Building Sem 2 (EMT 157)
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Transcript of Building Sem 2 (EMT 157)
EMT 157
EM2D
Faerina Mohd Nasir
Izzah Atira Dolmat
Nik Nur Fatin Najwa Nik Hassan
Nur Hasimah Mahamood
Mohamad Syahir Md Azam
Muhammad Ariff Khamzah
FOUNDATION
Definition
“A foundation is the base on which a building rests and its purpose is to safely transfer the
load of a building to a suitable subsoil”
Factors need to consider when choosing the type of foundation
The capacity of the subsoil
Cost involved
Total loads of the building
Type of loads of the buildingTotal loads of the building
DeadImposedWind
Factors need to consider when choosing the type of foundation
Cost involved
Total loads of the building
The capacity of the subsoil
The capacity of the subsoil
Wrong subsoil might cause movement of building
Wrong subsoil may release harmful material
An adequate depth can help retain the building position
Avoid shrinkage and sediment from soil
Types of Foundation
Shallow Foundation :
Strip
Raft
Deep Foundation :
Piling
Pad
Pad
Non cohesive soil
What kind of soil suitable for Pad foundation?
Non cohesive soil
A soil such as gravel or sand in which the particles do not stick together, as opposed to a sticky clay or claylike silt.
Pad
How does it look like?
• For buildings not more than 4 storey
• Made by using formwork
• Not for load bearing building
• Column stump is square shaped
• Usually made by concrete
• Transmit loads from column
• The more wider area, the more thicker the foundation
Characteristic of Pad Foundation
Site Visit
On the 23rd of March a survey has been done
• The site is for commercial building• This project under MRCB• For 8 months on August 2010 they started for soil investigation• For 2 months on February 2011 they started for site investigation• Now they are doing the process of foundation by steps• Two types of foundation use for the project
> Piling – for high rise building> Pad – for building less than 3 storey building
• Use reinforcement concrete• Concrete mix of 1:3:6
Process in making Pad Foundation
1. Clearing the site 2. Excavate : small excavation because pad foundation requires small size of space
Process in making Pad Foundation
3. Formwork for Padfilling
4. Install reinforcement : up to ground floor: extra reinforcement called
starter bar
Process in making Pad Foundation
5. Pour concrete into the Formwork :column stump
6. Let concrete cured then Earthbackfill
Process in making Pad Foundation
7. Place Formwork and installreinforcement for ground beam
8. Pour concrete then backfill slabbase and soil compaction
Advantages of Pad Foundation
Disadvantages of Pad Foundation
Shallow form of foundation needs little excavation
Shape can be designed to accommodate tight sites
Economic due to control of size
Can become very large if used for high point loads
Limited to dealing with point loads
Conclusions
Easy to make
More economical
The right types of foundation in the right types of subsoil will prevent from cracking
THANK YOU
It’s Q&A session