HKSMM4 2005

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HKSMM4

BUILDING

WORKS

Hong Kong Standard Method of Measurement of Building Works - Fourth Edition

Authorised between

The Hong Kong Institute of Surveyors,

The Hong Kong Construction Association Ltd.,

The Hong Kong Government Architectural Services Department,

The Hong Kong Institution of Engineers,

The Hong Kong Electrical & Mechanical Contractors’ Association,

The Chartered Institution of Building Services Engineers, and

The Association of Cost Engineers (Hong Kong Region).

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First Edition, Building Works, 1962

Second Edition, Building Works, 1966

Third Edition, Building Works, 1979

First Edition, Building Services, 1993

Fourth Edition, Combined Building Works & Building Services, 2005

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Preface to Fourth Edition 2005

The Hong Kong Standard Method of Measurement of Building Works, since its first Edition in 1962, has evolved to meet the changing methods of construction

and contracting procedures, through the second edition in 1966 and the third edition in 1979. This fourth edition, initiated by The Royal Institution of Chartered

Surveyors (Hong Kong Branch) was subsequently prepared under the auspices of The Hong Kong Institute of Surveyors. It includes sections for Building

Services, which were previously published as a separate document in its first edition in 1993.

The new tabulated format for this fourth edition is based upon the United Kingdom SMM 7, but the Elemental format used in SMM 7 has, by general consent,

not been followed and the Trade Section maintained as being more suitable for the Hong Kong Contracting and Sub-contracting procedures.

It is hoped that the systematic tabulated format will make for easy reference and facilitate the compilation of standard phraseology for libraries of descriptions

and for computerisation.

The members of the standing sub-committees producing this document were:

BUILDING WORKS

Representing the Hong Kong Institute of Surveyors

Mr. K. S. Shum

Mr. Y. Y. Ho

Mr. Au Kam Fai, Eric

Representing the Hong Kong Construction Association Ltd.

Mr. Peter Tann

Mr. Ambrose Chan

Mr. Eddie Toh

Chairman

Mr. K.E.N. Goodbourn

Other Gentlemen who have served on the sub-committee during

the 10 years of the preparation of this document are

Mr. Hermes K. S. Wong

Mr. Tommy Wong

Mr. Albert Cheung

Mr. Mike Ashton

Mr. C. W. Cheung

Mr. Patrick Ip Chun Po

Mr. Ricky Kwok

Mr. David K. K. Lai

November, 2005.

BUILDING SERVICES

Representing the Architectural Services Department

Mr. Y. K. Chu

Representing the Hong Kong Construction Association Ltd.

Mr. C. M. Yung

Representing the Hong Kong Institute of Surveyors

Mr. Sam Cheng (Chairman)

Representing the Hong Kong Institution of Engineers

Mr. Howard Lok

Mr. C. K. Wong

Representing the Hong Kong Electrical and Mechanical Contractors’ Association

Mr. Steve Griffin

Representing the Chartered Institution of Building Services Engineers

Mr. Victor Cheung

Representing the Association of Cost Engineers (Hong Kong Region)

Mr. C. Y. Wong

Representing the Standing Sub-committee for the Building Works SMM

(as Co-ordinating member)

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Preface to First Edition 1962

The vast development of the building industry in Hong Kong during the past decade has created a wide-spread realisation of the importance and usefulness of Bills of

Quantities. Local conditions have not justified the adoption of the English Standard Method of Measurement, which nevertheless has been followed in a general sense in

Government and private practice and adapted mainly by including most labours with the relative items. Adaptation, however, has been completely arbitrary, depending upon

the discretion or inclination of the individual surveyor. The Services have for some while had their own “Rules of Measurement” for the Far East which is restricted in general

use and application in Hong Kong. Building Contractors, while becoming more and more “B.Q. conscious”, have at the same time been faced with a growing diversity of

methods of measurement which has not only been deleterious to scientific estimating but has in fact resulted in the occurrence of serious errors.

The time, then, has clearly arrived for the introduction of a local standard method of measurement. To this end a meeting of Chartered Quantity Surveyors appointed a

Sub-Committee to consider ways and means of procedure. This Sub-Sub-Committee was subsequently joined by representatives of the local building industry to form a Joint

Commit-tee which has now produced this First Edition. In general the procedure was as

follows:-(a) the surveyor members prepared a preliminary draft to be handed trade-by-trade to the builder members for reference to their association for comment or amendment;

(b) the full committee met from time to time to discuss and agree progressively a secondary draft;

(c) the secondary draft was distributed to all interested parties for comment and suggestions;

(d) the full committee considered all suggestions received for adoption or rejection and agreed a final draft.

No attempt has been made to cover every possible item which could arise but rather to produce in the first instance a document ensuring consistency of measurement of those

items normally encountered in the Colony.

It is recommended by the Joint Committee that this document be reviewed annually to consider any revisions or addenda that may become advisable.

The members of the Joint Committee are

Chartered Quantity Surveyors

:-H. Miller (Chairman)

R. B. Hanna

C. R. Holmes

J. A. Lilley

J. V. Moore

K. E. N. Goodbourn (vice C. R. Holmes)

Representatives of the Building Contractors’ Association

:-S. K. Ho

W. L. Yau

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Preface to Second Edition 1966

The First Edition of this Standard Method of Measurement, published in January 1962, was very well received by quantity surveyors and building contractors and has done

much to foster a growing confidence in Hong Kong in the system of tendering on Bills of Quantities. The document has been adopted for use by all professional surveyors

throughout the Colony and has now been recognised by The Royal Institution of Chartered Surveyors as a basis for local professional examinations.

After the First Edition had been in use for some three years a Standing Joint Committee, comprising equal representation from surveyors and the building industry, was

appointed to keep under review possible amendments and revisions. Suggestions were invited from all local quantity surveyors and building contractors and the Committee

wishes to express its thanks to all who by their response have contributed towards the publication of this Second Edition. It is gratifying to note that, after careful consideration

of all suggestions received, the actual number of revisions incorporated is small and of a minor nature and will therefore cause little disturbance in adopting the later edition.

The members of the Standing Joint Committee are

Chartered Quantity Surveyors

:-H. Miller (Chairman)

K. E. N. Goodbourn

D. G. Levett

Representatives of the Building Contractors’ Association of Hong Kong

:-S. K. Ho

W. L. Yau

G. Yeh

Mr. R. B. Hanna and Mr. G. Luk kindly served on the committee during the temporary absence of Mr. H. Miller and Mr. W. L. Yau respectively.

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Preface to Third Edition 1979

The Standard Method of Measurement as first published in 1962 and revised in 1966 has provided a standard for the preparation of Bills of Quantities for a large volume of

building works both in the Public and Private sectors; it is incorporated into the Conditions of Contract for Public Works and the Standard Form of Building Contract issued

under the sanction of The Hong Kong Institute of Architects, The Royal Institution of Chartered Surveyors (Hong Kong Branch) and The Society of Builders, Hong Kong; it is

recognised by The Royal Institution of Chartered Surveyors as a basis for local professional examinations; and it has been translated into Chinese and published as an

ancillary document.

