topic 3 - concrete and masonry

8/12/2019 Topic 3 - Concrete and Masonry

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Building Measurement

Topic 3Masonry & Concrete Works

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Lecturer: Hong Pham

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Course overview

Topic 1: Introduction & measurement techniques

Topic 2: Excavation works Topic 3: Concrete and masonry works

Topic 4: Internal finishes: floor, wall and ceiling

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Topic 5: Doors, windows and ironmongeries Topic 6: Roofing structure and covering

Topic 7: Structural steel works

Topic 8: External works

Topic 9: Piling


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Recap of Topic 2

CP97 Section 4 Excavation works

Deduct existing void / objects or area not to be excavated V excavated = V backfill + V disposal

Measure net V ; no expansion/bulk allowance V backfill = V size of hole/void

Excavation to be measured in successive stages of 3m

Cutting down trees measured in No. and be sorted by tree girth Excavation oversite measured in m3 and stated average depth Excavation works item should include backfill or disposal

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Measurementrules

3

accor ng y

Site clearance Excavation / Filling works

Support works

Site dewatering Disposal of excavated material Surface treatment

Hardcore and blinding

Underpinning

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MeasurementItems


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Building elements & Lesson plan

A. SUB-STRUCTURE

1. Piling Topic 9 Piling

2. Foundation Topic 2 Excavation

Topic 3 Concrete & masonry3. Basement

B. SUPER-STRUCTURE

1. Frame structure Topic 3 Concrete & masonry

Topic 7 Structural steelwork2. Envelope & Partitions

3. Doors & Windows

Topic 5 Doors, windows

Topic 6 Roof

4. Finishes5. Furniture & Fittings

6. Roofing

C. MEP

WORKS

D. EXTERNALWORKS

1. Drainage

2. Gate & Fencing

3. Road & Landscaping

Topic 8 External works

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Topic 3 Concrete and masonry works

1. Building elements require concrete &

masonry works2. Section 5 Concrete work

Measurement rules

Measurement items

3. Section 6 Brickwork and Blockwork

Measurement rules

Measurement items

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Building elements require concrete &

masonry works

Sub-structure

Foundation Column stumps

Ground beam/slab

- Columns

Beams

Slabs

Walls Staircases

Lintols

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CP97Section 5 - Concrete WorkMeasurement rules

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Concrete Work

In-situ concrete: Casting on-site

Pre-cast concrete: Casting off-site

In-situ concrete + Formwork + Reinforcement

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Section 5 Concrete workMea. rules Measurement items

In-situconcrete

In-situ Concrete MR1 13 1. In-situ concrete2. Sundries

Waterproofing MR14 17 3. Waterproofing4. Surface treatment

In-situ Formwork MR18 28 5. In-situ formwork

Permanent metal MR29 30 6. Permanent formwork system

Waffle formwork MR31 33 7. Waffle form

Slip formedconstruction

MR34 36 8. Slip formed construction

Reinforcement MR37 41 9. Mild steel rebars

10. High tensile rebars11. Fabric reinforcement12. Prestress tendons

Pre-castconcrete

Pre-cast concrete MR1 4 1. Form major part2. No form major part

3. Prestressed concrete 9


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SECTION 5 - CONCRETE WORK

In-situ Concrete

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In-situconcrete

Waterproofing

In-situFormwork

Reinforcement


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Section 5 - Concrete work

In-situ concrete

Measurement rules (13)

MR1: State concrete strength MR2: Separate plain & RC

MR3: State method of placing

MR4: Labour to existing works measured separately

MR5: All concrete measured in m3

MR6: State thickness when measure slabs/walls MR7: Beams/walls/columns measured to under of slab if same mix

MR8: No deduction opening 0.10 m2; void 0.05 m3

MR9: Any special treatment shall be stated

MR10: Any projection to walls considered columns

MR11: Details produced by formwork to be measured with formworks MR12: Prestressed shall be group in separate heading

MR13: General description for prestressed concrete work

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MR1: Strength or mix of the concrete

