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Hong Kong Institute of Vocational Education (Tsing Yi)
Higher Diploma in Civil EngineeringConstruction Contract Administration and Project Management(CON 4371)Topic: Practicing measurement on Column baseLecture No. 3
Module Lecturer : Dr. Joseph ChanContact Tel.: 3757 9162 Office: IVE(TY)-BU02aContact email: [email protected]
1
What is column base?
2
3
What are the ingredients inside the column base
that we need to measure?
4
5
6
7
RC Column Base foundationDrawing No.: as stated
Taking-off List• Earthwork• Concrete Blinding• Reinforced Concrete• Formwork• Steel Reinforcement
8
2 types of cap!
Different depths!
9
Earthwork first!
10
Size of the excavated hole(no working space would be allowed in Civil Engineering Measurement)
1.50m1.50m
2.00m2.00m
Depth29.50
- 27.302.20
+ 0.052.25
Depth29.50
- 25.903.60
+ 0.053.65
11
Remember:All excavation are in soil(no rock or AHM)
12
As referred to CESMM,The excavation is
measured as
Existing ground level
0 – 3m
3 – 6m
6 – 9m
Remember
13
2.50m
5.50m3.
00m
Exc.; 0-3m dp
Exc.; 3-6m dp
Remember
14
2.50m
5.50m
3.00
mExc.; 0-3m dp
Exc.; 3-6m dp
15
Size of the excavated hole(no working space would be allowed in Civil Engineering Measurement)
1.50m1.50m
2.00m2.00m
Depth29.50
- 27.302.20
+ 0.052.25
Depth29.50
- 25.903.60
+ 0.053.65
0-3m 3-6m
3-6m0-3m
0-3m0-3m
16
RC Column Base foundationDrawing No.: as stated
Taking-off List• Earthwork• Concrete Blinding• Reinforced Concrete• Formwork• Steel Reinforcement
You can write your draft calculation here.(Waste calculation)
Excavation for fdn,Material other than rock or artificial hard material, max. depth n.e. 3.00m
1.501.502.25
4
20.25
Excavation for fdn,Material other than rock or artificial hard material, max. depth 3.00-6.00m
2.002.003.65
29.20
2
m³
m³
20.25
29.20
17
Sometimes, the excavated would be removed off site and deposited within site for backfilling use.
Excavation & deposition Backfilling above structure
18
Excavated volume(m³)
Disposal off site(m³)
Deposition first(m³)
Backfill for Compaction(m³)
19
Excavation for fdn,Material other than rock or artificial hard material, max. depth n.e. 3.00m
1.501.502.25
4
20.25
Excavation for fdn,Material other than rock or artificial hard material, max. depth 3.00-6.00m
2.002.003.65
29.20
2
and
Deposition general fill material, above fdn
and
Compaction general fill material, above fdn
and
Deposition general fill material, above fdn
and
Compaction general fill material, above fdn
m³m³
20.25 29.20
20
Excavated material (m³)
Disposal (m³) Deposition & Compaction (m³)
21
In-situ concrete grade 10/20S, OPC to BS12;Blinding concrete
1.501.500.05
0.45
and
4
2.002.000.05
0.40
2
0.85
Ddt – Deposition a.b.d.
andDdt – Compaction a.b.d.
andDisposal of material other than rock or AHM in tips provided by the Employer
m³
a.b.d.: as before described.
22
Excavated material (m³)
Disposal (m³) Deposition & Compaction (m³)
23
In-situ reinforced concrete grade 30/20D, OPC to BS12
1.501.500.50
4.50
and
4
0.500.501.70
1.70
4Ddt – Deposition a.b.d.
andDdt – Compaction a.b.d.
andDisposal of material other than rock or AHM in tips provided by the Employer
2.002.000.75
6.00
2
0.500.502.85
1.43
2
13.63
m³
24
Excavated material (m³)
Disposal (m³) Deposition & Compaction (m³)
25
Fwk Class F1; ex 300mm at any inclination; 85-90°1.50
0.50 12.00
4
0.501.70 13.60
4
2.000.75 12.00
4
0.502.85 11.40
4
49.00
4
4
2
2
m²
Steel Reinforcement
26
27
Bar reinf., MS 10mmØ;n.e. 12m length to BS 44490.74
40.70
55
40.70m x 0.666 kg/m= 25.071 kg= 0.025 tonne
Bar reinf., HY 12mmØ;n.e. 12m length to BS 44491.59
50.88
32
50.88m x 0.888 kg/m= 45.181 kg= 0.045 tonne
Bar reinf., HY 16mmØ;n.e. 12m length to BS 44492.07
53.96
28
53.96m x 1.579 kg/m= 91.579 kg= 0.092 tonne
Bar reinf., HY 20mmØ;n.e. 12m length to BS 44491.00
30.00
30
30.00m x 2.466 kg/m= 73.98 kg= 0.074 tonne
m
m
m
m
28
29
30
Measurement techniquein
Civil Engineering Work
31
Section 7 - Earthwork
Unit in (m³)
32
General / Structure / Foundation
Soil / Rock / Artificial Hard Mat’l
0-3m / 3-6m / 6-9m / ….
No depth range for general excavation
Section 7 - Earthwork
33
Excavation volume
Disposal
Dep
ositi
on &
Bac
kfill
Dep
ositi
on &
Bac
kfill
Section 10 - Formwork
Unit in (m²)
34F1 / F2 / F3 / F4 / F5
Check exceed 300mm or notIf n.e. 300mm If >300mmAny inclination 0-5°
5-85°85-90°
If curved, please stated
Section 11 - Reinforcement
Unit in (tonne)
35
Bar reinforcement
Mild steel / High yield steel
Diameter and BS4449
Bar n.e. 12m in length
Section 12 - Concrete
Unit in (m³)
36
What grade?Grade 10/20; Grade 30/20Any type of cement/PFAIf BS stated; state it. BS12
Blinding & no-fine MUST be stated if applicable
37