CPCCBC4004A: Estimating Materials Quantities for Building Projects

This assignment focuses on estimating materials quantities for a cottage construction project. It involves detailed calculations for various construction elements, including bored excavation, bulk excavation, ground slab concrete, reinforcing mesh, structural steel, plasterboard, skirting, and ceramic floor tiles. The solution provides itemized particulars, units, and quantities, along with allowances for wastage. The estimation process covers different aspects of the project, from foundation work to interior finishing, demonstrating a practical application of quantity surveying principles. The assignment does not include the unit prices and total cost of the materials, concentrating solely on the quantity takeoff process. The document uses a step-by-step approach, detailing how to measure and record quantities for each trade, ensuring accuracy and adherence to standard practices. The assignment also includes references to relevant sources and guidelines.

Estimating Materials Quantities for Building and Construction Projects 1
IDENTIFY AND PRODUCE ESTIMATED COSTS FOR BUILDING AND CONSTRUCTION
PROJECTS
Name
Course
Professor
University
City/state
Date

Estimating Materials Quantities for Building and Construction Projects 2
Identify and Produce Estimated Costs for Building and Construction Projects
This task involves describing, measuring and recording quantities of different trades for the
cottage project, including 10% wastage.
1. Bored excavation
Let spacing of piers be 1.8m (maximum allowable spacing between piers).
Total number of piers (considering that there is a pier at each corner of the building) = 53
Diameter of pier = 0.3m, depth of pier = 2.5m
Volume of pier = πr2 x h
Item Particulars Unit Qnty Rate ($) Cost ($)
1 Bored excavation for piers m3 9
π/0.152/2.5/53 9.37
2. Bulk excavation
Bulk excavation is done 1m beyond the external house walls and it does not include detailed
excavation. This is done by determining the bulk excavation for each ground floor room. Depth
of bulk excavation is 0.25m.
Item Particulars Unit Qnty Rate ($) Cost ($)
2 Bulk excavation m3 67
Family room
5.08/7.51/0.25 9.54
Kitchen, meals room, laundry, foyer, study,
living, dining, hallway and garage
13.87/14.83/0.25 51.42
Patio
2.67/8.35/0.25 5.57
66.53
The contours and elevations shown on the project drawings have revealed that the site is not
level. This means that some of the excavated material will be used as fill material. Since the
contours on the site are in the range of 0.05 and 0.3, the percentage of materials from bulk
excavation that will be used as fill material is 50%. Thus the volume of fill material is equal to:
50
100 x 67 m3=33.5m3

Estimating Materials Quantities for Building and Construction Projects 3
3. Ground slab N25 concrete
The concrete calculated here is that for ground slab, beams, patio slab, and pad footings.
Ground floor slab
Thickness of ground floor slab = 0.1m
Volume of ground floor slab concrete = length x width x depth
Beams
There are edge beams and internal beams.
Depth of edge beams = 0.42m
Depth of internal beams = 0.35m
Volume of beams concrete = width x depth x length x no. of beams
Patio slab
Thickness of patio slab = 0.1m
Volume of patio slab concrete = length x width x depth
Pad footings
Depth of pad footings = 0.45m
No. of pad footings = 2
Volume of patio footings concrete = length x width x depth x no.
Item Particulars Unit Qnty Rate ($) Cost ($)
3 N25 concrete m3 35
Ground slab m3 19
Family room
4.08/5.51/0.1 2.25
Kitchen, meals room, laundry, foyer, study, living,
dining, hallway and garage
11.87/12.83/0.1 15.23
17.48
Allow 10% wastage
0.1/17.48 1.75
19.23
Beams m3 14
Edge beams
0.45/0.42/10.82/1 2.04

Estimating Materials Quantities for Building and Construction Projects 4
0.45/0.42//12.83/2 4.85
0.45/0.42/10.97/1 2.07
8.96
Internal beams
0.45/0.35/10.97/1 1.73
0.35/0.35/11.48/1 1.41
0.45/0.35/4.61/1 0.73
3.87
12.83
Allow 10% wastage
0.1/12.83 1.28
14.11
Patio slab m3 1
1.32/0.59/0.1 0.08
5.17/1.67/0.1 0.86
1.32/0.24/0.1 0.03
1.08/0.35/0.1 0.04
1.01
Allow 10% wastage
0.1/1.01 0.10
1.11
Pad footings m3 1
1.2/0.9/0.45/2 0.97
Allow 10% wastage
0.1/0.97 0.10
1.07
4. Ground slabs SL72 reinforcing mesh
The first step is to determine the net ground area of family, kitchen, meals room, laundry, foyer,
study, living, dining, hallway, garage and patio.
Effective cover area per SL72 reinforcing mesh sheet = 5.8m x 2.2m = 12.76m2
Item Particulars Unit Qnty Rate ($) Cost ($)
4 SL72 reinforcing mesh
4.1 Net measure of ground floor slab
reinforcing mesh
m2 204
Family
4.08/5.51 22.48
Kitchen, meals room, laundry, foyer, study,

Estimating Materials Quantities for Building and Construction Projects 5
living, dining, hallway and garage
11.87/12.83 152.29
Patio slab
1.67/6.35 10.60
185.37
Allow 10% wastage
0.1/185.37 18.54
203.91
4.2 Number of SL72 reinforcing mesh sheets no 16
Number of sheets
204(5.8/2.2) 15.99
5. Ground slab SL12TM
There are external and internal trenches for the ground floor beams. Therefore the first step is to
determine the total length of external and internal trenches of the building. The total length of
trenches is calculated as follows:
Total length of trench = length of trench x no. of similar trenches
Item Particulars Unit Qnty Rate ($) Cost ($)
5 Groundfloor slab SL12TM
Length m 107
11.87/3 35.61
12.83/3 38.49
4.08/2 8.16
5.51 5.51
6.35 6.35
1.67/2 3.34
97.46
Allow 10% wastage
0.1/97.46 9.75
107.21
Number of SL12TM 6m lengths no 18
107(6) 17.83
6. Structural steel
There are main structural steel bars and distribution structural steel bars. The main bars run along
the length of the slab while the distribution bars run along the width of the lab. In this scenario,
the specifications/configurations of the main steel bars and distribution steel bars are the same.