In view of the advancement in engineering technology and architectural design and the ever increasing sophistication of the construction industry in Hong Kong it was decided

that it was necessary to publish a revised edition.

The Committee appointed to administer revisions to the Standard Method of Measurement invited local quantity surveyors and building contractors to submit suggestions for

the improvement and amplification of the document in the light of their experience in its use. All of the suggested alterations were carefully considered, revisions were made

where applicable and new sections such as Demolitions and Alterations, Piling and Caissons, Prestressed Concrete Work and Proprietary Demountable Partitions were

incorporated.

In addition the opportunity was taken to re-edit the document completely to remove uncertainties in interpretation whilst retaining the original intent.

Whilst an appreciable number of alterations have been made, there are very few which involve fundamental changes in the previously prescribed methods of measurement,

the majority of the changes are to update the document in line with the developments in building methods; to make clear the intention, where there appears to be possibility

of misinterpretation; to improve the style or to remove inconsistencies within the document.

The proposal to change from the present system of measurement of mixed earth and rock excavation to a system where rock is measured separately as an “extra over” item

was discussed at length without resolution, the Committee being divided in its views of the practicality of the separate measurement of rock in the Hong Kong situation. The

item was left for further consideration by the Committee when preparing the next Edition.

The Third Edition will become operative on 1st February 1979 and is post dated accordingly.

In view of the decision to adopt the use of the Metric System in the construction industry for all new projects initiated after 1st April 1977 the Third Edition has been published

in metric. It was considered unwarranted to produce an Imperial version as well as the Metric version, although a limited number of contracts already in various stages of

planning will be based upon Imperial Units after this edition becomes operative.

Bills of Quantities prepared after 31st January 1979 in Imperial measurement will be based on this Third Edition, but units of measurement, and any staging or sizes required

to be stated, shall be as detailed in Appendix A.

The Committee expresses its gratitude to the Surveyors and Builders who submitted suggestions for the improvement of the document and to those Specialists who

contributed to the re-drafting of the insurance clauses and the drafting of the piling clauses.

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The Committee expresses its special gratitude to the Sub-Committee responsible for carrying out so enthusiastically and so thoroughly the monumental task of translating the

Second Edition into Chinese. The members of this Sub-Committee were

:-Patrick D. P. Woo (Chairman),

John S. King (Secretary),

W. K. Chang,

David Y. C. Cheung,

K. S. Lau,

John H. P. Lok,

Charles C. C. Wong.

The members of the Standing Joint Committee are

Representing The Royal Institution of Chartered Surveyors (Hong Kong Branch)

:-B. J. White (Chairman)

K. E. N. Goodbourn

D. G. Levett

Representing the Building Contractors’ Association of Hong Kong

:-John H. P. Lok

Charles C. C. Wong

John W. L. Loo

Other gentlemen who have served on the Committee during the preparation of this edition are

:-H. Miller, the Chairman of the Joint Committee from its inception until his retirement from Hong Kong, R. B. Hanna and Geoffrey M. T. Yeh.

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Preface to Fourth Edition 2005

i

Preface to First Edition 1962

iii

Preface to Second Edition 1966

iv

Preface to Third Edition 1979

v

I

Use of Tabulated Format

1 II

General Principles

3 III

Preliminaries

9 IV

Demolitions and Alterations

19 V

Piling and Caissons

25 VI

Excavation

45 VII

Concrete Works

57 VIII

Brickwork and Blockwork

75 IX

Drainage (including Underground Pipe Duct)

81 X

Waterproofing

85 XI

Stone Works

91 XII

Roof Tiling

97 XIII

Wood Works

99 XIV

Ironmongery

117 XV

Steel and Metal Works

119 XVI

Plastering and Paving

143 XVII Mechanical Installations

153 XVIII Electrical Installations

171 XIX

Communications / Security / Control Systems

183 XX

Glazing

191 XXI

Painting

195 XXII Landscaping

201 Alphabetical Index

205 (Last page)

207 SUMMARY OF CONTENTS

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DETAILED CONTENTS

(List of Sections)

(See also the Alphabetical Index on Page 205)

I

USE OF TABULATED FORMAT

1 II

GENERAL PRINCIPLES

3

APPENDIX “A”

7 III

PRELIMINARIES

9

(a) Preliminary Particulars 9 (b) Conditions of Contract 10

(c) General Matters 11

IV

DEMOLITIONS AND ALTERATIONS

19

(a) Demolitions 19

(b) Alterations 21

(c) Temporary Screens and Temporary Roofs 23

(d) Shoring 23

V

PILING AND CAISSONS

25

(a) Piling General 25

(b) Steel Sheet Piling 25

(c) Precast Concrete Piles 28 (d) Cast In-situ Concrete Piles in Driven Casings 30

(e) Bored Piles 33

(f) Steel Piles 36 (g) Caissons 39 (h) Diaphragm Walling 43

VI

EXCAVATION

45

(a) Excavation 45 (b) Underpinning 53

VII

CONCRETE WORKS

57

(a) Concrete 57

(b) Gun Applied Reinforced Concrete 64

(c) Reinforcement 65

(d) Formwork 66

(e) Precast Concrete Work 70 (f) Prestressed Concrete Work 71 (g) Precast Prestressed Concrete Work 73

VIII

BRICKWORK AND BLOCKWORK

75

(a) Brickwork and Blockwork 75 (b) Brick and Block Pavings and Steps 79

IX

DRAINAGE (including Underground Pipe Ducts)

81 X

WATERPROOFING

85

(a) Asphalt 85

(b) Liquid Membrane Waterproofing 85

(c) Felt Roofing 88

(d) Sheet Membrane Waterproofing 88

XI

STONE WORKS

91

(a) Stone Construction 91

(b) Stone Facings to Structural Backgrounds (including Cast Stone,

Marble and Granite) 94

XII

ROOF TILING

97

(a) Chinese Roof Tiling 97

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XIII

WOOD WORKS

99

(a) Structural Timber 99

(b) General Clauses 100

(c) Flooring 101

(d) Raised Access Floors 102 (e) Sheet Linings / Claddings, Timber Suspended Ceilings,

Unframed Trims, Insulation, Proofing Works and Fire Stops 103 (f) Profiled Sheet Roof Coverings and Wall Claddings 107 (g) Fixed Partitions and Demountable Partitions 108 (h) Toilet Cubicle Partitions, Office Cubicle Partitions and Fittings 110 (i) Doors, Hatches, Ventilators and the like and Frames and Linings 111 (j) Stairs, Handrails and Balustrades 113 (k) Furniture, Fittings, Shelving, Racks, Playground Equipment etc. 114 (l) Minor Buildings and Structures mainly of Timber Construction 115 (m) Insulation / Proofing Works / Fire Stops 116

