Transcript Quantity Take Off

Applied Science University
Quantity Take Off
Dr. Ayman A. Abu Hammad
Topical Overview
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Chapter 1: Site Preparation
Chapter 2: Soil and Site Exploration
Chapter 3: Excavation
Chapter 4: Foundations Work
Chapter 5: Wood Formwork
Chapter 6: Steel Rebar
Chapter 7: Concrete
Chapter 8: Building structures
Chapter 9: Walls Construction
Chapter 10: Brick Works
Chapter 11: Masonry (Stone)
Chapter 12: Stair Wells
Foundations rebar fabrication
Letter of intent
Planning:
Schedule
Project team
Subcontractors
Suppliers
Submittals
workforce
Site electricity,
access roads,
phone line,
water, heat
Cars
Notice to
proceed
Excavation:
1- Bulk Exc.
2- Trimming
RC
foundations
forms- rebar
Dismantle
slab 1 forms
Retaining
Walls, fence
2- Weeks
Floor X
Masonry
Slab # 1 cast
Slab # 1
forms- rebar
Cast column
& walls
RC walls:
forms-rebar
cast
Tile
Civil Works
Foundations
RC cast
Found. Wall
forms- rebar
Side walks
Plaster
Paint
Blinding
forms- cast
Columns
forms- rebar
E&M rough
Doors-wind.
Foundations
center lines
2-3-4…
Finishing
Partition
walls- block
work
Mobilization:
Site offices
Off. furniture
Computer, phone,
Workers residence
Cement-agg.-rebar
Sto.
Tools & equip.
Security fence
Found. wall
cast
Compacted
backfill
Floor on
grade: rebarcast
Rebar Take-off Rules
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Steel diameters are:
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Rebar Standard Lengths are:
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4, 5, 6, 7, 12m.
Overlap standard distance is= 40*max Diameter for tension, 50*max Diameter for
compression.
Cover distance = 0.005m in foundations only and 0.025m otherwise.
Stirrup key is 0.1 *2= 0.2m
Rebar order format is as follows:
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8, 10, 12, 14, 16, 18mm….
Calculated Number Ø Standard Diameter/ Standard Length
Rebar volume is negligible in concrete quantity take-off.
AGGREGATE REBAR DATA FOR SIMILAR DIAMETERS AND LENGTHS ONLY!
FOR TONNAGE ESTIMATION MULTIPLY THE NUMBER BY THE LENGTH BY THE
UNIT WEIGHT OF BAR.
SHOULD TRANSLATE TAKE-OFF NUMBERS ON THE A-CADS.
Rebar Steps:
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Foundations: Strip, Isolated, Tie beams, FW
Floors, Columns, Walls, Retaining Walls, lintels
Slabs: P Beams, S Beams, Double Rib, Wall Beams, Ribs
4 D12mm/1m
Wall height=3m
5 D14mm/1m
5D16mm/1m
0.35m
0.4m 0.25m
7 D14mm/1m
3.5m
4.8m
0.25m 0.4m
3.5mx4.5mx3m interior dim.
Overlap=40*max diam.= 0.64m
Reservoir
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Foundation:
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Stirrups:
[(4.8-0.05)*2]+[(0.35-0.05)*2]+0.2= 10.3m
Res. Length=4.5+0.65+0.65=5.8m
[5.8*5]+1= 29 +1=30 stirrup
30D16/5m+30D16/6m
Longitudinal:
6m
• Top bars= 4.8*7= 34 bar, length= 4.5+0.65+0.65=5.8m 6m
• 68D14/6m
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Walls:
– Vertical:
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length= 2.95m+0.35+0.20= 3.5m
Wall perimeter={2*(3.5+[0.25 C-C])}+{2*(4.5+[0.25C-C])}= 17m
Number of longitudinal bars= 17m*8bars per meter= 136 bar
136D12/7m
– Longitudinal:
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Short wall length= 3.5+(0.25*2)= 4m
Long wall length= 4.5+(0.25*2)= 5m
Number of longitudinal bars= 3m*10*2= 60
120D14/4m
