and interior faces. The door size, proportion and scale, relate to the architectural schema, fore-space and contours, interior of room, and functional passage requirements.

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Doors have shutters, gates, frames, portals, surrounds, heads, thresholds, and other architectural adjuncts. These elements affect the form of the door. The doors could be really or perceptively narrow, wide, tall, short, small, large, thin or deep. But proportion is one character that remains consistent in all scales.

18 Chapel Door by Sigurd Lewerentz httpswww.flickr.comphotosseier2340686947

PROPORTIONS

Most common set of proportions (Width : Height) have been: Two squares 1: 2, and Golden proportion 1:1.61. Other shapes include Square (Le Corbusier’s Ronchamp Doors), Horizontal Rectangle (Air hanger’s shutters). Sliding doors have a horizontal rectangle form. For twin shutters, each is of square shape. Multi panelled shutters have to maintain the horizontal bias for ease of movement. The real proportion of a door is seen when the shutter is open. A mid-pivot shutter may divide the opening in equal or unequal gaps. A door opening is more prominent if it is deep-set in the portal, or has contrasting colour+texture from its surround structure.

5 Square Ronchamp door by Le Corbusier httpswww.flickr.comphotosyellowbookltd3648223450

4 Entry Gate to Assembly Building Capitol Complex Chandigarh India Wikipedia Image by Lillottama

The vertical rectangular form makes the opening taller then its width. Small-width doors are technologically more efficient to construct and operate it ergonomically. Such narrow widths reduce the load on the hanging devices such as hinges and so are easy to open. Horizontal sliding doors, for easier movement, need to be wider then their height. Square doors are favourite with designers, but cannot be hung on side-end hinges. A square gap mislays its form when opened on mid or offset pivots. Very wide doors use vertical or horizontal pivots (garage doors) or sliding mechanisms (Japanese doors, Shop Rolling shutters).

Lincon Main Entrance

Historically Door Goal Portal Input Gate

22 Notre Dame Paris Multiple entrances httpswww.flickr.comphotos27398485@N0825558255261

Instead of a wide door, multiple (ganged) doors used at railway station are multiple units in a row. Similar effect occurs for multiple folding or stacking shutters for verandahs. Multiple doors and shutters provide spaced control for simultaneity, location, orientation. Where multiple tracks are not, feasible, shutters are joined together like the bellows of an accordion to form a sliding and folding stack. Folding or collapsible doors were first used in cabinets and cupboards, and diffuse the exchange over a wider zone.

7 Multiple Doors httpspixabay.comendoors-open-series-input-3798125

 

9 Olympic Park Railway Station Ticket Barriers

SIZE

A door is primarily sized for passage of humans, but often designed for mix of purposes. Some doors are exclusively for passage of goods and animals (hoppers, trap or flap doors), and so may not have any size relevance for human passage. Doors are functional elements of optimal size yet economics and technology govern its size and details. The critical aspect of door design is its width aspect. An insufficient width retards the speed, or even makes it difficult or impossible to transit through. But small width enforces discipline on chaotic traffic of entrants. Narrow width openings increase the integrity of the load-bearing structure. A very generous width fails to. Such wide openings need extra dividing barricades to channelize the traffic, or multiple narrower sub-gate systems. Bunker doors must be carefully small sized for increasing resistance to blast pressures.

Médinet-Abou. Porte du Grand Temple (Égypte) _

Door portal size and the size of the shutter, are two different things. Doors of extra ordinarily large sizes or monumental proportions have been used through ages. A large door metaphorically denotes unrestricted transit, grand reception, fearlessness or power, affluence, and dominance. Technologically a door shutter cannot be very large, so doors placed in large portals and with adjunct structures.

18 False Door dawn of civilization Egypt and Chaldaea

As a social concern in modern times, it is essential to provide doors widths suitable for disabled persons, using walking stick, crutch walkers, a wheel chair, stretcher or assisted by others. Widths of doors for, toilet, elevators, closets, store rooms, change rooms, and such other lone user utilities are considered more critical for such users.

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Some famous doors > Treasury of Atreus, Mycenae 9′-0” x 18′-0″, Parthenon, Rome 0′-0″ x 24′-2″, Erechtheion, Athens 8′-0″ x 17′-2″, S. Martin, Worms 5′-8″ x 11′-3″, Palazzo Pietro Massimi, Rome, main entrance door 6′-10″ x 13′-8″, National Archives in Washington, DC, Constitution Avenue bronze doors 37′-7″ x 10′ (and 11″thick), Vehicle Assembly Building VAB of NASA door height 456′.

