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. For more visit: https://multidecor.in/

1. Prefabricated Buildings

2. CONTEN
TS
Introduction
Scope
Review
Systems
Advantage &
Disadvantage Case Study
Conclusion

3. INTRODUCTI
ON
“Prefabrication is the practice of assembling componentsof
astructure in afactory or other manufacturing site, and
transporting complete assemblies to the construction site
where the structure is to belocated’’.

4. PREFABRICATION
SYSTEM
•Prefabricated building is atype of
building that consistsofseveral
systems. Open
prefab
Box type
construction
Large
prefab

5. PREFABRICATION HOUSE
COMPONENTS
Panels
Capping channel
Post
Roof
Floor system
Base channel

6. WALL
PANELS
Precastwall panel is anindependentlysupported
vertical member in aprefabricatedstructure.
sizeof the panels dependsonclient
requirements
Wall assemblyusually contains insulation, wiring,and
pre-cut openings forwindows and doors
Usinganassemblageof metaljoints
components andanchors.
Generally four types of precast panels used
Claddingor curtainwalls
Load-bearingwallunits
Shearwalls
Formwork for cast-in-place concrete

7. FLOO
RS
• Precastflooring units could be homogeneous or non
homogenous.
• Homogeneous floors : solid slabs,hollow coreslabs.
• Non-homogeneous floors : multilayered oneswith
combinations of light weightconcrete

8. PREFABRICATION
DESIGN
GUIDELINES
• Material resistance andstability.
• Safetyin caseof fire.
• Hygience ,health and environment.
• Protection againstnoise.
• Energysaving and heat insulation.
Theseare the parameters which probably might in additionto
normal design of theelements

9. MATERIAL
USED
Concrete
Steel
TreatedWood
Aluminium
Light weightelements
Ceramicproduct

10. MANUFACTURE
PROCESS
Manufacturing of Prefabricationwill be done in two stages
1) Factory Prefabrication.
2)Site Prefabrication.
FactoryPrefabrication
Factory prefabrication is restored in a centrally
located plant for manufacture of standardized
components on along form basis.
Production ofcomponents throughout the year
SitePrefabrication.
components are manufactured at site near the
site of work aspossible.
Thework is normally carried outin open space
with locally avaluablelabour
Theequipment machinery and moulds are ofmobile nature.

11. CAS
TING
Precastcomponents are castedwith controlled cement concrete in moulds of
required shapeandsizes.
Vibrator is usedtovibrate concrete and this removes anyhoneycombing inside
the components
After complete curing is done the components are transported to the site with
heavytrucks and erection will be done usingcraneswith skilled labours
TRANSPORTATION
Transportof prefab elements inside the factory dependson the method of
production selected for themanufacture.
Availability of suitable transport equipment, suchastractor ,truck etc, to suits
the load and dimension ofthe member
Careshould be taken in negotiatingsharp bedsuneven of slushyroadsto avoid
undesirable stressesin elements and in transport vehicles.
Careshould be taken at basepacking for supporting the elements.

12. ERECTION OR
ASSEMBLING
Setreferenceline and determine the position of precastelements to be
installed
Levelpadsshould be provided for setting the level of the element.
Checkalignment and verticality of theelement
Forcorrugated pipe sleeveor splice sleeveconnection,proper and pour non
shrink grout into the pipe inlets provided.
Keepthe installation panelsundisturbedfor at least 24 hours.
Joints casting & sealing.
TRANSPORTATI
ON
ERECTI
ON

13. ADVANTAG
ES
• Providescomplex thermal insulation
• Improved quality over on-site construction
• Savestime where weather conditions allow
brief periods of construction
• It helpsin safety of workers, environmental
impact, constructability.
DISADVANTAGES
• Handling maycausebreakageof member.
• Difficulty in connecting precastunits.
• Skilled workmanship isrequired.
• It requires erectionequipment.

14. CONCLUSI
ON
•Dueto the flexibility of the structure in expandability and appearance this
prefab housesare thechoice.
• Lessconstruction time
•Theprefabrication components and prefab structure eliminatespaceand
time over convectionalconstruction
•Theuseof precast concrete construction cansignificantly reducethe
amount of construction waste generatedon constructionsites
• Reduceadverseenvironment impact onsites
• Enhancequality control of concretingwork
Want to know about prefab buildings?
Visit: https://multidecor.in/

15. Thank You!