Prefabricated Buildings
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Prefabricated Buildings PREPARED BY: RAVI KUMAR M.TECH,2ND SEMESTER BEDM
INTRODUCTION
Prefabrication is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting complete assemblies or sub-assemblies to the construction site where the structure is to be located. Prefabrication, in architectural construction, is a technique whereby large units of a building are produced in factories to be assembled, ready-made, on the building site.
THE HISTORY OF THE PREFABRICATED BUILDINGS
Possibly the first advertised prefab house was the Manning Portable Cottage. A London carpenter, H. Manning, constructed a house that was built in components, then shipped and assembled by British emigrants. The peak year for the importation of portable buildings to Australia was 1853, when several hundred arrived. These have been identified as coming from Liverpool, Boston and Singapore (with Chinese instructions for re-assembly).
Aims of Prefabrication
Speed up the construction time.
Lower the labour cost.
Allow the year round construction.
Ensure precise conformity to building codes , standards and greater quality assurance.
Allow less wastage of materials than n in site- built construction.
Ensure higher worker safety and comfort level than in sitebuilt construction
Prefabricated Housing Prefabricated building is a type of building that consists of several factory-built components or units that are assembled onsite to complete the unit. “Prefabricated” are built in: Manufactured homes Modular homes
(Transportable sections )
(Modules)
Components (panels)
Manufactured Homes
"Manufactured homes are built as dwelling units of at least 320 square feet (30 m2) in size with a permanent chassis to assure the initial and continued transportability of the home.“
Assembled in factories transported to sites of use.
and
then
Modular Homes
They are sectional prefabricated buildings, or houses, that consist of multiple sections called modules.
They are transported and to the home site for construction and installation.
Modular and Manufactured homes are NOT the same.
Prefabricated Building Systems
Large-panel systems
Jump form system
Frame system
Large panel system
It is composed of large wall and floor concrete panels connected in the vertical and horizontal directions so that the wall panels enclose appropriate spaces for the rooms within a building.
Frame System
Precast frames can be constructed using either linear elements or beam-column.
Advantages
Mass production of units
Reduction of costs and construction time on site:
Aesthetic Appeal
Maintenance Free
Large Clear Spans
Controlled Quality
Disadvantages 1.
Careful handling of prefabricated components such as concrete panels or steel and glass panels is required.
2.
Prone to corrosion attack at the joints.
3.
Similarly, leaks can form at
4.
Transportation costs may be higher.
5.
Large prefabricated sections require heavy-duty cranes and precision measurement and handling to place in position.
6.
Local jobs are lost.
Works at CBRI-Roorkee
Design and development of prefabricated components Hollow
panel unit
Prefabricated Housing Unit for Disaster Management
Invented by Dante Bini
A super-low-cost self-erecting prefab housing unit used for disaster relief that can be easily moved from location to location, and takes less than a half-hour to build.
Conclusion
Their shorter build time will save you money on the overall construction.
They are much more energy efficient, and environmental friendly.
Due to the flexibility of the structure in expandability and appearance this prefab houses are the best choice.
From the several advantages like reusability, high scrap value, less construction time makes this user friendly. Also, they can be installed in passive weather conditions also.
References 1.
Leblanc J T, Patent-Apparatus and process for placement of prefabricated structures, US 4517781 A, 21-05-1985
2.
Firoz Syed et al. “Design concept of pre-engineered Building” IJERA, Vol. 2, Iseue-2, March-April-2012, pp-267-272
3.
http://freshome.com/2013/03/27/10-basic-facts-aboutmodular-homes/
4.
Annual Report 2009-10, CBRI Roorkee
INTRODUCTION
Prefabrication is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting complete assemblies or sub-assemblies to the construction site where the structure is to be located. Prefabrication, in architectural construction, is a technique whereby large units of a building are produced in factories to be assembled, ready-made, on the building site.
THE HISTORY OF THE PREFABRICATED BUILDINGS
Possibly the first advertised prefab house was the Manning Portable Cottage. A London carpenter, H. Manning, constructed a house that was built in components, then shipped and assembled by British emigrants. The peak year for the importation of portable buildings to Australia was 1853, when several hundred arrived. These have been identified as coming from Liverpool, Boston and Singapore (with Chinese instructions for re-assembly).
Aims of Prefabrication
Speed up the construction time.
Lower the labour cost.
Allow the year round construction.
Ensure precise conformity to building codes , standards and greater quality assurance.
Allow less wastage of materials than n in site- built construction.
Ensure higher worker safety and comfort level than in sitebuilt construction
Prefabricated Housing Prefabricated building is a type of building that consists of several factory-built components or units that are assembled onsite to complete the unit. “Prefabricated” are built in: Manufactured homes Modular homes
(Transportable sections )
(Modules)
Components (panels)
Manufactured Homes
"Manufactured homes are built as dwelling units of at least 320 square feet (30 m2) in size with a permanent chassis to assure the initial and continued transportability of the home.“
Assembled in factories transported to sites of use.
and
then
Modular Homes
They are sectional prefabricated buildings, or houses, that consist of multiple sections called modules.
They are transported and to the home site for construction and installation.
Modular and Manufactured homes are NOT the same.
Prefabricated Building Systems
Large-panel systems
Jump form system
Frame system
Large panel system
It is composed of large wall and floor concrete panels connected in the vertical and horizontal directions so that the wall panels enclose appropriate spaces for the rooms within a building.
Frame System
Precast frames can be constructed using either linear elements or beam-column.
Advantages
Mass production of units
Reduction of costs and construction time on site:
Aesthetic Appeal
Maintenance Free
Large Clear Spans
Controlled Quality
Disadvantages 1.
Careful handling of prefabricated components such as concrete panels or steel and glass panels is required.
2.
Prone to corrosion attack at the joints.
3.
Similarly, leaks can form at
4.
Transportation costs may be higher.
5.
Large prefabricated sections require heavy-duty cranes and precision measurement and handling to place in position.
6.
Local jobs are lost.
Works at CBRI-Roorkee
Design and development of prefabricated components Hollow
panel unit
Prefabricated Housing Unit for Disaster Management
Invented by Dante Bini
A super-low-cost self-erecting prefab housing unit used for disaster relief that can be easily moved from location to location, and takes less than a half-hour to build.
Conclusion
Their shorter build time will save you money on the overall construction.
They are much more energy efficient, and environmental friendly.
Due to the flexibility of the structure in expandability and appearance this prefab houses are the best choice.
From the several advantages like reusability, high scrap value, less construction time makes this user friendly. Also, they can be installed in passive weather conditions also.
References 1.
Leblanc J T, Patent-Apparatus and process for placement of prefabricated structures, US 4517781 A, 21-05-1985
2.
Firoz Syed et al. “Design concept of pre-engineered Building” IJERA, Vol. 2, Iseue-2, March-April-2012, pp-267-272
3.
http://freshome.com/2013/03/27/10-basic-facts-aboutmodular-homes/
4.
Annual Report 2009-10, CBRI Roorkee
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