Early Start Dates for Desklib Construction Project

This article provides an overview of the preliminary costs for Desklib's construction project with early start dates. It includes consultant fees, authorities fees, demolition and site clearing, scaffolding, protections of facilities and accommodation, site fence/hoarding, rubbish removal, traffic control, direct site labour, temporary services, builder's margin, groundwork, concrete, metal work, waterproofing, ceramic tiling, and plasterboard. The article also includes the subject, course code, course name, and college/university if mentioned.

Q2)
EARLY START DATES
Preliminaries
Item Particulars Unit Quantity Rate Total
cost
1 1. Consultant fee
2. Authorities fees incl DA, CC,
inspections, LSL Levy and
contributions
3. Demolition and site clearing
4. Home warrant insurance
Appliance Protection Plan = 4
Appliance Service Contract = 2
Home Maintenance Plan = 1
Home Protection Plan = 3
Home Appliance Insurance = 3
Appliance Repair Service = 5
Supply (PC) $2,500
5. Contractors risk insuarance
Fire, lightning, explosion = 1.0 M
Landslide, subsidence and rockslide = 1.0 M
Burglary and theft = 1.0 M
Collapse, damage due to foreign objects,
impact damages = 1.0
Supply (PC) = 0.5% of the
total amount
Item
Item
Item
No
%
M2
1
1
1
16
4.0 M
1850
$50,000
$112,000
$10,000
$2,500
0.005
$45
$50,000
$112,000
$10,000
$40,000
$20,000

6. Scaffolding
Baker staging
Length = 1.8 m
Width = 0.74 m
Area = 1.332 m2
Number of scaffold = 1389 pieces
Total area = 1850 m2
Supply (PC) = $30
Labour 3.0 hrs @ $5/hr = $15
$45
7. Protections of facilities and
accommodation
8. Site fence/hoarding
Length of area to be fence = 16.5 m
Width of area to be fence = 16.0 m
Total perimeter = 2(length + width)
= 2(16.5 m + 16.0)
= 65 m
Supply of 65mm fence = $10
Labour 1.00 m @ $5/m = $5
$15
9. Rubbish removal
Labour 10.0 m2 @ $500/m2 = $5000
10. Traffic control
11. Direct site labour
Digging trenches = 1.0 M
Laying foundations = 1.0 M
Building walls = 1.0 M
Plastering = 0.5 M
Fitting windows = 0.5 M
Supply (PC) = 7.5% of the
total
Item
M
Item
Item
%
Item
65
1
1
4.0 M
1
4.0 M
15
$5,000
$1,000
0.075
$3,000
0.075
$83250
$10,500
$1,000
$5,000
$1,000
$300,000
$3,000

12. Temporary services
13. Builder’s margin
Cost of goods sold $3.7 M.
Revenue $4.0 M.
Calculate the gross profit by
subtracting costs from revenue. $4.0
M - $3.7 M = $0.3 M
Divide gross profit by revenue: $0.3
M / $4.0 M = 0.075 .
percentages: 0.075 * 100 = 7.5%
%
$300,000
Total $935,750
Summary
All preliminary will be considered all on the start dates

Groundwork
Bulk excavation for general site preparation
Ite
m
Particulars Unit Quantity Rate $ Cost
2 Bulk excavation m3 150 $1000 $150,000
Overall bulk area of excavation (plus working
space) = (12.83 + 4.08 + 2.00) x (11.87 +
2.00)
= 18.91 x 13.87 = 262.28
Estimated depths at corners: NE – 0.69m,
NW - 0.55m, SE – 0.50 and SW – 0.45)
Average depth = (0.690 + 0.54 + 0.45 +
0.40)/4 = 0.55m
Volume of bulk excavation = area x depth
= 262.28m2 x 0.55m = 144.25
Assume that only one side is battered =
18.91m x 1.0m wide x 0.55m = 10.40m3
Since battering is done at 45 degrees, battered
volume is = 0.5 x 10.40 = 5.20
Total volume of bulk excavation = 144.25 +
5.20 = 149.45
Summary:

The initial volume of 150m3 shall be excavated from the site during general preparation of the
site. This bulk volume includes working space, which extends outside the building towards the
boundary by 1m. The longest side of the building shall also be battered at an angle of 45 degrees
and a width of 1m from the building. The total bulk volume of 150m3 to be excavated includes
the actual site of the house, working space and battered volume. The subcontractor has to use this
value to determine the most suitable equipment to use for bulk excavation and if the excavated
material will have to be cart away
Concrete
N25 concrete for the ground slab (beams, patio slab and pad footings
Item Particulars Unit Quantit
y
Rate $ C
3 N25 Concrete for ground slab m3
Slab on ground = length x width x slab
thickness
= 12.83m x 11.87m x 0.15m = 22.84
m3 23
Patio slab = length x width x thickness
= 6.35m x 1.67m x 0.15m = 1.59
m3 2
Family room = length x width x thickness
= 5.51m x 4.08m x 0.15m = 3.37
m3 4
Beams on slab = total length of beams x
width of beam x depth of beam
= 82.82m x 0.1m x 0.45m = 3.73
m3 4
Pad Footings
Area = 10(1.2 x 0.9) + (0.35 x 2.4)
= 10.80 + 0.84 = 11.64m2
Volume = area x depth
= 11.64 x 0.35 = 4.074
m3 5
Total m3 38 $20,000 $760,000

Summary:
The initial total volume of 38m3 of N25 concrete shall be required for the ground slab, including
beams, patio slab and pad footings but excluding piers. Depending on the mix design
recommended by the engineer, it noes becomes easier to determine the volume of concrete
ingredients (concrete, coarse and fine aggregates and sand) needed for the ground slab.
Metal work
Ite
m
Particulars Unit Quantity Rate $ C
6 Structural steel tonnes 1.78 $30,000 $53,400
B1
Weight = 25.7kg/m x 12.83m = 329.73kg
B2
Weight = 32kg/m x 12.83m = 410.56kg
B3
Weight = 14kg/m x 11.87m = 166.18kg
B4
Weight = 14kg/m x 11.87m = 166.18kg
B6
Weight = 14kg/m x 11.87m = 166.18kg
B5
Weight = 31.6kg/m x 12.83m = 405.43kg
L1
Weight = 14.6kg/m x 4.08m = 59.57kg
L2
Weight = 14.6kg/m x 5.51m = 80.45kg
Total weight = 329.73 + 410.56 + 166.18 +
166.18 + 166.18 + 405.43 + 59.57 + 80.45 =
1784.28kg

Summary:
The total weight of structural steel needed for the project is 1.78 tonnes.
Waterproofing
Item Particulars Unit Quantity Rate Amount
Wall covering
Vertical covering including insulation and
Vapour barrier; to masonry
Wall covering of bathroom
= 2(4.59m x 1.8m) + 2(6.11m x 1.8m) =
38.52m2
Wall covering of laundry
= 2(4.59m x 1.8m) + 2(6.11m x 1.8m) =
38.52m2
Wall covering of powder room
= 2(4.59m x 1.8m) + 2(6.11m x 1.8m) =
38.52m2
Wall covering of ensuite
= 2(4.59m x 1.8m) + 2(6.11m x 1.8m) =
38.52m2
Total area = 38.52 m2 *4 = 154.08 m2
Supply (PC) = $30
Labour Labour 5.00 m2 @ $50/m2 = $250
$280
m2 154 $50 $7,700
Horizontal edge detail
Junction between floor and wall coverings;
forming external angle
Floor of bathroom: 4.59m x 6.11m =
28.04 m2
Floor of ensuite: 4.59m x 6.11m =
m2 112 $50 $5,600