120D14/5m
5m
0.64
Concrete for Water Reservoir
Concrete of Foundations
L
W
H
volume
Water reservoir
Blinding
5.0
6.0
0.1
3.0
RC
4.8
5.8
0.35
9.7
17.0
0.3
3.0
12.8
Walls
Rebar of foundation
w ater reserv
LengthCount
foundation stirrups
10.3 6m
29.0 29Q16/6
5m
29.0 29Q16/5
foundation longitudinal12.3 6m
34.0 34Q14/6
7m
34.0 34Q14/7
Walls vertical rebar 17.00 3.65
Wall longitudinal rebar
136 136Q12/4
4m
60 60Q14/4
5m
60 60Q14/5
68Q12/7
Isolated Foundation
2.5m*3m*0.45m &
Column0.25m*0.6m. FWH=1.3m
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Stirrups:
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Longitudinal:
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(2*[(2.5-0.05)+(0.45-0.05)])+0.2=
5.9m6m
Number of stirrups= 3m*5stirrups
per meter= 15+1=16
16D16/6m
(2*[(3.00-0.05)+(0.450.05)*2])+0.2= 6.9m7m
Number of stirrups=
2.5m*7stirrups per meter= 18
17D14/7m
Column C1:
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Column Dowels:
length=1.3+0.45+0.3+(overlap=40
*16mm=0.65m)= 2.70m 3m
8D16mm/3m 4D16mm/6m
C1 above FL= 3.12(12 stones
height)+0.3(slab)+0.64(overlap)=
4m
8D16/4m
0.65 overlap
8D16mm
Wall height=1.3m
7D8mm/1m
5D16mm/1m
0.45m
7 D14mm/1m
1.125m 0.25m 1.125m
2.5m
Civil Drawings (Foundations Drawings)
A
1
Civil Drawings (Foundations Drawings)
A
1
TB
TB
f1c1
f1c1
TB
TB
TB
TB
A
Civil9.5Drawings (Foundations
6
S1-1
Drawings)
1
4.00
S1-1
7 S2-2
3
TB
TB
TB
f1c1
3.5
S2-2
f1c1
4.6
3.5
TB
TB
3
3
6
S1-1
5
5
9.50
S1-1
TB
4
S2-2
TB
4
S3-3
S2-2
TB
5
S3-3
7
S2-2
13m
7
5
3.7
5m
Strip Footings
0.2
0.3
5Q12/1m
6*16mm/1m
0.40
5*14mm/1m
0.50
10*12mm
0.60
0.10
0.10
0.10
1.4
0.10
12*14mm
0.10
0.10
1.6
S1-1 (Stair Case)
S2-2 (Stone)
0.2
5*12mm/1m
0.50
6*12mm
0.10
0.10
1m
0.10
S3-3 (Balcony)
Strip foundations Rebar S1-S1
• S1-S1: 2 strips /6m& 2 strips/ 3m=3 strips
length 6m
– Stirrup length: [(1.4 -0.05)*2+(0.5-0.05)*2] +
0.2= 3.80= 4.00m
– Stirrup count (compute length of foundation
center to center): [(6m-1.4)*2+ (3-1.4)*2]=12m
Count= 12*5 stirrups/m= 60
60Q12/4m
– Longitudinal rebar: 3*10 Q12/6= 30Q12/6m
S2-S2
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Longitudinal Rebar:
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2*3stripsQ12/5=
12*3stripsQ14/5=
6Q12/5
36Q14/5
4 strips of length 7m
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2Q12/4
12Q14/4
3 strips of length = 5m
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0.3
1 strip of length 4m
2*4Q12/7=
12*4Q14/7=
8Q12/7
48Q14/7
Stirrups:
1) [(1.6-0.05)*2+(0.6-0.05)*2]+0.2= 5m
2) [(1-0.05)*2+(0.3-0.05)*2)]+0.2= 2.6= 3
– S1-S1 length Center to center= 38m
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1) 38*6Q16/5= 228Q16/5m
2) 38*5Q12/3= 190Q12/3= 95Q12/6
5Q12/1m
6*16mm/1m
0.40
0.60
0.10
12*14mm
0.10
0.10
1.6
S2-2 (Stone)
Square
Isolated
Footings
0.3
1.3m
6*16mm/1m two way
3.2m
5*8mm/1m
6*14mm
0.20
0.60
0.10
0.50
CW1
0.10
2.6m
0.10
F1
5*8mm/1m
5*12mm/1m
0.60
6*12mm
6*16mm
0.30
0.60
C1
0.30
Tie Beam TB
Concrete of Foundations
Water reservoir
Blinding
RC
Walls
volume
H
W
L
Subtotal
5
4.8
17
6
5.8
0.3
0.1
0.35
3
3
9.7
12.8
3.4
2.6
0.3
2.8
3.2
0.6
0.1
0.6
1.3
0.952
4.992
0.234
Isolated F1
blinding
RC
FW
Strip
blinding 1-1
blinding 2-2
blinding 3-3
12.4
39.3
7.7
1.6
1.8
1.2
0.1
0.1
0.1
1.984
7.074
0.924
S1-S1
S2-S2
S3-S3
FW
12.4
39.3
7.7
59.4
1.4
1.6
1
0.3
0.5
0.6
0.5
1.3
8.68
37.728
3.85
23.166
TB
blinding
TB