XIV

IRONMONGERY

117 XV

STEEL AND METAL WORKS

119

(a) Structural Steel 119

(b) Linings, Coverings and Cladding 122 (c) Roofing and Flashings etc. 123 (d) Doors, Gates, Shutters, Grilles and Hatches 124 (e) Framed Work, Stairs, Handrails and Balustrades 125

(f) Fencing and Gates 127

(g) Minor Buildings and Structures mainly of Metal Construction 128

(h) Sundries 129

(i) Raised Access Floors 131

DETAILED CONTENTS (continued)

(j) Metal Profiled Sheet Roof Coverings and Wall Claddings 131 (k) Fixed Partitions and Demountable Partitions 133 (l) Toilet Cubicle Partitions and Office Cubicle Partitions and Fittings 135

(m) Suspended Ceilings 136

(n) Windows and Glazed Doors 138

(o) Shop Fronts 139

(p) Curtain Walling 141

(q) Furniture, Fittings, Shelving, Racks, Playground Equipment etc. 142

XVI

PLASTERING AND PAVING

143

(a) Spatterdash 143

(b) Lathing and Plasterboard 143

(c) General Clauses 144

(d) In-situ Surface Finishes and Screeds or Backings 145 (e) Tile and Slab Finishes 148 (f) Rubber and Plastic Sheet or Carpet Sheet / Tile Finishes

and the like 151

XVII

MECHANICAL INSTALLATIONS

153

(a) General Clauses 153

(b) Equipment 154

(c) Sanitary and Laboratory Fittings 155

(d) Pipework 156

(e) Gutters 160

(f) Ductwork 161

(g) Insulation 164

(h) Protective Coverings and Finishings 166

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XVIII

ELECTRICAL INSTALLATIONS

171

(b) Equipment and Switchgear 172 (c) Conduit (except in Final Circuits) 173 (d) Trunking and Busbar Trunking 174

(e) Trays and Ladders 175

(f) Cables (except in Final Circuits) 176 (g) Final circuits (Cables etc. in Final Circuits) 178 (h) Fittings and Accessories 179 (i) Earthing, Lightning Protection and Bonding 180

(j) Sundries 181

XIX

COMMUNICATIONS / SECURITY / CONTROL SYSTEMS

183

(b) Equipment 184

(c) Distribution and Principal Interconnections 185 (d) Final Circuit Points 186

(e) Sundries 189

XX

GLAZING

191

(a) General Glazing (including Acrylic and Polycarbonate Sheets) 191 (b) Glass Wall Linings, Floors, Balustrades and Parapets 193 (c) Mirrors, Glass Shelves and Sundry Glazing Works 194

XXI

PAINTING

195

(b) Painting and Similar Work 197 (c) Polishing and Clear Finishing 198

(d) Signwriting 199

(e) Paperhanging (including Sheet Plastic and Fabric Linings) 199

XXII

LANDSCAPING

201

(a) Site Clearance and Excavating Works 201 (b) Turfing and Grass Seeding 201

(c) Planting 202

(d) Boulders 203

(e) Removal of Water 203

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1. GENERALLY

1.1 The rules in this document are set out in tables. Each section of the rules comprises information (to be) provided, classification tables and supplementary rules.

1.2 Horizontal lines divide the classification tables and supplementary rules into zones to which different rules apply.

2. APPLICABILITY OF RULES

2.1 Rules printed above a double line apply to all work following in the Section or Sub-section within the Section. Other rules apply only to the particular group of items against which they are shown.

3. CLASSIFICATION TABLES

3.1 Within the classification tables where a broken line is shown, the rules given above and below the broken line may be used as alternatives.

3.2 In referring to columns in classification tables, the measurement unit column has been disregarded. The remaining four columns are herein referred to as the first, second, third and fourth columns.

3.3 The first column lists the items commonly encountered. Each of these items may have one qualifying sub-item if there is insufficient capacity in the 2nd, 3rd or 4th columns. The second and third columns list sub-items into which each item or group of items are divided. These sub-items may contain one or more descriptive features which are not mutually exclusive. The lists in these columns are not intended to be exhaustive. The fourth column similarly provides for further sub-division, and in addition lists further sub-items that may be required to complete the total description of the item.

3.4 Each item description shall identify the work with respect to one sub-item drawn from each of the first three columns in the classification table and as many of the sub-items in the fourth column as are applicable to the item. The general principle does not apply to Preliminaries in that it will be necessary to select as many sub-items as appropriate from each column.

3.5 Where the number of units is required to be stated in the item, as for example “300 metres of precast concrete lintols, in 268 number” or, in Building Services Works, “1,000 kg of fabricated composite support structures, in 168 number”, this is stated in the measurement unit column.

4. SUPPLEMENTARY RULES

4.1 Measurement rules set out when work shall be measured and the method by which quantities shall be computed.

4.2 Definition rules define the extent and limits of the work represented by a word or expression used in the rules and in a Bill of Quantities prepared in accordance with the rules.

4. SUPPLEMENTARY RULES (continued)

4.3 Coverage rules draw attention to particular incidental work (both labour and material) which shall be deemed to be included in the appropriate items in a Bill of Quantities to the extent that such work is included in the tender documents.

4.4 The column headed Supplementary Information contains rules governing the information which shall be given in addition to the information given as a result of the application of rule 3.4. 4.5 A separate item shall be given for any work which differs from other work with respect to any

matter listed as supplementary information.

5. DESCRIPTIONS

5.1 The requirements for information to be provided by the application of rules 3.4 and 4.4 may be fulfilled by reference to other documents or drawings or published information.

5.2 Headings to groups of items in a Bill of Quantities shall be read as part of the descriptions of the items to which the headings apply.

5.3 The use of a hyphen between two dimensions in this document or in a Bill of Quantities shall mean a range of dimensions exceeding the first dimension stated but not exceeding the second.

6. CROSS-REFERENCES

6.1 Cross-references within the classification tables are given in the form:

Work Work Number Number Number Number

Section Sub-section from first from second from third from fourth Number Number. column. column. column. column

Example: Formwork VII (d).2.1.1

Formwork to soffits of slabs slab thickness ≤ 200 mm horizontal

6.2 An asterisk within a cross-reference represents all entries in the column in which it appears. 6.3 The digit 0 within a cross-reference represents no entry in the column in which it appears.

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1. BILLS OF QUANTITIES

1.1 Bills of Quantities shall fully describe the materials and workmanship and accurately represent the work to be executed; work which by its nature cannot be accurately measured shall be described as provisional. Provisional quantities, items or sections shall represent the work to be carried out as accurately as is reasonably possible.

1.2 In order to define the precise nature and extent of the proposed work it will be necessary to give, in descriptions or elsewhere, certain supplementary information including any limits on tolerances, method, sequence etc. imposed by the designer.

2. PRINCIPLES OF MEASUREMENT

2.1 This Standard Method of Measurement, whilst aiming at providing uniform units of measurement and standard allowances, etc., is a definition of principle rather than an inflexible document. In particular and exceptional cases the Surveyor is expected to use his discretion and to adopt special methods, provided the principles of measurement laid down are observed and the intention is made clear to the Estimator.

