Construction of prefabricated house building by easy way

1. PREFABRICATION STRUCTURE
Presented by: Abhishek. M
Under the Guidance of
SRINIVAS K .S
Assistant Prof.
Dept. of civil Engg, SJBIT

2. CONTENTS
Introduction
Scope
Systems
Advantage & Disadvantage
Literature Review
Case Study
Conclusion

3. INTRODUCTION
“Prefabrication is the practice of assembling components of
a structure in a factory or other manufacturing site, and
transporting complete assemblies to the construction site
where the structure is to be located’’.

4. LITERATURE REVIEW
AUTHOR TITLE YEAR DESCRIPTION
Akshaya A
,Et al
'Prefabrication,
Sustainable Technique in
Building Construction
2017 This type of construction is
especially constructed for
inaccessible areas.
Providing for quick installation
support
These structures are easy to
dismantle and relocate.
Neetu B
,Et.al
'Pre-Cast Technology: An
Initial Step to
Sustainable Development
2013 Demand of mass housing targets
can be achieved by precast
construction technique.
To improve structural performance
as well as to maintain quality of
the work.

5. PREFABRICATION SYSTEM
• Prefabricated building is a type
of building that consists of several
systems. Open
prefab
Box type
construction
Large
prefab

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

7. WALL PANELS
Precast wall panel is an independently supported
vertical member in a prefabricated structure.
size of the panels depends on client
requirements
Wall assembly usually contains insulation, wiring, and
pre-cut openings for windows and doors
Using an assemblage of metal joints
components and anchors.
Generally four types of precast panels used
Cladding or curtain walls
Load-bearing wall units
Shear walls
Formwork for cast-in-place concrete

8. FLOORS
• Precast flooring units could be homogeneous or non
homogenous.
• Homogeneous floors : solid slabs, hollow core slabs.
• Non-homogeneous floors : multilayered ones with
combinations of light weight concrete

9. PREFABRICATION DESIGN
GUIDELINES
• Material resistance and stability.
• Safety in case of fire.
• Hygience ,health and environment.
• Protection against noise.
• Energy saving and heat insulation.
These are the parameters which probably might in addition to
normal design of the elements

10. MATERIAL USED
Concrete
Steel
Treated Wood
Aluminium
Light weight elements
Ceramic product

11. MANUFACTURE PROCESS
Manufacturing of Prefabrication will be done in two stages
1) Factory Prefabrication.
2)Site Prefabrication.
Factory Prefabrication
Factory prefabrication is restored in a centrally
located plant for manufacture of standardized
components on a long form basis.
Production of components throughout the year
Site Prefabrication.
components are manufactured at site near the
site of work as possible.
The work is normally carried out in open space
with locally a valuable labour
The equipment machinery and moulds are of mobile nature.

12. CASTING
Precast components are casted with controlled cement concrete in moulds of
required shape and sizes.
Vibrator is used to vibrate concrete and this removes any honeycombing inside
the components
After complete curing is done the components are transported to the site with
heavy trucks and erection will be done using cranes with skilled labours
TRANSPORTATION
Transport of prefab elements inside the factory depends on the method of
production selected for the manufacture.
Availability of suitable transport equipment, such as tractor ,truck etc, to suits
the load and dimension of the member
Care should be taken in negotiating sharp beds uneven of slushy roads to avoid
undesirable stresses in elements and in transport vehicles.
Care should be taken at base packing for supporting the elements.

13. ERECTION OR ASSEMBLING
Set reference line and determine the position of precast elements to be
installed
Level pads should be provided for setting the level of the element.
Check alignment and verticality of the element
For corrugated pipe sleeve or splice sleeve connection, proper and pour non
shrink grout into the pipe inlets provided.
Keep the installation panels undisturbed for at least 24 hours.
Joints casting & sealing.
TRANSPORTATION
ERECTION

14. ADVANTAGES
• Provides complex thermal insulation
• Improved quality over on-site construction
• Saves time where weather conditions allow
brief periods of construction
• It helps in safety of workers, environmental
impact, constructability.
DISADVANTAGES
• Handling may cause breakage of member.
• Difficulty in connecting precast units.
• Skilled workmanship is required.
• It requires erection equipment.

15. CASE STUDY : DREAM VALLEY PROJECT
(AMRAPALI GROUP)
• 7 buildings of 2B+G+18 floors were completed in 18 months of timeline was
made possible through precast technology.
• Achieved a slab cycle of 10-12 days for a slab area of 7000 Sqft.
• Superior quality & finish of construction.
• Cost & time optimisation with the use of hollow-core slabs.
• Reduction in concrete & steel factor per Sqft of built-up area.
• Elimination of brick work and plaster by the use of precast wall panels &
cladding.
• Automation & mechanisation of construction project improved overall
productivity.
• Improved site safety & considerable reduction in wastage, dust & noise on
site, thus reduced ecological

16. CONCLUSION
• Due to the flexibility of the structure in expandability and appearance this
prefab houses are the choice.
• Less construction time
• The prefabrication components and prefab structure eliminate space and
time over convectional construction
• The use of precast concrete construction can significantly reduce the
amount of construction waste generated on construction sites
• Reduce adverse environment impact on sites
• Enhance quality control of concreting work

18. REFERENCE
• Abhishek K, Akshaya A '' Prefabrication, Sustainable Technique in
Building Construction'' (2017) IJSE Volume 1, Issue 2
• Krish R. Villaitramani, Dhruv P. Hirani ''Prefabricated Construction
For Mass Housing In Mumbai'' (2014) (IJIRAE) ISSN: 2349-2163
Volume 1 Issue 9
• Neetu B. Yadav Rushabh A. Shah "Pre-Cast Technology: An Initial
Step to Sustainable Development''(2013) | Vol. 1, Issue 7, 2013 |
ISSN (online): 2321-0613