28.04 m2
Floor of laundry: 4.59m x 6.11m =
28.04 m2
Floor of powder room: 4.59m x 6.11m =
28.04 m2
Total area 28.04 m2 *4 = 112.16 m2
Supply (PC) = $30
Labour Labour 5.00 m2 @ $50/m2 = $250
$280
Total $13,300
Hydraulics
Ite
m
Particulars Unit Quantity Rate Total
cost
4 Hydraulic services incl. sewer, sanitary,
hot and cold water reticulation,
stormwater, gas and roof plumbing
NO 16 $7,500 $120,000
Total $120,000
Ceramic tiler
Item Particulars Unit Quantity Rate $ C
4 Ceramic floor tiles
4(a) Amount of ceramic floor tiles
Family room = 4.08m x 5.51m = 22.48m2
m2 115 $500 $57,500

Plus 10% wastage = 1.10 x 22.48m2 =
24.73m2 ≈ 25m2
Meals room = 2.43m x 4.68m = 11.37m2
Plus 10% wastage = 1.10 x 11.37m2 =
12.51m2 ≈ 13m2
Kitchen
Floor tiles: 4.59m x 6.11m = 28.04m2
Plus 10% wastage = 1.10 x 28.04m2 =
30.85m2
Wall tiles (under cupboards) = 2(4.59m x
1.8m) + 2(6.11m x 1.8m) = 38.52m2
Plus 10% wastage = 1.10 x 38.52m2 =
42.37m2
Total kitchen = 30.85 + 42.37 = 73.22m2 ≈
74m2
Foyer/stair area = 1.71m x 1.09m = 1.86m2
Plus 10% wastage = 1.10 x 1.86m2 = 2.05m2
≈ 3m2
Total = 25 + 13 + 74 + 3 = 115
4 (b)
(i)
Number of boxes of floor tiles
Number of boxes of floor tiles = area of floor
tiles/1.2m2 = (25 + 13 + 31 + 3)/1.2 =
72m2/1.2m2 = 60
No 60
4 (b)
(ii)
Number of boxes of wall tiles
Number of wall tiles = area of wall
tiles/1.4m2 = 43m2/1.4m2 = 30.71
No 31
Summary:

The initial area to be covered will be 115m2 (including family room, meals room, kitchen and
foyer/stair area) shall be tiled. 60 boxes of floor tiles and 31 boxes of wall tiles shall be required
for the project.
Plasterboard
Item Particulars Unit Quantity Rate $ C
5 Plasterboard
5(a) Area of plasterboard
Assume that the height of plasterboard wall is
2.4m
Area of wall = length of wall x height of wall
A1 = 11.93m x 2.4m = 28.63m2
A2 = 11.93m x 2.4m = 28.63m2
A3 = 11.93m x 2.4m = 28.63m2
A4 = 11.93m x 2.4m = 28.63m2
A5 = 10.97m x 2.4m = 26.33m2
A6 = 10.97m x 2.4m = 26.33m2
A7 = 10.97m x 2.4m = 26.33m2
A8 = 10.97m x 2.4m = 26.33m2
A9 = 3.63m x 2.4m = 8.71m2
A10 = 3.63m x 2.4m = 8.71m2
A11 = 4.61m x 2.4m = 11.06m2
A12 = 4.61m x 2.4m = 11.06m2
Total area of walls = 4(28.63) + 4(26.33) +
2(8.71) + 2(11.06) = 259.38m2
Deduct area of doors and windows
Total area of doors = 5(2m x 0.9m) = 9.00m2
Area of windows = 6(1.2m x 0.8m) = 5.76m2
Total area of doors and windows = 9.00 +
5.76 = 14.76m2
m2 245 $100 $24,500

