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: josephchan@vtc.edu.hk

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