48-747 shape grammars - carnegie mellon universitybungalow originally, small vacation house or...
TRANSCRIPT
48-747 Shape Grammars
THEBUNGALOWSOFBUFFALO
byDowningandFlemming
bungalow
originally, small vacation house or country retreat
at the turn of the 20th century, it also referred to permanently occupied suburban houses that share features with the original
this led to conventions and principles that regulated their exterior appearance and internal organization, i.e.,pattern books
paper concentrates on one aspect, viz., spatial organizationas seen in theirfirst floor plans or rather
different geometric realizations from the same set of conventions
thesources
1915
1914
1918
19151919
-twostreetsandsevenbungalows
-Street1andfivebungalows
thesources
19241926
-secondstreetandtwobungalows
bungalowgrammar
This paper represents the first application to buildings in the popular tradition
language→style←shapegrammar
analytic shape grammars are intended for a particular style
clarify commonality of structure and appearance manifest in buildings in a corpus; here,�
7 measured drawings of houses �from 1914 to 1926
supply conventions and criteria to determine whether any other building outwith the original
corpus is an instance of the style; and
provide a compositional machinery to describe other buildings in the style
thecorpus
thesources
1915
1914
1918
19151919
–twostreetsandsevenbungalows
Street1andfivebungalows
thesources
19241926
Street2andtwobungalows
thebungalows
thebungalows
Bungalow B
Bungalow C
Bungalow D
Bungalow E
Bungalow F
Bungalow G
thebungalows
Each bungalow contains on its first floor:
a living room, a dining room, a kitchen, and a staircase leading both
to the basement and to the upper floor.
Houses B to G contain also two bedrooms and a full bathroom on their first floors (in house located in the second floor)
To these rooms are added in each plan ancillary spaces, such as storage areas or halls, in various combinations.
Spaces are identified by the grammar through simple letter symbols; the meaning of the symbols used is given in table (see next)
conventionsfortheshapegrammar
primary spaces: living, dining, kitchen, bedrooms
secondary spaces: all other rooms
requirements: functional | contextual | formal
spaces are identified by symbols
symbol meaning symbol meaning
b bedroom m additionalliving
c closet n,o,p openporches
d dining q enclosedporch
h hall s staircase
K kitchen t bathroom
l living v vestibule
(0,0):K,1
Initialshape
requirements
Functionalrequirementsdeterminethenatureandsizeofthespacesinaplanaswellascertainconnectivityrelationsbetweenpairsofspacesoraspaceandtheoutside
Contextrequirementsareimposedontheplansbythelongandnarrowshapeofthelots,whichfacethestreetalongtheirsmallerside.Thestreet,inturn,orientsthebuildings:itgivesthema'front'anda'rear',andallplansrespondtothisorientationaccordingtowell-definedconventions.
Formalrequirementsoraestheticconventionsreflectstrongnotionsof'goodshape'
thegrammar
stagesinshapegrammar
allocationofspaces
startingpattern
primaryspaces
+staircase,bathroom&hall
extensionofspaces
+built-inclosets
mergingofspaces
+porch
generationofconnections
frontentrance
secondentrance
internaldoors&openings
windows
termination
allocationofspaces
exemplar
startingpattern
Allknownshapegrammarsthatdealwiththegenerationofarchitecturalplanscreate,inafirststage,ageometricpatternwhichdeterminescertainglobalcharacteristicsoftheplansandguides,possibly,alsothedevelopmentofsomeoftheirlocalproperties.
• ThegenerationofaPalladianplanstartswiththeproductionofatartangridwhichdeterminesthepossiblelocationsofinternalorexternalwalls(StinyandMitchell,1978).
• ThedesignofafacadeinthestyleofTerragni'sCasaGiulianiFrigerioisgovernedthroughoutbytherhythmestablishedthroughfourrowsofcolumnsgeneratedatthestartoftheprocess(Flemming,1981a).
fromthepatternbook–arectangularboxwithalargepitchedroof
“IntheEast,eventhecheapesthouse,exceptwhenitisoccupiedonlyforacoupleofmonthsinthesummertime,requiresacellarandacomparativelysubstantialfoundationandasthisfoundationisthechiefsourcesofexpensethetendencyistomakeitcoverassmallanareaaspossibleandtobuildoveritacomparativelyhighsquareboxofahouse.ThenecessityofprovidingaroofwithaslopesharpenoughtoshedthesnowreadilytendstomakeourcheaperEasternandMiddleWesternhouseastiff,angularlittlebuilding,whichisratherpercheduponthesitethanhighlyfittedtightlytoit”
Hodgson,1912
creatingastartingpattern
Schema1definestheexternalwallsthatformtheenclosureforthistypeofstructure;thelineswithendpointsfandrmark,respectively,itsfrontandrear(withrespecttothestreet).Theschemaalsogeneratesaninternal,load-bearingwallwhichdividestheenclosedareaintotwoparallelzones.
