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PREFAB METHODS
Presented by:
1. Eyad Reda
2. Ahmed Ezzat
3. Abdelrahman Alaa El Din
4. Hussam El Din Ayman
5. Omar Khaled ...
CONSTRUCTION PREFABRICATION
▪ Three main steps
1. Manufacturing components off-site (Factories or workshops)
2. Transport ...
CONSTRUCTION PREFABRICATION
▪ IF divided according to type of materials used
Prefab
Timber
framing
Steel
framing
Sandwich
...
CONSTRUCTION PREFAB
▪ Direct Applications of Prefab
Skyscrapers
Modular
Houses
Bridges
TIMBER WOOD FRAMING
▪ Box Frame
▪ Cruck Frame
▪ Aisled Frame
PANELIZED WOOD FRAMING
▪ All-wood panelized framing
▪ Hybrid panelized framing
SANDWICH PANELS
▪ Honeycomb sandwich panel
▪ Aluminum composite panel (ACP)
The Earth’s Epcot Spaceship
CONCRETE
PRE-STRESSED CONCRETE
▪ How ?
▪ Pre-tensioned tendons instead of
normal steel bars
▪ Allow concrete to withstand
tension b...
PRECAST SLABS
▪ Solid Flat (Traditional)
▪ Hollow Core Flat
▪ High-rise, Bridges
▪ Lower cost, lower weight and fast
assem...
PRECAST BUILDING SYSTEMS
▪ Large Panel System
▪ Large wall and floor panels
▪ BOX-like Rooms
▪ Horizontal and Vertical Joi...
PRECAST BUILDING SYSTEMS
▪ Frame System
▪ Beam-Column Junctions
▪ Corbels at columns for beams
STEEL FRAMING
▪ Super-structure Skeleton
▪ Vertical I-shaped Columns and
Horizontal I-beams
▪ Rectangular grid supporting
...
PREFABRICATION IN SKYSCRAPERS
• You can think of using prefabricated materials in the building of
skyscrapers as “ some LE...
PREFABRICATED SKYSCRAPERS
• Mini Sky City:
-57 stories.
-19 atriums with 10 m tall
each.
-4,000 people working spaces.
-80...
MINI-SKY CITY
SEGMENTAL BRIDGES
▪ Support towers at sides
▪ Concrete Prefab segments lifted
by cranes
▪ Attached together by steel
reinf...
MODULAR HOUSES
▪ Full rooms or floors are just
ready for assembly
▪ Cranes assemble the house in
few days
▪ Advantages:
▪ ...
ADVANTAGES & DISADVANTAGES
BASIC CRITERIA
▪ Construction Time
▪ Construction Cost
▪ Quality
▪ Site Complexity
ADVANTAGES
Construction Time:
•Indoor Fabrication
•Independence of weather conditions
Construction Cost:
•Bulk orders
•Less Indirect Costs
•Fewer Labor
•Less holding costs
Quality:
•Ongoing Quality Surveillance
•Stable production Conditions
Site Complexity:
•Less overlapping activities
•Standard construction method
DISADVANTAGES
Construction Time
Construction Cost:
•Transportation Cost
•Professional Labor
•Heavy Duty Machinery
Quality:
•Consistency
•Untrained Labor
•Leakage
Site Complexity:
•Limited Working Areas
•Limited Transportation Routes
THANK YOU
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Explaining prefabrication in construction in a simple way. The contents range from steel framing, Precast concrete, Concrete prefab systems, sandwich paneling, timber framing and Real-life applications for prefabrication.

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Prefabrication types and Applications explained