Estimating Materials Quantities for Building and Construction Projects 6
Therefore the main task here is to determine the length of main steel bars and distribution steel
bars required for each room on the ground floor.
No . of main structural steel bars= Width of room
Spacing of main structural steel bars +1
No . of distribution structural steel bars= Length of room
Spacing of distribution structural steel bars +1
Total length of structural steel bars = length of structural steel bars x no. of structural steel bars
Spacing of main structural steel bars = 150mm
Spacing of distribution structural steel bars = 200mm
The no. of bars is multiplied by 2 because of there are top and bottom steel bars.
No. of main and distribution bars
Family room
No . of main bars= 4.08
0.15 +1=29 x 2=5 8
No . of distribution bars= 5.51
0.2 +1=29 x 2=58
Kitchen, meals room, laundry, foyer, study, living, dining, hallway and garage rooms
No . of main bars= 11.87
0.15 +1=81 x 2=162
No . of distributionbars= 12. 83
0.2 +1=66 x 2=132
Patio
No . of main bars= 6.35
0.15 +1=44 x 2=88
No . of distributionbars= 1.67
0.2 +1=10 x 2=20
As aforementioned, the specifications of main and distribution steel bars are the same. The
suggested diameter of the steel bars is 12mm hence the weight of structural steel per meter is
890g = 0.89kg = 0.00089 tonnes (Arjun, 2019).
Total weight of structural steel bars = 0.00089 t x total length of structural steel bars needed for
the ground floor slab.

Estimating Materials Quantities for Building and Construction Projects 7
Item Particulars Unit Qnty Rate
($)
Cost
($)
6 Structural steel length m 4923
Main steel bars length m 2545
Family room
5.51/58 319.58
Kitchen, meals room, laundry, foyer, study,
living, dining, hallway and garage
12.83/162 2078.46
Patio
1.67/88 146.96
2545
Distribution steel bars length m 1930
Family room
4.08/58 236.64
Kitchen, meals room, laundry, foyer, study,
living, dining, hallway and garage
11.87/132 1566.84
Patio
6.35/20 127
1930.48
4475.00
Allow 10% wastage
0.1/4475 447.5
4922.50
Weight of all structural steel bars t 4.38
0.00089/4923 4.38
7. Plasterboard
The first step is to determine the total length of internal walls for each of the first floor rooms
and multiplying it by the floor-ceiling height of the rooms (2.45m). Patio has half-wall of 1.23m.
The suggested standard length of plasterboard sheets is 1.2m.
Item Particulars Unit Qnty Rate ($) Cost ($)
7.1 Net measure of first floor internal walls
plasterboard
m2 244
Bed 2
14.35/2.45 35.16
Bed 1

Estimating Materials Quantities for Building and Construction Projects 8
15.85/2.45 38.83
Bed 3
12.5/2.45 30.61
Gallery
6.05/2.45 14.82
Void
4.75/2.45 11.64
Bed 4
13.60/2.45 33.32
Rumpus
12.30/2.45 30.14
Patio
15.10/1.23 18.57
Hallway
3.5/2.45 8.58
221.67
Allow wastage factor of 0.1
0.1/221.67 22.17
243.84
7.2 No. of 2400mmx1.2m plasterboard sheets no 85
244(2.4/1.2) 84.72
8. 66x18mm finished DAR primed pine skirting
The first step is to determine the total length of skirting required for the first floor rooms. The
skirting is in all first floor rooms.
The suggested length of the skirting is 2.7m
Item Particulars Unit Qnty Rate ($) Cost ($)
8 Skirting length m 123
Bed 2
14.35 14.35
Bed 1
15.85 15.85
Bed 3
12.5 12.5
Gallery
6.05 6.05
Void
4.75 4.75

Estimating Materials Quantities for Building and Construction Projects 9
Bed 4
13.60 13.60
Rumpus
12.30 12.30
Patio
15.10 15.10
Hallway
3.5 3.5
Balcony
13.08 13.08
111.08
Allow 10% wastage
0.1/111.08 11.11
122.19
No. of 66x18mmx2.7m DAR pine skirting no 46
123(2.7) 45.56
9. Ceramic floor tiles
Floor tile area = length of room x width of room
The recommended tiles are 12'x12' (0.30mx0.30) because of their lower wastage factor.
Item Particulars Unit Qnty Rate ($) Cost ($)
9 Floor tiles area m2 82
Family room
5.03 x 4.08 20.52
Meals room
4.59 x 2.54 11.66
Kitchen
5.76 x 4.59 26.44
Foyer/stair area
Foyer
1.71 x 5.4 9.23
Stair
3.16 x 2.09 6.60
15.83
74.45
Allow 10% wastage
0.1/74.45 7.45
81.90

Estimating Materials Quantities for Building and Construction Projects 10
No. of tiles no 912
82(0.3/0.3) 911.11
This task only involved estimating the materials quantities of the specified works. Therefore the
unit prices and total cost of the materials have not been determined in this task.
References
Arjun, N., 2019. How to calculate weight of steel bars?. [Online]
Available at: https://theconstructor.org/construction/calculate-weight-steel-bars/34544/
[Accessed 30 September 2019].

Estimating Materials Quantities for Building and Construction Projects 11