(common)measureddimensions
Bungalow Length Width Clearwidthuz
Clearwidthlz
A 39’6” 24”9” 12’0” 11’0”
B 44’0” 24’6” 12’0” 11’0”
C 44’0” 26’0” 13’6” 11’4”
D 44’6” 26’3” 13’6” 10’6”
E 47’0” 27’0” 12’6” 12’3”
F 45’0” 23’3” 10’0” 10’6”
G 44’0” 22’6” 11’0” 9’10”
allocatingprimaryspaces
Inallplans,livingroom,diningroom,andkitchenformaclusterofpublicspaces,andthebedroomsform,togetherwithsomesecondaryspaces,anadditionalclusterofmoreprivatespacessothatthespacesineachclusterarerelatedtoeachotherortotheoutsideinawell-definedway.
allocatingstaircase,bathroomandhall
8,10
Allbathroomsandstaircasesinoursampleborderanexternalwall,butareneverallowedtofacethefrontoftheplanortooccupyoneofitscorners.Thebathrooms,furthermore,areaccessibleonlyfromaninternalhall,whichisalsoconnectedtothebedroomsandoneotherprimaryspace;thehallthusactsasabufferbetweenthepublicandprivatespaces..
rulesasatreeof
possibility
extendingthespaces
11Amostnoticeablefeatureofthebungalowsarebaysorprojectingroomswhichinterrupttherectangularenclosureofthesehouses.Mostbaysarenecessarilynotrequiredforfunctionalreasonsastheydonotincreasetheusableareatoanysignificantdegree.
addingabuilt-inclosets
16Allbedroomsinthecorpushavedirectaccesstoabuilt-incloset.Theplacementoftheseclosetsassuresthattheboundaryofthebedroomsretainsitsregular(mostlyrectangular)form.
mergingoridentifyinglivingspaces
21
m
l'
Togeneratemostoftheplansinthecorpus,adjacenthallsorlivingroomsthatweregeneratedinpreviousstagesmustbemergedintolarger,continuousareas.
mergingoridentifyinghallspaces
26Hallscanonlybecombinediftheshapeofoneofthesurroundingspacesisalsochanged.
addingafrontporch
28Allbungalowsinoursamplecontainaporchfacingthestreet.Itcanbeopenorenclosed,butisalwayscenteredaboutthelongitudinalaxisoftheplan.
generationofconnections
exercise
NormallyIwouldtellmystudentstoreadthesecondhalfofthepaperandfollowtherulesandseeiftheycanproducethefinalconfiguration
However…
recap–stagesinshapegrammar
allocationofspaces
startingpattern
primaryspaces
+staircase,bathroom&hall
extensionofspaces
+built-inclosets
mergingofspaces
+porch
generationofconnections
frontentrance
secondentrance
internaldoors&openings
windows
termination
addingafrontentrance
Frontentrancesalwaysmakethelivingroomaccessiblefromthestreeteitherdirectlyorthroughavestibulewhichservesasanairlockbetweentheinsideofthebuildingandtheoutside.
andfrontstairs
31,38Schemata38and39resplyplacestairsinfrontofaporchandavestibule.Schema40addsstairsfromthesideofaporch(plansBorE).Schema41allocatesstairsinsideavestibule(planG).
andfrontstairs
44Eachbungalowcontains,inadditiontoafrontentrance,asecondentranceatthesideorrear.Kitchenandbasementstairsarealwaysaccessiblefromthatentrance.
generationofinternaldoorsandopenings
Internaldoorsareusedtoconnect:
• Bedroom↔hall,bathroom↔hall,
• Closet↔eitherbedroomorsomeotheradjacentspace.
Additionaldoorsconnectthefollowing:
• diningroom↔kitchen,hall↔livingroomorhall↔diningroom.
Largeopeningsareusedtoconnectthefollowingpairsofspaces:
• livingroom↔diningroom,twoadjacentlivingspaces,
• enclosedporch↔livingroomorenclosedporch↔diningroom.
screenwalls
Screenorwindowwallsareusedtoenclosepartsoftheopenings.
Mostconspicuousarethescreenwallsplacedintheopeningsbetweenlivingroomsanddiningrooms.Theseopeningsarelargeenoughtogeneratecontinuousareaswhichcanextendoverseveralspaces(especiallyinplansFandG),butareneverallowedtodissolvecompletelythewallsinwhichtheyareplaced;theformalintegrityoftheconnectedspacesthusremainsintact.
generateinternalconnections
46,47,49
generatingwindowsandfireplaces
Inthebungalows,allprimaryspacesandsomesecondaryspacesareconnectedtotheoutsidethroughwindows.
Thebuildingsalsocontainfireplaceswhicharemostlypurelydecorativefeatures,thatis,notconnectedtoaflue.
Thelocationsofwindowsandfireplacesarecloselyrelated;ourgrammarthereforegeneratestheseelementssimultaneously.
Schematatogeneratewindows
schematatogeneratewindowsandfireplaces
51,53,57,66
termination
69,72,73