  1. 1. PREFAB METHODS Presented by: 1. Eyad Reda 2. Ahmed Ezzat 3. Abdelrahman Alaa El Din 4. Hussam El Din Ayman 5. Omar Khaled Niemat 6. Mahmoud Omar
  2. 2. CONSTRUCTION PREFABRICATION ▪ Three main steps 1. Manufacturing components off-site (Factories or workshops) 2. Transport components to site 3. Assembly at needed positions OFF-SITE fabrication Transport to site Assemble
  3. 3. CONSTRUCTION PREFABRICATION ▪ IF divided according to type of materials used Prefab Timber framing Steel framing Sandwich paneling Concrete
  4. 4. CONSTRUCTION PREFAB ▪ Direct Applications of Prefab Skyscrapers Modular Houses Bridges
  5. 5. TIMBER WOOD FRAMING ▪ Box Frame ▪ Cruck Frame ▪ Aisled Frame
  6. 6. PANELIZED WOOD FRAMING ▪ All-wood panelized framing ▪ Hybrid panelized framing
  7. 7. SANDWICH PANELS ▪ Honeycomb sandwich panel ▪ Aluminum composite panel (ACP) The Earth’s Epcot Spaceship
  8. 8. CONCRETE
  9. 9. PRE-STRESSED CONCRETE ▪ How ? ▪ Pre-tensioned tendons instead of normal steel bars ▪ Allow concrete to withstand tension by friction ▪ Benefits: ▪ Longer spans ▪ Thinner slabs ((Cost-Saving)) ▪ Fewer joints between spans
  10. 10. PRECAST SLABS ▪ Solid Flat (Traditional) ▪ Hollow Core Flat ▪ High-rise, Bridges ▪ Lower cost, lower weight and fast assembly ▪ Single T ▪ Double T ▪ Up to 24 m span or more ▪ Flooring systems in garages, Bridges
  11. 11. PRECAST BUILDING SYSTEMS ▪ Large Panel System ▪ Large wall and floor panels ▪ BOX-like Rooms ▪ Horizontal and Vertical Joints ▪ Lift slab system with walls ▪ Precast Columns (Two stories High) ▪ Precast RC slabs joined by special joints to columns
  12. 12. PRECAST BUILDING SYSTEMS ▪ Frame System ▪ Beam-Column Junctions ▪ Corbels at columns for beams
  13. 13. STEEL FRAMING ▪ Super-structure Skeleton ▪ Vertical I-shaped Columns and Horizontal I-beams ▪ Rectangular grid supporting floors , walls…….etc. ▪ Cased by Fire-Resistant Coating or concrete layer ▪ Skyscrapers became possible
  14. 14. PREFABRICATION IN SKYSCRAPERS • You can think of using prefabricated materials in the building of skyscrapers as “ some LEGO® assembly” on an immense and monumental scale. • All prefab assemblies are transported to site and lifted by cranes to needed positions then joined by workers one by one.
  15. 15. PREFABRICATED SKYSCRAPERS • Mini Sky City: -57 stories. -19 atriums with 10 m tall each. -4,000 people working spaces. -800 households. ( Location : Changsha, China.)
  16. 16. MINI-SKY CITY
  17. 17. SEGMENTAL BRIDGES ▪ Support towers at sides ▪ Concrete Prefab segments lifted by cranes ▪ Attached together by steel reinforcements ▪ A popular example is ▪ Mike O'Callaghan–Pat Tillman Memorial Bridge
  18. 18. MODULAR HOUSES ▪ Full rooms or floors are just ready for assembly ▪ Cranes assemble the house in few days ▪ Advantages: ▪ Cost Saving ▪ Time-efficient ▪ Fewer Crews ▪ No site disturbance ▪ No weather delays
  19. 19. ADVANTAGES & DISADVANTAGES
  20. 20. BASIC CRITERIA ▪ Construction Time ▪ Construction Cost ▪ Quality ▪ Site Complexity
  21. 21. ADVANTAGES
  22. 22. Construction Time: •Indoor Fabrication •Independence of weather conditions
  23. 23. Construction Cost: •Bulk orders •Less Indirect Costs •Fewer Labor •Less holding costs
  24. 24. Quality: •Ongoing Quality Surveillance •Stable production Conditions
  25. 25. Site Complexity: •Less overlapping activities •Standard construction method
  26. 26. DISADVANTAGES
  27. 27. Construction Time Construction Cost: •Transportation Cost •Professional Labor •Heavy Duty Machinery
  28. 28. Quality: •Consistency •Untrained Labor •Leakage
  29. 29. Site Complexity: •Limited Working Areas •Limited Transportation Routes
  30. 30. THANK YOU
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Explaining prefabrication in construction in a simple way. The contents range from steel framing, Precast concrete, Concrete prefab systems, sandwich paneling, timber framing and Real-life applications for prefabrication.

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