If it is in the interest of accurate and practical estimating, he may give more detailed information than is demanded by strict adherence to this document.

2.2 The method of measurement for work not covered by the clauses of this Standard Method of Measurement, and also deviations from, or qualifications to, this Standard Method of

Measurement, shall be stated in the Preambles to the Bills of Quantities or in the description of the items to which they apply. The method adopted for work not covered shall, as far as possible, conform to that given in this document for similar work.

3. APPLICABILITY OF METHODS OF MEASUREMENT

3.1 The methods of measurement laid down shall equally apply to the preparation of Bills of Quantities before the work is commenced and to the measurement of finished work.

4. UNITS OF MEASUREMENT

4.1 The following units of measurement shall, except as hereinafter provided, be adopted

throughout:-(a) Items given by weight - kilograms; (b) Items given cube - cubic metres; (c) Items given super - square metres; (d) Items given run - linear metres;

(e) Items enumerated - number or sets, as applicable;

(f) Items given by time may be given in “Days” or “Hours” - if these items are used, they should be defined.

4. UNITS OF MEASUREMENT (continued)

4.2 Each measurement shall be taken to the nearest 10 millimetres (i.e. 5 millimetres and over shall be regarded as 10 millimetres and less than 5 millimetres shall be disregarded). This rule shall not apply to any dimensions stated in descriptions.

5. SYMBOLS AND ABBREVIATIONS

5.1 The following symbols and abbreviations are used in this method of measurement:

m= metre m2 _{= square metre} m3 _{= cubic metre} mm = millimetre nr = number kg = kilogramme

≥ = Equal to or greater than > = Greater than/exceeding

≤ = Equal to or less than/not exceeding < = Less than

dia. = Diameter min. = Minimum max. = Maximum Prov’ = Provisional

6. DRAWINGS AND SPECIFICATION

6.1 The Drawings from which the Bills of Quantities have been prepared shall be listed and reference shall be made to any Specification on which the Bills of Quantities descriptions are based. 6.2 It should be noted that this is a separate requirement to the necessity of listing the Contract

Drawings and, where required by the Contract Document, the Contract Specification, as these may, in due course, be varied.

7. UNITS OF BILLING

7.1 Where the unit of billing is the metre, quantities shall be billed to the nearest whole unit. Fractions of a unit less than half shall be disregarded and all other fractions shall be regarded as whole units.

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7. UNITS OF BILLING (continued)

7.2 Where the unit of billing is the kilogram, quantities shall be billed to the nearest whole unit. Fractions of a unit less than half shall be disregarded and all other fractions shall be regarded as whole units.

7.3 Where the application of this Clause would cause an entire item to be eliminated, such item shall be billed as one whole unit.

7.4 When billing items of variation or remeasurement in adjustment of accounts, omissions and additions of items where the unit of billing is the metre shall be billed to the nearest one tenth of a whole unit, and where the unit of billing is the kilogram shall be billed to the nearest whole unit. Where, however, one whole unit has been billed in conformity with rule 7.3 above, and the original quantity has been deducted, then the whole unit shall be omitted.

8. WORK MEASURED NET

8.1 Unless otherwise stated, all work shall be measured net as fixed in its place.

9. ORDER OF DIMENSIONS

9.1 In giving dimensions the order should be consistent, and generally in the sequence of length, width and height.

10. DESCRIPTIONS OF ITEMS

10.1 Notwithstanding these principles of measurement, proprietary items may be measured in a manner appropriate to the manufacturer’s tariff or customary practice.

10.2 The descriptions of items in Bills of Quantities may refer to other documents or drawings and any reference to such information shall be understood to fulfil any requirements of these principles of measurement; alternatively, reference may be made to published information.

11. COSTS HELD TO BE INCLUDED IN ITEMS

11.1 Each item shall, unless otherwise stated, be held to include: (a) Labour and all costs in connection therewith;

(b) Materials, goods and all costs in connection therewith (e.g. conveyance, delivery, unloading, storing, returning packings, handling, hoisting, lowering);

(c) Fitting and fixing materials and goods in position; (d) Use of plant;

(e) All cutting and waste;

(f) Establishment charges, overhead charges and profit.

12. MINIMUM DEDUCTIONS

12.1 Where minimum deductions of voids are dealt with in this document they shall refer only to openings or wants detached from the boundaries of the space measured.

12.2 Openings and wants caused by projections from the boundary of the space measured shall always be the subject of deduction, irrespective of size.

13. PIPE OR TUBING SIZES

13.1 Pipes or tubing (which terms shall be synonymous for these rules of measurement) shall be described by their nominal sizes unless otherwise stated.

14. DAYWORKS

14.1 As Contractors have differing practices in:

(a) the number of hours included in a normal working day;

(b) payment of overtime rates for hours worked in excess of a normal working day; (c) payment of overtime rates for Sundays and Labour Holidays,

some provision should be made in Dayworks Schedules for the differentials to be priced, probably as percentage on-costs over the normal working days and normal working hours 08:00 to 18:00 hours. Where ‘shift’ work is envisaged that should be separately provided for.

In general, rates may be different for: - Normal Working Days

- Sundays - Labour Holidays and at times: - 08:00 to 18:00 hours - 18:00 to 24:00 hours - 00:00 to 04:00 hours - 04:00 to 08:00 hours

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14. DAYWORKS (continued)

14.2 Labour shall be paid for on an hourly basis, in the manner suggested above. There should be no further percentage addition on , the quoted labour rates which will be deemed to include for: (a) Wages, bonuses and all allowances paid to operatives directly engaged on dayworks

(including gangers and charge hands working with their gangs and those operating mechanical plant and transport) in accordance with the appropriate employment agreement, or where no such agreement exists, the actual payments made to the work people concerned;

(b) Site supervision, including the cost of foremen and walking gangers and staff insurances; (c) Establishment charges, overhead charges and profit;

(d) Use and maintenance of small hand tools and appliances, non-mechanical plant and equipment, such as ladders, trestles, stages, bankers, scaffolding, temporary track, wagons, skips, tarpaulins and all similar items.

14.3 The costs of materials in dayworks shall be the nett invoiced costs, including delivery to site. A schedule may be given containing provisional quantities of different materials for the work to be carried out on a dayworks basis.

A percentage item shall be given to enable the Contractor to quote for the inclusion of establishment charges, overhead charges and profit.

14.4 The costs of construction plant and vehicles (excluding the cost of operators and drivers who shall be included in labour above) shall be paid for at the rates entered in the schedule for the net working hours during which the plant is engaged on dayworks, and excluding any standing or idle time, except that plant held on standby by written request from the Architect shall be paid for. The quoted rates will be deemed to include for:

(a) Transportation costs for plant not already available on the site;

(b) Site supervision, hire charges, insurances, consumable stores, fuel and maintenance. A percentage item shall be given to enable the Contractor to quote for the inclusion of

establishment charges, overhead charges, profit and for any further costs imposed by the above limitations.