Net measure = 259.38 – 14.76 = 244.62m2
(b) Number of plasterboard sheets
The selected size of plasterboard sheets is
1200mm wide and 2400mm long
Area of one plasterboard sheet = 1.2m x 2.4m
= 2.88m2
Number of sheets = net measure of wall/area
of one sheet
= 245m2/2.88m2 =85.07
No 86
Summary:
The initial area of wall that will be covered with plasterboard is 245m2 and a total of 86
plasterboard sheets measuring 1200mm wide and 2400mm long shall be required for the project.
Carpet
Item Particulars Unit Quantity Rate Total
cost
5 Carpet to units and common areas No 16 2,400 $38,400

Total $38,400
Cleaner
Item Particulars Unit Quantity Rate Total
cost
6 Cleaner to initial clean units and common
areas
No 16 $150 $2,400
Total $2,400
External work
Item Particulars Unit Quantity Rate Total
cost
7 Boundary fences
Gates
Landscaping to planter boxes and common
areas
Make good crossing and roadway
Item
Item
Item
Item
$10,000
$3,000
$10,000
5000
Total $28,000
Painter
Item Particulars Unit Quantity Rate Total
cost

8
Painting to all internal areas incl. unit and
common areas based on unit numbers
No 16 3500 $56,000
Total $56,000
PC item
Item Particulars Unit Quantity Rate Amount
Wooden doors
Bathroom
Single Wooden door D1, with an overall dimensions of
3.0 m x1.5 m. = 4.5 m2
Laundry
Single Wooden door D1, with an overall dimensions of
3.0 m x1.5 m. = 4.5 m2
Ensuite
Single Wooden door D1, with an overall dimensions of
3.0 m x1.5 m. = 4.5 m2
Powder room
Single Wooden door D1, with an overall dimensions of
3.0 m x1.5 m. = 4.5 m2
Total area = 4.5 m2 * 4 = 18.0 m2
Supply (PC) = $30
Labour Labour 5.00 m2 @ $50/m2 = $250
$280
m2 18 $280 $43,120
Hinges
Number = 2
Pairs 2 $20 $40

Supply (PC) = $10
Labour 2 number @ $5/number = $10
$20
Laundry cupboard shelves
Dimension
4.0 m * 1 .0 m = 4.0 m2
Number of shelves = 5
Total area = 5 * 4.0 m2 = 20.0 m2
Supply (PC) = $15
Labour Labour 300 m2 @ $50/m2 = $15
$280
m2 20 $30 $600
Install fittings (TPH’s, robe hooks, rails)
Rails
Length 15 m
Number of robe hooks 40
Supply (PC) = $5
Labour = $15
$20
m 15 $20 $300
Total $44060
Roofers
Item Particulars Unit Quantit
y
Rate Total
cost
9 S&F metal roofing incl. sarking & flashing Item 1 $29,100 $29,100
Total $29,100
Mechanical

Item Particulars Unit Quantit
y
Rate Total
cost
10 Supply and install hydraulic lift Item 1 $110,000 $110,000
Total $110,000
Electrical
Item Particulars Unit Quantity Rate Total
cost
11 Electrical incl. wiring, switches, sub-boards,
cable tv, antenna and connections
No 16 4500 $72,000
Total $72,000
Masonry
Item Particulars Unit Quantity Rate Total
cost
12 Temporary services Items $418,500
Total $418,500
Take the duration of Early Start to be one month for each project activities

ACTIVITY PREDECESSOR DURATION COST
Preliminaries
(A) (A)
- 1 $935,750
Groundwork
(B)
A 1 $150,000
Concrete (C) B 1 $760,000
Masonry (D) C 1 $418,500
Metalwork (E) C 1 $53,400
Hydraulics
(F)
D 1 $120,000
Electrical (G) E 1 $72,000
Mechanical
(H)
F 1 $110,000
Waterproofing
(I)
B 1 $13,300
PC Items
(J)
G 1 $44,060
Roofer (K) B 1 $29,100
Plasterer (L) H 1 $24,500
painter (M) I 1 $56,000
Ceramic tiler J 1 $57,500
Carpet K 1 $38,400
Cleaner L 1 $2,400
External work M,B 20 $28,000
NB: For S – curve Check the excel file