E.g. Grade 30 ; Grade 45; Grade 50

MR2: Plain and reinforced concrete to be given

Section 5 : Concrete work

In-situ Concrete Measurement Rules

separa e y

MR5: Measured m3 unless otherwise stated

MR6: Slabs, walls and the like measured in m3stating the thickness

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MR7: Beams, walls or columns:

Measured to the underside of slabs if sameconcrete mix or strength

Measured through the slabs if differenceconcrete mix or stren th



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Slab

Column

Beam

Slab

Column

Beam

Same Grade Different Grade


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MR8: No deduction for:

Voids of 0.05 m3

Volume of the reinforcement and steelwork

Cast in assessories

. , , ,

roadways

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In-situ Concrete Measurement Rules MR10: All projections shall be dealt with as columns;

shall be measured through wall

Projection to

wall

Measured

through as

Plan view Plan view15


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In-situ Concrete Measurement Items1.1 Blinding (lean concrete) m3/ thickness stated

1.2 Plinths and machine bases No/ dim & fwk stated

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In-situ Concrete Measurement Items1.3 1.6 Pilecaps / Strip fdn / Retainting wall / Underpinning m3

1.7 1.8 Isolated pier / post fdn / ground beam m3

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In-situ Concrete Measurement Items1.9 Columns / isolated piers / struts m3

1.10 Beams / braces / cantilevers m3

1.11 & 1.13 Ground slab m3 thickness stated1.12 Thickening to slab m width and thickness stated

1.13 Suspended slab m3 thickness stated/ sort in slope of 20o

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Brace


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In-situ Concrete Measurement Items1.14 1.15 Coffered slab / topping layers m3 / thickness

1.16 1.23 Walls / Retaining, lift shaft, parapet wall / Slab partitions

/ Steps & staircases / Balustrades / Landings m3/thickness

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In-situ Concrete Measurement Items1.24 1.25 Casing to steel beams/ lintols/columns m3 / thickness

1.26 1.28 Kerbs / copings / strings / sills / water channel / scupper

drain - m / incl formwork

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Sill

Surface waterchannel

Scupper

drain


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In-situ Concrete Measurement Items1.29 Cascade steps to channel No / height

2.1 2.2 Expansion joints / Water stops m/ incl formwork, labor

2.3 Special junction pieces No / incl fwk, labor2.4 Formation or grouting m / size stated

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Waterproofing

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In-situconcrete

Waterproofing

In-situFormwork

Reinforcement


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Water-proofing Measurement rules

MR15: Waterproofing particulars to be given:

Kind and quality of waterproofing Thickness and number of coats

Nature of base on which waterproofing is applied

Examples:

Applying 3 coats of water-based polyurethane liquidapplied water proofing, comply with B.S.123,

minimum thickness of 1.5mm to concrete slab.

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Water-proofing Measurement rules

MR14: Waterproofing shall be given in the following

heading where applicable: Damp-proofing and tanking

Paving and sub-floors

oo ng

MR 16: State in description if work to be done byspecially ordered, not follow the main work.

MR17: No deduction for opening of water-proofingarea 0.50 m2

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Waterproofing Measurement items

3

Waterproofing

3.1

Liquid applied

4 Surfacetreatment

4.1

Hardener

3.2Membrane

3.3 Sundries

3.4 Additives

4.2

Anti-slip

4.3

Colorant

4.4

Coatings


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Waterproofing Measurement items

3 Waterproofing

3.1 Liquid applied

m2

3.2 Membrane

m2; in 250mm widthcategory

1. Horizontal

2. Slope >10 deg3. Vertical4. Circular5. Tanking6. Damp-proofing7. Overhand work

8. Work subsequently covered9. Carried out in workspace

600 mm wide


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Waterproofing Measurement items3.3 Sundries forWaterproofing

Angle fillets / Skirtings / Coves / Turn-ups

m; Size and height stated

3.4 Waterproofing

Additive

m3

Extra over in in-situ concretecomponents;

