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A prefabricated building, informally a prefab, is a building that is manufactured and constructed using prefabrication. It consists of factory-made components or units that are transported and assembled on-site to form the complete building.<br>For more visit: https://multidecor.in/
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CONTENTS Introduction Scope Review Systems Advantage & Disadvantage CaseStudy Conclusion
INTRODUCTION “Prefabrication is the practice of assembling componentsof a structure in a factory or other manufacturing site, and transporting complete assemblies to the construction site where the structure is to belocated’’.
PREFABRICATIONSYSTEM • Prefabricated building is a type of building that consists ofseveral systems. Open prefab Large prefab Box type construction
PREFABRICATION HOUSECOMPONENTS Panels Basechannel Cappingchannel Post Roof Floorsystem
WALLPANELS Precast wall panel is an independentlysupported vertical member in a prefabricatedstructure. size of the panels depends onclient requirements Wall assembly usually contains insulation, wiring,and pre-cut openings forwindows and doors Using an assemblage of metaljoints components andanchors. Generally four types of precast panels used Cladding or curtainwalls Load-bearing wallunits Shearwalls Formwork for cast-in-placeconcrete
FLOORS • Precast flooring units could be homogeneous ornon homogenous. • Homogeneous floors : solid slabs, hollow coreslabs. • Non-homogeneous floors : multilayered oneswith combinations of light weightconcrete
PREFABRICATION DESIGN GUIDELINES • Material resistance andstability. • Safety in case offire. • Hygience ,health andenvironment. • Protection againstnoise. • Energy saving and heatinsulation. • These are the parameters which probably might in additionto normal design of theelements
MATERIALUSED Concrete Steel TreatedWood Aluminium Light weightelements Ceramicproduct
MANUFACTUREPROCESS ManufacturingofPrefabricationwillbedoneintwostages 1) Factory Prefabrication. 2)SitePrefabrication. FactoryPrefabrication Factory prefabrication is restored in acentrally located plant for manufacture of standardized components on a long formbasis. Production ofcomponents throughout the year SitePrefabrication. components are manufactured at site nearthe site of work aspossible. The work is normally carried outin open space with locally a valuablelabour The equipment machinery and moulds are ofmobile nature.
CASTING Precast components are casted with controlled cement concrete in moulds of required shape andsizes. Vibrator is used tovibrate concrete and this removes any honeycombing inside thecomponents Aftercompletecuringisdonethecomponentsaretransportedtothesitewith heavytrucksanderectionwillbedoneusing craneswithskilledlabours TRANSPORTATION Transportofprefabelementsinsidethefactorydependsonthemethodof production selected for themanufacture. Availabilityofsuitabletransportequipment, suchastractor,trucketc,tosuits the load and dimension ofthe member Careshouldbetakeninnegotiatingsharpbeds unevenofslushyroadstoavoid undesirablestressesinelementsandintransportvehicles. Care should be taken at base packing for supporting theelements.
ERECTION ORASSEMBLING Setreferencelineanddeterminethepositionofprecastelementstobe installed Levelpadsshouldbeprovidedforsettingtheleveloftheelement. Check alignment and verticality of theelement For corrugatedpipesleeveorsplicesleeveconnection,properandpournon shrinkgroutintothepipeinletsprovided. Keeptheinstallationpanelsundisturbedforatleast24hours. Joints casting &sealing. ERECTION TRANSPORTATION
ADVANTAGES • Provides complex thermalinsulation • Improved quality over on-siteconstruction • Saves time where weather conditions allow briefperiodsof construction • Ithelpsinsafetyofworkers,environmental impact, constructability. • DISADVANTAGES • Handling may cause breakage ofmember. • Difficulty in connecting precastunits. • Skilled workmanship isrequired. • It requires erectionequipment.
CONCLUSION • Duetotheflexibilityofthestructureinexpandabilityandappearancethis prefab houses are thechoice. • Less construction time • The prefabrication components and prefab structure eliminatespace and time over convectionalconstruction • The use of precast concrete construction can significantly reducethe amountofconstructionwastegeneratedonconstructionsites • Reduce adverse environment impact onsites • Enhance quality control of concretingwork Want to know about prefab buildings? Visit: https://multidecor.in/
