CESMM4: Civil Engineering Standard of Method and Measurement

98 Pages·2012·0.93 MB·English

by  The Institution of Civil Engineering

Civil Engineering Standard Method of Measurement
Examples

CESMM4
Civil Engineering Standard Method
of Measurement
Examples
Institution of Civil Engineers
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CESMM4CivilEngineeringStandardMethodofMeasurement
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#InstitutionofCivilEngineers2015
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v
Contents Introduction vii
Diagrams ix
Examplebillofquantitiespages
ClassA: Generalitems 2
ClassB: Groundinvestigation 9
ClassC: Geotechnicalandotherspecialistprocesses 12
ClassD: Demolitionandsiteclearance 14
ClassE: Earthworks 15
ClassF: Insituconcrete 19
ClassG: Concreteancillaries 22
ClassH: Precastconcrete 27
ClassI: Pipework–pipes 28
ClassJ: Pipework–fittingsandvalves 30
ClassK: Pipework–manholesandpipeworkancillaries 33
ClassL: Pipework–supportsandprotection,ancillariestolayingandexcavation 36
ClassM: Structuralmetalwork 39
ClassN: Miscellaneousmetalwork 40
ClassO: Timber 41
ClassP: Piles 43
ClassQ: Pilingancillaries 47
ClassR: Roadsandpavings 50
ClassS: Railtrack 53
ClassT: Tunnels 55
ClassU: Brickwork,blockworkandmasonry 58
ClassV: Painting 61
ClassW: Waterproofing 62
ClassX: Miscellaneouswork 64
ClassY: Sewerandwatermainrenovationandancillaryworks 67
ClassZ: Simplebuildingworksincidentaltocivilengineeringworks 74