15.4
15.4
0.5
0.3
0.1
0.6
0.77
2.772
Columns
1.1232
3.12
0.6
0.3
2
Concrete volume
block volume
1 block volume
rib block count
Slab Volume
273 0.01848 5.04504 33.95496
39
14.704
Blinding 15
137.877
RC 25
Slab
Civil Drawings (Roof Drawings) 4
14-18-24
40
SB
2*10
2*10
2*12/3m
SB
B2
CR
SB
B1
B1
SB
B1
SB
B2
B2
2*10
SB
B2
B1
SB
SB
SB
SB
SB
0.20
DR
DR
SB
B3
B3
B1
10*16/4
2*18/7
7*16/5
4*14/12
6*16/6
B2
12*16/4
8*16/7
8*14/5
8*14/6
B3
8*18/8
4*14/6
3*14/6
3*18/3.5m
5*16
3*14
8*16
6*16
3m
5*16/4m
5m
4*16 5*16/2.5m 4*16
4*14
5.5m
2*8/20cm
5*16
4*14
0.3
2.5m
1.00m
B1 (1:15)
B1 (1:100)
0.3
*8/20cm
6*16
4*16 6*16/4m
0.30m
SB (1:15)
4*14
0.3
5. m
0.3
4*16
*8/20cm
4*16
4m
B2 (1:100)
0.30m
DR&CR (1:15)
8*18/8
4*14
Roof Details
5. m
B3 (1:100)
6*14
2.5m
0.3
2*8/20cm
6*16
B1
4*14
10*16/4
1.00m 2*18/7
7*16/5
B2 (1:15)
4*14/12
6*16/6
B2
2*8/20cm
12*16/4
6*16
4*14
8*16/7
8*14/5
1.00m 8*14/6
B3 (1:15)
B3
8*18/8
4*14/6
16
8Q16
Slab
Rebar
5-1.5-1.5+0.64+0.64=3.3==3.5
3Q14
6Q16
3m
5
4Q14
5.5m
5
1+0.35=3.45==3.5
5Q16/6
5 2Q18/5
5 7Q16/7
5 3Q14/6
2Q16/5
5.5-1.85-1.9+0.64+0.
5+0.4+0.35=5.75==6
0.7
4Q14/3
4Q14/6
6Q16/6
3Q14/3.5
B1 (1:100)
Lower
2Q14/6
4Q14/6
6Q16/6
2Q14/7
5.5+0.15+0.4=6
0.8
6Q14/6
6Q16/6
2Q14/7
3.5
3.00
2.5
2.5
5.0
3.7
4.35
1.1
2.9
Masonry Types:
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Zawyah: 1 Lm per piece
Silah: Araqa & Kalb: 1 Lm per piece
Dustour: 2 Lm per piece
Marabee’: 4 Lm per piece
Roukh: 1 Lm per piece
Arch: 3 Lm per piece
Balcony: each 1 Lm is taken as 2 Lm
Burtash: each 1 Lm is taken as 4 Lm
1.00
2.00
1.00
1.00
1.00
1.00
0.50 1.00
1.00
Masonry Take off
• Regular Masonry Take Off:
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4*(9.5-[1+4*0.25])= 30 LM
10 (9.5-[5+10*0.25]= 20 LM
2(9.5-[5+2*0.25]= 8 LM
11(9.5-[2*0.25]= 99 LM
• Masonry Pieces Take Off:
– Lintels (Burtash)= 2*(2.2) + 6*(1.20) = 4.4+7.2= 11.60
LM
– Corner Stones= 27*2= 54
– Opening corner stone= (10*7)+18= 88
Quantity Takeoff: Steel Estimating
• Steel bar standard diameters: 8mm, 10mm,
12mm, 14, 16, 18, 20, 32
• Steel bar standard lengths: 4, 5, 6, 7, 12
• Steel overlapping follow rule 40 * Q
– If you have two bars of 10mm and 16mm, find
the overlap distance?
– Select the higher diameter and multiply with
40= 16*40=640=64cm
• Distinguish between different types of steel
Working Example: Bathroom
Quantity & Pricing:
Given information:
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3.6*2*3
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Window: 0.7*1.00
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Door: 0.8*2.1
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Bath tub: 0.7*
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Ceramic:
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Ceramic labor cost
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Ceramic Floor: 2.9*2= 6m2
walls: 11.2*3= 33.6 (33.6-[0.7+(0.8*2.1)])= 31.2 +2.7*0.15= 0.405 31.2+0.405= 31.6 Plaster quantity
Ceramic walls quantity= 31.6-0.7= 30.9m2
12KD for blinding= 12KD
20KD*3days= 60KD
Joint filling: 1*12KD skilled rate= 12KD
Ceramic material cost= 3KD/m2 *37m2= 111KD
Total Cost= 111+12+60+12= 195KD
Plaster:= 31.6m2
Plaster material (fine aggregate) cost= 31.6*0.02*1.1= 0.7m2 *2KD= 1.4KD
Plaster cement cost (1:3 means 10 cement bags per m3)= 7bags* 1.350= 9.450
Labor cost:2days*20KD=40KD
Total cost= 1.4+9.5+ 40= 51KD