May be included in thedescription of the in-situ

concrete

+ Area 1m2 : No+ Area > 1 m2: m2

Gutter; kerbs; channels

M; Size/dim stated

Outlets

(a) Collars around pipes

(b) Dressing into outlets

No; Size/dim stated


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Waterproofing Measurement items4 Surface treatment

To concrete surface of slabs

m2

4.1 Hardener

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4.2 Anti-slipGrooves / Rings

4.3 Colorant

4.4 Coatings


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In-situ Formwork

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In-situconcrete

Waterproofing

In-situFormwork

Reinforcement


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In-situ Formwork Measurement rules

MR19:

Describe separately the

special surface finish ofthe concrete face

State the linin material

to be left in position as afinish to concrete ; statethe method of securing tothe concrete

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MR20: Separate permanent or left-in formworkformwork from reusable fwk

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MR21: height of strutting exceeds 5.00m, formworkgiven separately in stages of 1.50m

Formwork to soffit ofslab struttin hei ht

7.00m

6.00m

exceeding 6.50m butn.e. 8.00m

Formwork to soffit ofslab, strutting heightexceeding 5.00m butn.e. 6.50m

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In-situ Formwork Measurement rules MR22: No deduction for opening 1.00 m2

MR25: Formwork is given in m2, measure the actual surface in

contact with the concrete

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MR26: Formwork to edges and breaks in floors and walls andthe like where under 500mm wide shall be given in m2 and

grouped in stages of 250mm.E.G. width n.e. 250mm

width e. 250mm but n.e. 500mm

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Edge of

slabSlab Section

Break

in wall

Wall elevation

S i C k


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Section 5 : Concrete workIn-situ Formwork Measurement rules

MR 27: No deduction for formwork at intersectionsbetween

Main and secondary beams Beams and columns

MainBeam

MainBeam

SecondaryBeams

Plan view36

Column Column

Beams

Elevation

S ti 5 C t k


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Section 5 : Concrete workIn-situ Formwork Measurement rules

MR 28: Formwork shall be measured to the surfaceof work sloping more than 20 degrees from thehorizontal

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S ti 5 C t k


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Section 5 : Concrete workIn-situ Formwork Measurement items

Horizontal surfaces

Strutting hi 5m

Strutting hi > 5m, stage

1.5m

For:

Slabs, staircases,

Ramps, etc.

Vertical surfaces

For:

Foundation

Columns

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5 In-situformwork

Beams

Curved surfaces

For:

Curved walls,

Tank, etc.

Edges / breaks

Width in 250mmcategory

For:

Floors; walls; openstrings of stairs

m2

S ti 5 C t k


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Section 5 : Concrete workIn-situ Formwork Measurement items

Cornices and mouldings /Formation produced by

formworkm/ size stated

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5 In-situformwork

Small surfaces /

Cantilever ends / capsNo/ size stated

Formwork / temporary

support for pre/posttension units

m2/ size stated

Height above ground


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Reinforcement

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In-situconcrete

Waterproofing

In-situFormwork

Reinforcement


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Section 5 : Concrete workReinforcement Measurement rules

Reinforcement bars:

MR39: Weights per metre for steel bars:

Diameter

6mm

Kg/m

0.222

Diameter

25mm

Kg/m

3.854

10mm

12mm

16mm

20mm

.

0.616

0.888

1.579

2.466

32mm

36mm

40mm

44mm

56mm

.

6.313

7.991

9.864

11.926

19.318

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Section 5 : Concrete workReinforcement Measurement rules

MR40: Measured follow the location of in-situ concretethat they belong to:

Descriptions:

In situ Concrete Grade 45 in:

Quantities

Beams B1

Mild steel reinforcement bars in:

Beams B1

12mm dia.25mm dia.