10 Vehicle Assembly Building VAB of NASA door height 456'

Simple sliding doors allow variable and exact control over the width of opening. Automatic sliding doors such as for elevators and for entrances of public buildings open to width governed by the density and frequency of traffic. Revolving doors have optimum opening size to maintain the air lock and prevent anyone forcing a reverse movement. Folding shutter doors allow incremental width of the opening. Garage doors sliding up were devised to get a maximum width of opening.

11 Shutting-Opening-Pushing a hinged, pivoted or sliding Door if large sized, can be a technological issue

Height of a door is checked for three parameters: the height available within the opening, the height of the door head, and the height of the threshold. The actual passage height of a door is affected by the level of terrain immediately inside and outside the door. Low level doors have been used to reduce the heat gain or loss (e.g. igloos), the storm water (e.g. sea front warehouses in America).

12 Multiple stacked doors for floors of West India Quay Canary Wharf Warehouse served by single pulley lift httpswww.flickr.comphotosell-r-brown6455291621

SCALE

The scale of a door is governed by the architectural scheme, impinging built mass and the surrounding terrain. The scale of a door is also referential. Proportionately a door or gate opening seems smaller, if the adjacent wall or barrier system is very evident. On the same scale a large or multiple openings make barriers less effective. The exchange occurring across a small opening is very intense, compared to a large gateway.

13 Door and Portal Buland Darwaza Fatehpur Sikri India Wikipedia Image by Diego Delso, delso.photo, License CC-BY-SA

14 Adjunct structures Gwalior Fort Entry Gate Wikipedia Image by Divyarthsuryavanshi httpscommons.wikimedia.orgwikiFileGwalior_Fort_Entry_Gate

Adjunct structures enhance the perceived scale and significance of the door. Fort gates and other gateways have not only very large doors but also have elaborate adjunct structures like portals, abutments, ramparts, bulwarks, bastions, Bastille, battlements, belvederes (Chhatri), buttress, campaniles (bell towers). Historically, very large (wide and tall) doors have been a necessity, for functional passage as well as for splendour. Doors are intentionally made smaller, if these are insignificant (backdoor, servant door, supply door), or need to be concealed, such as the secret or escape doors. Mid town gates are designed as multiple (three or five) openings to serve different levels of traffic. Doors are added with side and top lites, pediment, surrounds, free columns or half-pilasters to enhance the scale.

20 Hypostyle Hall of the Hathor Temple at Dendera (XI) httpswww.flickr.comphotosisawnyu8390823916

Egyptian temples had very tall openings, the lower section was shuttered and the upper section was a left over gap, which allowed entry of early morning Sun God Ra. Gothic churches had upper section of the door converted into a Rose window. Very tall doors, unless required for passage, are turned into transom lites. Very tall doors require a visual correction. Romans constructed tall doors with a wider base and narrower top. For very tall doors, the construction of strong shutter and relevant opening control mechanisms have been the greatest deterrent. Tall opening like effects are created with architectural door portals and alcoves where the functional door is very much smaller.

15 Pantheon Entrance Wikipedia Image by daryl_mitchell from Saskatoon, Saskatchewan, Canada

Low level doors have been used to reduce the heat gain or loss (e.g. igloos), the storm water seepage (e.g. sea front warehouses in America). Romans constructed tall doors that were wider at the base than at the top to correct the visual perspective.

16 Lateral stiffening of Dam Gates in Matsumoto city, Nagano prefecture, Japan. Wikipedia Image by Qurren

Large door shutters require lateral stiffening, as the usual thin shutter leaf construction is insufficient against buckling forces such as the wind, blasts, and often sonic boom pressures. Aircraft hangers’ and spaceships’ assembly workshops (Apollo, Columbia, USA) have very large doors with additional lateral framing. Hanger doors are designed to be sliding from top, bottom or both. Similarly dams and canal gates have to resist not only the pressure of retained water but dynamic pressures of waves and eddy currents. Such doors are designed as 3D entities. Stadia and such public spaces where people are likely to push against the gates, extra lateral stability is required.

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