15. PROVISIONAL AND PRIME COST SUMS

15.1 The use of the terms ‘Provisional Sums’ and ‘Prime Cost Sums’ shall be made in conformity with the following definitions unless otherwise provided in the Conditions of Contract:

(a) The term ‘Provisional Sum’ shall mean a sum provided for work or for costs which cannot be entirely foreseen, defined or detailed at the time the tendering documents are issued;

15. PROVISIONAL AND PRIME COST SUMS (continued)

(b) The term ‘Prime Cost Sum’ shall mean a sum provided for work or services to be executed by a Nominated Sub-Contractor or for materials or goods to be obtained from a Nominated Supplier. Such sum shall be deemed to be exclusive of any profit or attendance required by the Contractor and provision shall be made for the addition thereof.

16. WORK UNDER RESERVOIR, RIVER OR SEA WATER

16.1 All work executed in or under reservoir, river or sea water shall be given separately stating the levels of high and low water where applicable.

17. WORK IN COMPRESSED AIR

17.1 All work required to be carried out in compressed air shall be given separately.

18. WORK OUTSIDE THE CURTILAGE OF THE SITE

18.1 Work outside the curtilage of the site shall be separately identified.

19. WORK IN EXISTING BUILDINGS

19.1 Work in existing buildings shall be separately identified. Such work is defined as work on, or in, or immediately under work existing before the current project.

19.2 Where the premises are occupied, this shall be stated and any restrictions on access or timing or disposal of debris, and disposition of plant and materials, shall be given.

19.3 Where the Contractor is required to arrange access to tenanted areas, separately with each tenant, this shall be stated and the work kept separate from the work in common areas.

20. TEMPORARY WORKS

20.1 Where the Contractor is required to provide, or to take over existing, temporary works,

descriptions shall include, where appropriate, references to provision and erecting or taking over and repairing, maintaining (duration stated), adapting (details stated), handing over to the Employer or succeeding Contractor or clearing away and making good all works disturbed.

(18)

(19)

APPENDIX “A” to Section II - GENERAL PRINCIPLES

Being Classification of Building Services Works into Systems for Billing Purposes.

DISPOSAL SYSTEMS

Laboratory/Industrial Waste Drainage Sewage Pumping/Treatment Incineration Plant

PLUMBING AND WATER SUPPLY, AIR, PETROL, FUEL OIL AND GAS SYSTEMS

Sanitary & Laboratory Fittings

Soil, Waste, Ventilation and Rainwater Pipes Gutters

Potable Water Hot and Cold Water Pressurised Water Flushing Water Irrigation Grey Water Fountains/Water Features Treated/Deionised/Distilled Water Swimming Pool Water Treatment Air and Gas Supply and Distribution Compressed/Instrument Air Medical/Laboratory Gas Natural Gas

Liquid Petroleum Gas Vacuum

Steam

FIRE SERVICES INSTALLATION

Fire Hose Reels Wet Risers Sprinklers Deluge Fire Hydrants Gas Fire Fighting Foam Fire Fighting Fire Detection and Alarm Chilled Water

Cooling Water

Systems, together with their equipment, pipework, ductwork, insulation, trunking, ducting, cable trays, conduits and sundries shall be classified as follows and given under appropriate headings. The wordings in this list are for reference only, and actual wording should follow those used in the drawings and specifications.

VENTILATION/AIR-CONDITIONING/HEATING/REFRIGERATION SYSTEMS Sea Water Cooling Water Chilled Water Condensate Drainage General Supply/Extract Toilet Extract Kitchen Extract Car Parking Extract

Smoke Extract/Smoke Control Safety Cabinet/Fume Cupboard Extract Fume Extract

Anaesthetic Gas Extract Dust Collection Air-Conditioning

Window/Wall/Split Type Air-Conditioning Units Air Curtains

ELECTRICAL SUPPLY/POWER/LIGHTING SYSTEMS

Electrical Generation Plant

HV Supply/Distribution/Public Utility Supply LV Supply/Public Utility Supply

General Lighting and Small Power Extra Low Voltage Supply DC Supply

Uninterrupted Power Supply Electric Underfloor Heating Local Electric Heating Units

(20)

APPENDIX “A” to Section II - GENERAL PRINCIPLES (continued)

Being Classification of Building Services Works into Systems for Billing Purposes.

Systems, together with their equipment, pipework, ductwork, insulation, trunking, ducting, cable trays, conduits and sundries shall be classified as follows and given under appropriate headings. The wordings in this list are for reference only, and actual wording should follow those used in the drawings and specifications.

COMMUNICATIONS/SECURITY/CONTROL SYSTEMS

Telecommunications Staff Paging/Location

Public Address/Sound Amplification Centralised Dictation Radio/TV/CCTV Projection Advertising Display Clocks Data Transmission Access Control

Security Detection and Alarm Earthing and Bonding Lightning Protection Electromagnetic Screening

(21)

INFORMATION PROVIDED MEASUREMENT RULES

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION

(See Section II - General Principles)

1. Generally

Where practicable the nature of the soil shall be described and attention drawn to any existing trial holes.

S.1 Special requirements in respect of upholding and maintaining the sides of earthworks S.2 Whether or not

blasting is permitted and any special restrictions regarding same given S.3 Any requirements in

respect of phasing or sequencing of excavation

CLASSIFICATION TABLE MEASUREMENT

RULES

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 2. Site clearance 1. Cutting down trees nr

2. Cutting down trees which are not in an open site area or are in an area without vehicular access, details stated

3. Removal of existing tree stumps, where trees have been cut down by others 4. Clearing site of tall

grass, shrubs, bushes, and the like and trees ≤ 0.60 m girth

5. Cutting turf to be preserved

1. Girth 0.60 - 0.90 m 2. Girth in further stages

of 0.30 m

1. Method of storing and preservation and location where turf is required to be stacked stated. 1. Method of storage and

location stated

M.1 Tree girths are measured at a height of 1.00 m above ground.

C.1 This work is deemed to include;

(a) Grubbing up roots (b) Disposal of materials (c) Filling voids

S.4 Filling materials

1. Described nr 1. Approximate area stated Item

m2

6. Stripping top soil for preservation

1. Average depth stated

(22)

CLASSIFICATION TABLE MEASUREMENT RULES

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 2. Site clearance

(continued)

7. Disposal of existing spoil heaps or rubbish dumps left by previous contractors

Item

M.2 In measurement of excavation, an additional allowance for working space is included as follows:

(a) 0.25 m from the face of concrete requiring formwork where the formwork does not exceed 0.60 m in height (b) 0.60 m from the face of concrete requiring formwork where the formwork exceeds 0.60 m in height and the bottom of the formwork exceeds 0.60 m below the starting level of the excavation (c) 0.60 m from the finished face of work below ground level where externally applied damp-proof coverings or protection walls are required or where the method of construction requires workmen to operate from the outside M.3 Disposal of excavated

materials are measured

D.1 The term planking and strutting means everything requisite to uphold the face of excavation other than shoring as required to be measured under item (a).5 hereof and covers the Contractor’s responsibility for upholding and maintaining the sides of earthwork by whatever means are considered necessary. m2

1. Removal from site to a specified dumping area provided by Employer 2. Removal from site to a

tip provided by Contractor

C.2 This work is deemed to include for:

(a) Excavating from the spoil heaps

(b) All multi-handling to and from temporary spoil heaps as and if necessary

(c) Transport to specified dump area; or provision of, and transport to shoot, dump or tip

C.3

(a) This work is deemed to include for excavating in any ground encountered, getting out excavated materials by any means necessary, all levelling or grading and ramming bottoms, trimming sides, planking and strutting and any extra excavation required therefor. (b) See item (a).5 hereof for temporary shoring and supports for excavation into banks for retaining walls and similar constructions with a face height > 1.50 m. (c) Any additional excavation for working space, to that included in M.2, that the Contractor may consider necessary and for the subsequent backfilling.