vii
Introduction TheWorkClassificationdividestheworkwhichiscoveredbytheCivilEngineering
StandardMethodofMeasurement(CESMM)into26classesletteredAtoZ.Eachclass
containsthreetypesofinformation:an‘includesandexcludes’list,aclassificationtable
andatableofrules.
Theincludesandexcludeslistisgivenattheheadofeachclass.Ittellstheuserof
CESMM4whichgeneraltypesofworkareincludedinaclassandwhichclassescover
othersimilarworkwhichisexcludedfromthatclass.Insomecases,forexamplein
classesA,C,D,IandV,thescopeorcoverageoftheitemsinaclassisalsogiven.
TheselistsshouldnotberegardedmerelyasanindextoCESMM4;theyareimportant
totheinterpretationofthecoverageofthebillitemsgeneratedbytheclasses.Clearly
thelistsdonotsetouttobecomprehensive;theydonotmentioneverythingwhichis
includedoreverythingwhichisexcluded.
Theclassificationtableisthetabulationoftheworkcomponentscoveredbyaclass,
dividedintothethreedivisionsasdescribedinsection3.Thehorizontallinesinthe
tabulationindicatewhichlistsoffeaturesfromonedivisionapplytowhichfeaturesin
theotherdivisions.Thisisusuallystraightforward,butmustbegivencloseattention
wherethelinesareatdifferentlevelsinthedifferentdivisions.Headingsaregivenin
somelistsoffeaturesandareprintedinitalicsinCESMM4.Theyshouldbeincludedin
itemdescriptionsinallcaseswheretheywouldnotduplicateinformation.Forexample,
theheading‘CementtoBS12orBS146’,isobviouslyessentialinthedescriptionsfor
itemsF1-3(cid:1) 1-4coveringprovisionofconcreteasotherwisetheinformationabout
cementisnotgiven.
Inmanyplacestheclassificationtableusestheword,‘stated’,inphrases;suchas,
‘Formwork:statedsurfacefeatures’,and,‘Width:statedexceeding300mm’.Writtenin
fullthesephrasesmightbecome:‘Thisitemclassificationisforformworkwhichhasa
particularsurfacefeature.Descriptionsofitemsinthisclassificationshallstatethe
particularsurfacefeaturerequired’and‘Thisitemclassificationisforthingsthewidthof
whichexceeds300mm.Descriptionsofitemsinthisclassificationshallstatetheactual
widthofthethingsrequired’.
Therulesontheright-handpagesareasimportantastheclassificationtables.Inone
sensetheyaremoreimportantassometimestheyoverruletheclassificationtable.The
rulesarearrangedalongsidethesectionsoftheclassificationtowhichtheyapply.Thisis
indicatedbythehorizontallineswhichalignfromtheleft-totheright-handpages.
Rulesprintedaboveadoublelineapplytoallitemsinaclass(seeparagraph3.11).
ThetermswhichareprintedinitalicsintherulesarethosewhichareCESMM4
EXAMPLEStakendirectlyfromtheclassificationtable.Thisstyleofprintingis
adoptedasanaidtocross-referencebetweenthetablesandtherules;ithasnoeffecton
interpretationoftherules.
CESMM4usessomeuntraditionalterms.TheyareadoptedtocomplywithBritish
Standardsortokeepupwiththemovetostandardiseunitsandtermsunderthegeneral
umbrellaofmetrication.Thuspipeshaveaborenotadiameter,becausetheboreisthe
diameteroftheholedownthemiddle,andcannotbeconfusedwiththeoutsidediameter
ofthepipe.Massisthemeasureofthequantityofmatter;weightisnolongerused.
CESMM4referstoweightinonlyoneplacewhereitwasconsideredthatthealternative
phrase‘piecemass’wouldbetotallyunfamiliar.Theabbreviationfornumberis‘nr’.
ExamplebillpagesaregiveninthisbookforeachclassintheWorkClassification.The
examplesarenottakenfromactualcontracts.Theycanbeusedasaguidetothelayout
andstyleofbillsandbillitemscompiledusingCESMM4.Theexamplebillitems,not
beingrelatedtoaparticularjob,showlessnon-standarddescriptionamplifyingthe
basicdescriptionsthanisgiveninrealbills.Similarly,inordernottoimplythat
particularspecificationdetailsarerecommended,itemdescriptionsintheexamplebills
frequentlyrefertohypotheticalspecificationclausesbyaclausenumberortodetailson
hypotheticaldrawings.Thisprocedureispermittedinrealbillsbyparagraph5.12butit
isnotadoptedinthemtothesameextentasithasbeenintheexamplebillpages.
TheexamplesusethecodenumbersintheWorkClassificationasitemnumbers.This
practiceisrecommendedbutisnotarequirementofCESMM4.Itisadoptedatthe
discretionofthebillcompilerinaccordancewithparagraph4.3.
viii
TheexamplesdonotcoveralltheitemswhichcouldbegeneratedbyCESMM4oreven
alltheitemswhichmightoccurinonebill.Theygivehypotheticalitemswhich
demonstratethoseapplicationsoftherulesinCESMM4whicharenovelorwould
benefitfromdemonstrationforotherreasons.Theitemsarelaidoutasiftheywere
pagesfromabilltodemonstratelayout,numberingandtheuseofheadings.The
examplesillustratethealternativeproceduresopentobillcompilerswhereCESMM4
permitsalternatives.Compilersofrealbillsshouldtrytobeconsistent,notto
demonstrateallthepossiblealternativesastheexamplesdo.
Eachheadinganditemdescriptionintheexamplebillpagesendswithafullstop.This
isahelpfuldisciplinewhentherearetwoormoreheadingsatthetopofonebillpage.
Thefullstopshelptorelatetheheadingstothelinesdrawnacrossthedescription
columnwhichshowwhichitemsapplytoeachheading(seeparagraph5.9).Withinitem
descriptions,asemicolonhasbeenusedtoseparatebasicfromadditionaldescription.
Diagrams
Figure1. Application of the
definitionsof thefour surfacesgiven
in paragraphs1.10–1.13.The
Excavated Surfaceforone item
becomestheCommencing Surface
forthe nextitem ifexcavationis
measuredinmore thanonestage
(seealso paragraph5.21)
Figure2.Threeitemsarerequiredfor
this excavation.All can bedescribed
as ‘maximumdepth10–15m’.
Definitionrules1.12and1.13donot
require intermediatesurfacesto be
identified
ix
x
CLASS I: PIPEWORK – PIPES
Includes: Provision, laying and jointing of pipes
Excavating and backfilling pipe trenches
Excludes: Work included in classes J, K, L and Y
Piped building services (included in class Z)
FIRST DIVISION SECOND DIVISION THIRD DIVISION
1 Clay pipes m 1 Nominal bore: not exceeding 200 mm 1 Not in trenches
2 Concrete pipes m 2 200–300 mm 2 In trenches, depth:: not exceeding 1.5 m
3 Iron pipes m 3 300–600 mm 3 1.5–2 m
4 Steel pipes m 4 600–900 mm 4 2–2.5 m
5 Polyvinyl chloride pipes m 5 900–1200 mm 5 2.5–3 m
6 Glass reinforced plastic pipes m 6 1200–1500 mm 6 3–3.5 m
7 High density polyethylene pipes m 7 1500–1800 mm 7 3.5–4 m
8 Medium density polyethylene pipes m 8 exceeding 1800 mm 8 exceeding 4 m
Figure3.Classificationtableforpipes
inclass I. This isthe simplest tablein
CESMM3and showsclearly howthe
threedivisions of classification
combinetoproducebriefdescriptions
andcodenumbersfor groupsof
componentsof civil engineering
works. Inthiscase the brief
descriptions areamplified in billsof
quantitiesby more specific
information givenin accordancewith
the additionaldescriptionrules in
class I
CLASS C
ADDITIONAL
MEASUREMENT RULES DEFINITION RULES COVERAGE RULES DESCRIPTION RULES
M1 The Commencing Surface D1 Drilling and excavation for C1 Items for work in this class
adopted in the preparation of the work in this class shall be deemed shall be deemed to include
Bill of Quantities shall be adopted to be in material other than rock or disposal of excavated material and
for the measurement of the artificial hard material unless removal of dead services.
completed work. otherwise stated in item
descriptions.
M2 The depths of grout holes,
holes for ground anchorages and
drains shall be measured along
the holes irrespective of
inclination.
M3 Drilling through previously A1 The diameters of holes shall
grouted holes in the course of be stated in item descriptions for
stage grouting shall not be drilling and driving for grout holes
measured. Where holes are and grout holes.
expressly required to be
extended, the number of holes
shall be measured and drilling
through previously grouted holes
shall be measured as drilling
through rock or artificial hard
material.
M4 The number of stages
measured shall be the total
number of grouting stages
expressly required.
Figure4. Thelayoutof theclassified
rulesin CESMM3:notethe different
styleofeachofthefourtypesofrule,
the horizontalalignmentand the use
ofthe double horizontalline to
separate rulesof generalapplication
tothe class