Week 3 Lecture
Presented by Dr Chethana Illankoon
Outline
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Filling Only
Cut and Fill
Assessment
Substructure - Introduction
Let’s look into the process
Site
preparation
Tree
removal or
retention
Top soil
removal
Surface
excavation
/ filling
Detailed
excavation
Activity 2 How to record it?
Formation Level or Bench level
Once we know the FFL and the details of
other layers we can calculate the
Formation levels
5
Activity 1
Option 2: Fill Only
Activity 1
7
Activity 2
Take off quantities
for surface
excavation
8
Activity 2
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Step 1 : Calculate the Formation Level
Step 2 : Calculate the average level of the site
Step 3 : Calculate the average fill
Step 4 : Calculate the filling area and volume
Activity 2 :Step 1 : Calculate the Formation
Level
• FFL : 17.725 (from the given Architectural Drawing)
• Formation Level
Calculation
Explanation
FFL
17.725
Deduct : Slab thickness
-0.200
Slab thickness is given in structural drawings.
However, it is not provided here. So we
assumed it as 200mm
Deduct : Sand Blinding
-0.050
Assumed as 50mm
Formation level
17.475
Activity 2 :Step 2 : Calculate the average
level of site
Let’s have a closer
look at the drawings
and identify the spot
levels
Activity 2 :Step 2 : Calculate the average
level of the site
Top left corner
18.000
Top right corner
17.450
Bottom left corner
15.710
Bottom right corner
15.700
Average site level
(18.000+17.450+15.710+15.150)/4 = 16.715
Average level of site after adjusting for top
soil (Assumed top soil is 150mm)
16.715 + 0.150 = 16.865
Activity 2 :Step 3 : Calculate the average
depth of excavation
Average level of site after adjusting for top
soil (Assumed top soil is 150mm) – Step 2
16.865
Formation level (Step 1)
17.475
Depth of fill
17.475- 16. 865 = 0.610
Activity 2 :Step 3 : Calculate the excavation
area and volume
Filling area
(42.00 X 18.00) + (7.50 x 4.00) = 786.00m2
Depth of fill (Step 3)
0.610m
Filling Volume
786.00 x 0.610 = 479.46m3
Activity 2: How to record it?
Activity 2: How to record it?
Activity 2 :How to record it?
Item
Description
Unit
Quantity
1
Filling over-site to makeup levels (786m2)
m3
479.46
2
Surface preparation for oversite filling
m2
786.00
This is for your reference only. We will discuss on how to record this in CostX
Option 3 – Cut and fill
Activity 2
Option 3: Cut and fill
Activity 2
Plan for the learning
centre.
Assume that the slab
thickness is 100mm
20
Activity 2
Contour details for the
learning centre
21
Activity 2 :Calculation
Top
Bottom Bottom
Top Left Right
Left
Right
Average
site level FFL
Location hand
hand
hand
Hand
L2
21.90
21.79
21.5
21.42
COLA
21.50
21.42
20.97
20.80
These Levels were assumed
Slab and
sand
blinding
(100mm
+50mm)
Formation
Level
Cut/Fill depth
(Average site
level Formation
level)
Cut/Fill depth
Activity 2 :Calculation
Slab and
Cut/Fill depth
sand
(Average site
Top
Bottom Bottom
blinding
level Top Left Right
Left
Right
Average
(100mm
Formation Formation
site level FFL
Level
Location hand
hand
hand
Hand
+50mm)
level)
Cut/Fill depth
L2
21.90
21.79
21.5
21.42
21.65
21.60
-0.15
21.45
0.20 Cut
COLA
21.50
21.42
20.97
20.80
21.17
21.60
-0.15
21.45
-0.28 Fill
These Levels were assumed
This is for your reference only. We will discuss on how to record this in CostX
during Week 3 tutorial
Activity 2 :Calculation
Adjstment
to top soil Adjstment
for cut
to top soil
Cut
Fill (deduct
for fill (Add
Cut
Fill
Location depth
depth 150mm)
150mm)
Area
Volume Volume
L2
0.20
0.05
143.55
7.18
COLA
0.28
0.43
46.85
20.15
This is for your reference only. We will discuss on how to record this in CostX
during Week 3 tutorial
Activity 2 :How to record it?
Item
Description
Unit
Quantity
1
Surface excavation to reduce levels
(144m2)
m3
7.18
2
Surface preparation for excavated
surfaces
m2
144.00
3
Filling over-site to makeup levels with
imported material (47m2)
m3
20.15
2
Surface preparation for oversite filling
m2
47
*Builders may consider using the excavated material. Total volume is not
imported
This is for your reference only. We will discuss on how to record this in CostX
Accuracy
• Many assumptions – determining the spot levels
• Less Accurate
• Minus figures when the top soil adjustment is done
(Excavation)
• Methods used to accurately calculate the spot levels –
Interpolation
• Software used – Mudshark
• Time consuming!
Assessment – Site works: Site
preparation
1.
2.
3.
4.
5.
Site clearance
Top soil removal
Tree removal or retention – if any
Disposal of excavated material – top soil
Cut/Fill
a)
b)
c)
d)
e)
Surface excavation – if any
Surface preparation for excavated surfaces – if any
Filling oversite – if any
Surface preparation for filled surfaces – if any
Disposal – if any
Assesment
Major Assessment
• 4-5 Members in a group
• Select 2 elements and take off quantities
Major Assessment
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Introduction – type of project, type of units, finishes, areas etc.
Major Assessment
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Elemental Summary and trade detailed report – generated from CostX
Limitations in CostX – Number of lines
List of Assumptions – Discrepancies, Details not available (Eg Spot
levels you assume)
Major Assessment
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Cost X file
There will be different links to submit
Create Dimension groups, proper format
Follow the tutorial sessions
Major Assessment
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Two files to be submitted
One PDF and CostX file
Major Assessment
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After each element, we will discuss on the list of items that you are
required to measure
Refer the Tutorials
Assessment Support tab
• List of items
• Support videos for Cost X
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It is time to start the Assessment
Major Assessment – Individual component
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Worth of 20 Marks
Based on the Assessment drawings and details
If you contribute to the group assessment - Easy
Substructure
Let’s look into the process
Site
preparation
Tree
removal or
retention
Top soil
removal
Surface
excavation
/ filling
Detailed
excavation
Substructure
• Transfer the load to the ground
• Various types of foundations
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Shallow foundations
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Pad footings
Strip footings
Raft Foundations (Slab on ground, Stiffened raft, Waffle raft/waffle pod)
Deep foundations (not discussed)
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Piles
Types of Shallow Foundations
PAD FOOTINGS
STRIP FOOTING
Types of Shallow Foundations
SLAB ON GROUND
WAFFEL
What is the process?
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Excavation
Surface preparation – if required
Disposal of excavated material
Sand blinding before pouring the concrete
Concrete
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Reinforcement
Formwork (if required)
• Working space allowance
• Waterproof Membrane
Sections in ANZSMM
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Excavation - Groundworks
Surface preparation – if required - Groundworks
Disposal of excavated material Groundworks
Sand blinding before pouring the concrete – Groundworks (Filling)
Concrete - Concrete
Reinforcement - Reinforcement
Formwork (if required) - Formwork
Working space allowance - Groundworks
Waterproof Membrane – Tanking and waterproof membranes
Definition in the Australian Cost
Management Manual
Definition in the Australian Cost
Management Manual
Questions?