1. Surface excavation ≤ 0.20 m in average depth

3. Excavating 1. Average depth stated

(23)

47

RULES

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 3. Excavating

(continued)

2. Excavation to reduce levels over site > 0.20 m in average depth

m3 _{M.2 and M.3 apply.}

M.4 The quantities given are the bulk before excavating and no allowance is made for subsequent variations to bulk or for extra space beyond the allowances made below. M.2, M.3 and M.4 apply C.3 applies. S.2 applies. m3 m3 m3

VI

EXCAVATION

1. In successive stages of 1.50 m 1. Commencing levels stated. D.1 applies. 3. Excavation to reduce levels into sides of banks 4. Basements and similar

excavations

M.2, M.3 and M.4 apply. M.5 Basements and

similar excavations are measured to the outside of the foundations, subject to M.2 (working space clause) hereof; existing voids are deducted. M.2, M.3 and M.4 apply. M.6 Where trenches exceed 1.00 m in depth a minimum width of 0.75 m is measured. M.2, M.3, M.4 and M.5 apply. M.2, M.3 and M.4 apply. M.7 Where these excavations exceed 1.50 m in depth a minimum measurement on plan of 1.25 m x 1.25 m is taken for excavation.

C.3 applies. C.4 Backfilling and

disposal of surplus excavated material are deemed to be included. 5. Surface trenches

m3

6. Trenches below basement level 7. Excavation for column

or stanchion bases, isolated piers, manholes and the like, each given separately

m3

nr 8. Post holes ≤ 0.30 m3

(24)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 3. Excavating

(continued)

9. Trenches for curbs and the like

1. Average depth stated in multiples of 0.25 m 2. Size of curbs and the

like stated

m 1. Trenches for curbs and the like without beds, and those to be laid on beds are each measured separately, and commencing levels stated.

1. Trenches for pipes without beds, and those to be laid on beds are each measured separately and commencing levels stated.

NOTE: Trenches for drain pipes and for pipe ducts are measured under Section IX Drainage.

C.3 and C.4 apply. S.2 applies.

m

D.1 applies.

1. Average depth stated in multiples of 0.25 m 2. Pipes or cables ≤ 55 mm diameter 3. Pipes or cables > 55 mm and ≤ 110 mm diameter 4. Pipes or cables ≥ 110 mm diameter, sizes stated 10. Trenches for service

pipes, cables and the like

4. Items extra over any type of excavation

11. Trenches for multiple pipes, cables and the like

m

m2

1. Breaking up and removing pavings, surface concrete and the like 2. Breaking up and

removing brickwork or blockwork and the like met with in excavations 3. Breaking up any

removal of stone masonry walls or slab foundations and the like met with in excavations

4. Breaking up unreinforced concrete and the like met with in excavations

5. Breaking up reinforced

m3

C.5 This work is deemed to include for additional cost of disposal. 1. Extra over any

excavation irrespective of depth

m3

1. Average depth stated in stages of 0.25 m 2. Sizes, numbers and

relative positions of pipes or cables stated 1. The thickness if known

stated

(25)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 5. Temporary shoring

and supports

1. For sides of excavation into banks for retaining walls or similar constructions, with face height > 1.50 m

Item

1. Specified locations, details stated

M.4 applies.

C.6 This work is deemed to include for any extra excavation required therefor and for the subsequent backfilling.

S.2 applies.

6. Disposal

1. Minimum and maximum face heights above reduced level and approximate overall length stated

1. Deposited on site m3 _{C.7 The work is deemed}

to include for all multi-handling to and from temporary spoil heaps as and if necessary. C.8 This work is deemed

to include for: (a) All multi-handling to and from temporary spoil heaps as and if necessary (b) Transport to specified dump area

C.9 This work is deemed to include for:

(a) All multi-handling to and from temporary spoil heaps as and if necessary (b) Provision of, and transport to, shoot, dump or tip

2. Removed from site to a specified dumping area provided by Employer

m3 _{1. Dumping area stated}

m3

3. Removed from site to a tip provided by Contractor 1. Of excavated material

2. Of existing spoil heaps or rubbish dumps left by previous contractors

(26)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 7. Backfilling to

excavation

1. ≤ 0.30 m in depth, average depth stated 2. > 0.30 m in depth

(where part exceeds 0.30 m in depth, the whole is given cube)

1. Arising from excavation 2. Obtained from materials

on site

3. Obtained from specified off-site area

4. To be provided by Contractor from his own sources

m2

---1. Selected, details stated 2. Special filling materials,

details stated 3. Top soil 4. Fabricated, details stated M.8 Filling into excavations is measured as equal to the void to be filled.

C.7 applies. S.5 Method of compaction S.6 If deposited and

compacted in layers this is stated, giving thickness of layers.

8. Filling to make up levels or for forming embankments or terraces

9. Filling into planters and the like, positions stated if not at ground level 10. Hardcore or granular filling m2 ---m3 1. Beds 2. Handpacked vertical beds 3. Handpacked beds sloping ≥ 15O_{from the}

horizontal

4. Filling to make up levels

M.9 Filling to make up levels or for forming embankments or terraces is measured after compaction. 1. ≤ 0.30 m in depth

2. > 0.30 m in depth, (where part exceeds 0.30 m in depth, the whole is given cube)

m3

m2 _{M.9 applies.}

M.10 Thickness of beds and filling to make up levels etc. is measured after compaction.

S.5 and S.6 apply. S.7 Kind and quality of

material m3

1. Materials to be used stated

11. Handpacking slopes and vertical faces of hardcore or other filling materials 12. Blinding to surfaces of hardcore or other filling materials m2 m3 m2

(27)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 13. Surface treatments 1. Formation of slopes

in filling

2. Formation of slopes to cuttings

3. Trimming exposed surfaces of rock to produce fair face 4. Preparation of existing

ground or subsoil areas for application of top soil for turfing

5. Consolidation of sub-grade for roads and pavings

6. Herbicide, selective weed killer or insecticide treatments

1. Method of preparation stated

m2

M.11 Turfing and grass seeding work is measured in accordance with Section XXII (b). a S.8 Tolerances m2 m2 m2 m2 _{S.9 Method of compaction}

14. Turfing and grass seeding

m2

15. Chunam surfacing 1. Sloping ≤ 1 in 7 2. Sloping > 1 in 7

1. Details of mix and thickness to be applied stated

1. Fully described

m2 _{C.10 This work is deemed}

to include for any necessary scaffolding and hoisting materials up and down slopes. 16. Sprayed concrete surfacing to slopes m2 nr m2 _{M.12 Steel mesh} reinforcement may be included in the description. M.13 Alternatively steel

mesh reinforcement may be measured separately in accordance with Section VII (c).5.