7.50m3

700 kg800 kg

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Section 5 : Concrete workReinforcement Coverage Information

C14: Reinforcement shall deem toinclude Allowances for rolling margins

All cleaning, cutting, bending,fabricating, placing & tying

All necessary distance blocks

Tying wire

Spacers or chairs

Temporary fixings & supports

Special joints

Additional reinforcement around

openings


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Section 5 : Concrete workReinforcement Measurement items

Reinforcement

Mild steel / Hightensile bars

Kg

State Diameter

Fabricreinforcement

Wire mesh

m2

State Mesh ref. &

Weight per m2

Categorize Width

Examples

Fabric reinforcement F1,50kg/m2, in suspended Slab:

> 500 mm wide

Qty

300m245

> 500 mm

500 mm

Pre-stressedtendon

Kg

State Diameter; Number &Ultimate strength


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Section 6 Brickwork

and Blockwork (Masonry)

1. Brickwork2. Blockwork

3. Glass blockwork

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Section 6: Brickwork & Blockwork


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MR1: The following shall be given:

Kind, quality and size of bricks

Type of bond

Mix of mortar for bedding, jointing and pointing

Section 6: Brickwork & BlockworkBrickwork - Measurement Rules

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MR2: Brickwork is measured on the centre line of thematerials

Area of Brickwork (m2) = Mean Girth x Height

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Ht



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MR3: Brickwork shall be given in m2 and measuredseparately according to thickness


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MR5: No deduction for openings 0.50 m2

MR6: Deductions shall be made for string courses,lintels, sills, plates and the like only when exceeding

Sect o 6 c o & oc oBrickwork - Measurement Rules

50

Sill

String course



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MR7: Brickwork curved or circular on plan shall bemeasured separately on the mean length of thewall, and the radius will not be stated.

Brickwork - Measurement Rules

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Brickwork - Measurement items

Brickwork

1 Common bricks

Facingbricks

Common bricks

- To be covered

with plaster

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3 Brickwork inconnection with boilers

4 Damp proof courses

5 SundriesBoiler



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1.1 Footings

m3; width stated

1.2-7 Under innin /

Commonbricks

Walls / Piers /

Casingsm2

Thickness stated

1.8 Brickwork in

raising & off girdersm2

Thickness stated

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1.9 Hollow walls

m2 ; state inner skin;

outer skin; cavity widthType of wall ties

-

Commonbricks

. -existing walls / Filling in

openings / Vaultingm2

Thickness stated

1.13 Fairface ofbrickwork

m2

Measure exposed faces

State method ofpointing

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1.14 Arches

m ; state height, width,shapes, exposed faces,

pointing method, No. ofArches

1.15-16 Limewhiting / Cement

Commonbricks

-

1.17 Projections

Width/Ht > 300mm m2

Widht/Ht 300mm m

1.18 Cutting, toothing andbonding to existing walls

1.19 Bedding corrugated sheeton tops of walls

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2.1-10 Faces of walls

m2 ; nature of brick,pointing type; measured

to whole of the faces;Extra Over to commonbrickwork

Facingbricks

2.11 Arches

m; types of bricks;pointing methods;

Ht & width state

1.12 Quoins

mAve width stated;

Flush/projecting/Bondingto the facings

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2.13-17 Squints/ Birdsmouths/ Splays

m; Width, radius stated

2.18-19 Stops/ Angles

Squint

Facingbricks

2.20 Sills and coping

m

Dim stated; No. of courses andprojection

2.21 Pier caps / Cramps

2.22 Sundries : Key blocks, Corbels;Panels; Tumbling to buttresses

No.; Dim stated

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birdsmouth

corbels



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3.1 Firebrick liningsm2; Thickness stated

Boilers

3.2 Detached chimney shafts

3.3 Boiler seating blocks / Curvedflue covers

m; Ht & Thk stated; Dim stated

3.4 Irregular boiler seating blocks /

Curved flue blocksNo; Dim stated

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4.1 Width 300mm

Width >300mm

Damp

proofcourses

m

Categorize by:Vertical; Raking;

Horizontal; Curved;Stepped; Overhand

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Section 6: Brickwork & BlockworkB i k k M i


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5.1 House flue linings and refuse

chutes in brickworkm; thickness & size stated

Sundries

5.2 Precast concrete block chute

or fluesNo; Dim stated

5.3 Airbricks

5.4 Ventilation gratings

5.5 Soot doors

No; Wall thk & Size of openingstated

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topic 3 - concrete and masonry

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