(a)

Excavation (continued)

3. Formation of weep holes

(28)

M.14 Measured in accordance with Section V (b).6

S.10 Requirements in respect of preparation of surface, straightening and bending projecting reinforcement and any necessary protection

17. Cutting or burning through steel sheet piling to remove that not required for permanent works

18. Withdrawing steel sheet piling installed by others

nr

M.15 Measured in accordance with Section V (b).8

M.16 Measured in accordance with Section V (c).12

M.17 Measured in accordance with Section V (d).11

M.18 Measured in accordance with Section V (e).8

M.19 Measured in accordance with Section V (f).8

M.20 Measured in accordance with Section V (g).9

19. Cutting off heads of concrete piles

20. Cutting off heads of steel piles

21. Breaking up caisson lining above level of concrete core 22. Preparation of top of

caisson for raising on 23. Cutting off top of

diaphragm walls to required levels

1. Thickness stated

(a)

Excavation

1. Precast concrete piles 2. Cast in-situ piles 3. Bored piles

1. Size of caisson stated

M.21 Measured in accordance with Section V (h).7

(29)

(b)

Underpinning

1. Generally

A description of the work to be underpinned shall be given, stating the length, the depth of the underpinning and the limit of the length to be carried out in one operation.

RULES

INFORMATION PROVIDED MEASUREMENT

RULES

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 2. Temporary supports to work to be underpinned S.1 Particulars given where practicable Item M.1 Underpinning work, including concrete, brickwork, tanking and the like is given under a separate heading.

(30)

(b)

Underpinning (continued)

M.2 and M.4 of Sub-section (a) hereof apply. M.2 Allowances for

working space are made in measurement of excavation. The width of the working space (measured horizontally from the face of the wall to be underpinned, or where projecting foundations are to be retained, from the face of such projection) shall be related to the depth of the excavation (measured from the commencing levels to the underside of the underpinning work). The allowances are made

as follows, irrespective of any physical restriction or design constraints: (a) 1.00 m from the wall or projecting foundation where the total depth of the excavation does not exceed 1.50 m (b) 1.50 m from the wall or projecting foundation where the total depth of excavation exceeds 1.50 m but does not exceed 3.00 m (c) 2.00 m from the wall or projecting foundation where the total depth of the excavation exceeds 3.00 m

3. Excavation 1. Preliminary excavation down to the base of work to be underpinned 2. Excavation below the

base of work to be underpinned

1. In successive stages of 1.50 m, commencing levels stated

m3 _{1. From one side only}

2. From both sides

D.1 of Sub-section (a) hereof applies. D.2 The commencing

level is defined as the commencing level of the preliminary excavation.

C.3 of Sub-section (a) hereof applies.

S.2 Physical restrictions if known and any design constraints stated

(31)

(b)

Underpinning (continued)

4. Items extra over excavation irrespective of depth 5. Cutting away projecting foundations 1. Brickwork 2. Stonework 3. Mass Concrete 4. Reinforced concrete, including cutting reinforcement

1. Maximum width and depth of projection stated

m

M.3 Items extra over are measured in accordance with item (a).4 hereof.

6. Concrete 7. Formwork 8. Reinforcement 9. Brickwork 10. Tanking M.4 Concrete, formwork, reinforcement, brickwork and tanking are measured in accordance with the appropriate Trades.

(32)

(33)

(See Section II - General Principles)

1. Generally S.1 Composition and mix

(or strength requirement) of the concrete S.2 Particulars of any

tests required, both of materials and the finished work S.3 Requirements for compaction S.4 Requirements for placing in position by a particular method, or pouring at stated speeds. Work to which these requirements apply given separately

(a)

Concrete

M.1 Labours to existing work are measured. M.2 All concrete work is

measured cube except as hereinafter provided. M.3 Thickness of beds,

slabs, walls and the like is stated.

M.4 Any treatment of the face of concrete, other than that required by Sub-section (d) C.3 hereof, beyond ordinary depositing, spreading and levelling are measured separately and given super.

M.5 Reinforced concrete and watertight reinforced concrete are each given separately. M.6 Concrete in casing to structural steelwork is given separately. M.7 Plain concrete required to be vibrated is so described.

C.1 Each item of concrete work is deemed to include for forming grooves (other than in fair faced concrete to form ornamental features), chases, mortices, grouting in balusters, bolts, dowels and the like with cement, holes for pipes, etc., ≤ 150 mm diameter, openings ≤ 0.025 m2_{sectional area,}

and the required steel trimming bars to these holes and openings and making good and any other sundry items of a like nature.

C.2 Reinforced concrete is deemed to include for vibration.

(34)

1. Generally (continued) M.8 Generally concrete

slabs, walls, columns, beams, stairs and the like are given separately. M.9 Concrete, formwork

and reinforcement are each given separately except as hereinafter and herein before provided. M.10 No deductions are

made for:

(a) voids ≤ 0.05 m3_in

work given cube where the thickness is not stated in the description (b) the volume of reinforcement or the structural steel sections embedded in the concrete or cast-in accessories (c) openings in walls, floors, roof slabs, roadways and the like ≤ 0.10 m2_{in work where the}

thickness is stated and is < 500 mm (if over 500 mm thick and the void exceeds 0.05 m3_{it is to}

be deducted)

(35)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 2. Small bases for

fencing posts etc. 3. Concrete beds

1. Sizes stated nr

NOTE - For Structural movement joints see item (a) 28 hereof

C.3 Laying in bays and the necessary formwork to the joints between bays deemed to be included C.4 Laying or finishing to

falls, currents or cambers deemed to be included C.5 Extra excavation,

disposal, hardcore and formwork deemed to be included

C.6 Any extra costs in curved work deemed to be included

C.7 Angles, ends, outlets and intersections deemed to be included

C.8 Rebates for channel covers deemed to be included

1. Excavation, disposal, formwork and rendering described

1. Thickness stated m3

1. Straight channels 2. Curved channels m

1. Width and thickness stated

4. Thickening to concrete beds, under walls, partitions and the like and under channels

M.11 Channels in level ground and sloping channels are measured together.

m 1. Shape, width,

thicknesses of sides and base and average depth stated. Expansion joints and spacing described

5. Surface water channels 6. Stepped channels to slopes 7. Channels formed in concrete beds 8. Foundations 9. Isolated stanchion or column bases 10. Pile caps 1. Excavation, disposal, formwork and rendering described

2. Any weep holes in steps described 1. Formwork described m m m3 _{1. Foundations include} attached stanchion or column bases

(a)

Concrete (continued)

1. Shape, width, thicknesses of sides and base and average depth stated. Height of steps and gradient of channel between steps stated and any weep holes in steps described

1. Shape, width and average depth stated

(36)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 11. Blinding under

foundations and beams 12. Cement grouting

under steel column bases or under steel grillages 13. Curbs 14. Copings 15. Projecting cills 16. Strings 17. Similar items 1. Thickness stated m3 m2 m3

(a)

Concrete (continued)

1. Mix and thickness stated

(37)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 18. Suspended slabs

19. Coffered and troughed slabs

1. Attached beams 2. Isolated and tie beams

m3 _{1. Horizontal}

2. Sloping ≤ 15O

3. Sloping > 15O

M.12 The measurement of suspended slabs is taken across columns and beams, except where the columns or beams are of a different mix.

M.13 Where a shoulder of richer mix is required at these junctions, or at junctions of columns and beams, the items are so described.

M.14 The measurement of beams below slabs and of upstand beams is taken between columns. M.15 The stated thickness

of coffered and troughed slabs is the thickness measured overall.

C.4 applies.

C.9 Shoulders of different mix are deemed to include for any additional formwork or permanent mesh separation barriers required to form the shoulders.

m3

D.1 Coffered and troughed slabs include margins whose width is < 500 mm. Wider margins are included with ordinary slabs.

D.2 The descriptions of slabs and beams of horizontal, sloping ≤ 15O

and sloping > 15O_relate

to the top surface.

20. Beams 21. Ground beams

(38)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 22. Casings to structural steelwork 1. Thickness stated m3 _{1. Casings to beams} 2. Casings to stanchions 1. Walls 2. Retaining walls

M.16 Concrete walls are measured between columns or projections and up to the soffits of beams and slabs. M.17 If the width of a

column exceeds four times its thickness, it is classified as a wall.

23. Walls

M.18 All concrete in stairs, including stairs, support beams, strings, landings (other than landings forming part of main floor slabs) and aprons are measured together in the item of stairs.

m3

25. Concrete in stairs

1. Fully described

(a)

Concrete (continued)

M.19 Measured nett volume 24. Columns m3 m3 nr 26. In-situ concrete in filling between and over hollow blocks in suspended slabs 27. Hollow blocks in

(39)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 28. Structural movement

joints

1. Between two wall faces 1. Descriptions include steel dowels, formwork, fillers, temporary fillets and surface coatings and formation of rebates or other labours.

m2 _{M.20 Water stops in}

structural movement joints are measured separately under item (a).31 hereof. m nr m m 29. Pointing to structural movement joints m 1. Plane 2. Curved C.10 Running joints deemed to be included 2. In beds 3. In suspended slabs 4. In walls 5. In beams 6. In columns 1. Straight 2. Curved M.21 Measured separately from the joints

7. Across beams 8. Across curbs 9. Similar items 1. Cover strips 2. Cover plates 3. Fire stops 1. Straight 2. Curved 3. Joints at intersections 4. Special junction pieces,

including joints

1. Straight 2. Curved

nr

(a)

Concrete (continued)

30. Cover strips, cover plates and fire stops to structural movement joints

31. Water stops

1. Sizes stated,

descriptions include steel dowels, formwork, fillers, temporary fillets and surface coatings and formation of rebates or other labours. 1. Sizes stated, or where

there are a large number of similar items, the items may be grouped in ranges of sizes, descriptions to include steel dowels, formwork, fillers, temporary fillets and surface coatings and formation of rebates or other labours. 1. Descriptions include

backing rods or materials

1. Dimensioned description

(40)

DEFINITION RULES COVERAGE RULES SUPPLEMENTARY INFORMATION 32. Accessories and

sundry items cast into in-situ concrete

1. Bonding ties 2. Steel angle column

guards

3. Spout or weep pipes 4. Step irons

5. Others, details stated

1. Dimensioned description m2 ---m ---nr M.22 Cast-in accessories are normally enumerated. Linear or area measure may be used provided that any appropriate spacing dimensions are given in descriptions. 1. Spacing dimensions

stated

D.3 Cast-in accessories exclude reinforcement, tying wire, distance blocks, spacers, chairs, structural steelwork, hollow blocks and fillers blocks, permanent formwork, joints and all components around which concrete is cast, but which are not fixed by the Concretor (e.g. electrical and plumbing

components, doors and windows etc.).

C.11 Perforations or recesses in formwork deemed to be included

S.5 Kind and quality of materials and sizes or manufacturer’s references

1. Dimensioned description, description to include for bedding and holding down bolts as appropriate

33. Bridge bearing pads for concrete bridges, and the like

(b)

Gun Applied Reinforced Concrete

RULES

1. Slabs 1. Thickness stated m2 _{S.1 Kind and quality of}

materials

S.2 Preparatory work S.3 Method of application

and finish

S.4 The relative positions of gun applied members S.5 Permissible loads in relation to casting times 1. Tops 2. Soffits 1. Straight 2. Curved M.1 Gunite sprayed surface to slopes is measured in Section VI Excavation. 2. Walls 3. Beams 4. Columns 5. To slopes m2

(a)

Concrete (continued)

nr

(41)

(c)

Reinforcement

1. Generally

RULES

2. Bar reinforcement kg

S.1 Quality of steel stated S.2 Particulars given of

any tests required S.3 Any special

restrictions in regard to hot or cold bending 1. Nominal size stated 1. General reinforcement

2. General reinforcement > 12 m in length, given in stages of 3 m

3. Links, stirrups and binders

4. Spacers and chairs designed by the Engineer 5. Helical reinforcement 6. Reinforcement bent to curve 1. Round bars 2. Indented bars 3. Square bars M.2 Only couplers included in the Engineer’s design are measured.

C.1 Variations in weight due to rolling margin deemed to be included C.2 Cutting to lengths,

and bending deemed to be included

C.3 Tying wire, precast concrete or proprietary spacer blocks and chairs and supports (other than spacers, chairs and supports designed by the Engineer) and ordinary spacer rods deemed to be included

3. Threading ends of bars for couplers by others

4. Couplers

1. Sizes of bars stated

1. Fully described

nr nr

1. Flat fabric

2. Fabric specially bent to curve.

C.4 Couplers, other than those included in the design deemed to be included

C.5 Threading ends of bars, where required, is deemed to be included. C.6 Notchings around

obstructions and bending deemed to be included M.3 Fabric reinforcement

is measured the nett area covered.

M.4 No deduction is made for openings ≤ 1.00 m2_.

m2

1. Weight stated 1. Descriptions include the

extra materials in laps which are also described 1. Described in detail including manufacturer’s reference m 5. Fabric reinforcement 6. Proprietary anti-burglar reinforcement.

M.1 Each type of steel is given separately, e.g. Mild Steel, High Yield Steel, etc.