BS1187:1959

Incorporating

BRITISHSTANDARD

AmendmentNo.1

Specificationfor

Woodblocksforfloors

1

BS1187:1959

Co-operatingorganizations

TheTimberIndustryStandardsCommittee,underwhosesupervisionthis

BritishStandardwasprepared,consistsofrepresentativesfromthefollowing

Governmentdepartmentsandscientificandindustrialorganizations:

BritishDoorAssociation

BritishFurnitureTradeConfederation

BritishRailways,theBritishTransportCommission

BritishWoodChipboardManufacturers’Association

D.S.I.R.—ForestProductsResearchLaboratory*

EnglishJoineryManufacturers’Association(Incorporated)

FibreBuildingBoardDevelopmentOrganizationLtd.

FlushDoorManufacturers’Association

InstitutionofCivilEngineers

InstitutionofMunicipalEngineers

InstitutionofStructuralEngineers

MinistryofHousingandLocalGovernment

MinistryofWorks

NationalFederationofBuildingTradesEmployers

NationalSawmillingAssociation

RoyalInstituteofBritishArchitects*

RoyalInstitutionofCharteredSurveyors

TimberDevelopmentAssociation*

TimberTradeFederationoftheUnitedKingdom*

TheGovernmentdepartmentandscientificandindustrialorganizations

markedwithanasteriskintheabovelist,togetherwiththefollowing,were

directlyrepresentedontheCommitteeentrustedwiththepreparationofthe

standard.

AssociationofFlooringContractors

HardwoodFlooringManufacturers’Association

IncorporatedAssociationofArchitects&Surveyors

ThisBritishStandard,having

beenapprovedbytheTimber

IndustryStandardsCommittee

andendorsedbytheChairman

oftheBuildingDivisional

Council,waspublishedunder

theauthorityoftheGeneral

Councilon

29September1959

?BSI10-1999

Amendmentsissuedsincepublication

FirstpublishedDecember1944

FirstrevisionSeptember1959

Amd.No.

21

Dateofissue

June1968

Comments

Indicatedbyasidelineinthemargin

ThefollowingBSIreferences

relatetotheworkonthis

standard:

CommitteereferenceTIB/9

DraftforcommentCV(TIB)3883

ISBN0580356906

2

BS1187:1959

Contents

Page

Co-operatingorganizations

Foreword

Insidefrontcover

ii

1

1

1

1

1

1

2

1

2

3

4

5

6

7

Scope

Definitionsandnomenclature

Grade—description

Manufacture

Dimensions

Moisturecontent

Rateofgrowth

AppendixHardwoodsandsoftwoodssuitableforuseasflooring

3

i

?BSI10-1999

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BS1187:1959

Foreword

ThisstandardmakesreferencetothefollowingBritishStandardsandCodeof

Practice:

BS350,Conversionfactorsandtables.

BS565,Glossaryoftermsapplicabletotimber,plywoodandjoinery.

BS881&BS589,Nomenclatureofcommercialtimbersincludingsourcesof

supply.

CP201,Flooringofwoodandwoodproducts—Part1:Woodflooring(board,

strip,blockandmosaic).

Thisstandardmakesavailableforarchitectsandsurveyors,buildersandflooring

contractors,informationregardingminimumrequirementsforwoodblocksfor

floors.

Thechoiceofaspeciesforwoodblocksisinfluencedbyconsiderationofcost,

decorativeproperties,thenatureofthewearingsurfaceanditsabilitytostand

uptotheexpectedtrafficconditions,andthestabilityofthetimber.

Speciesoftimberareavailabletomeettherequirementsofeverytypeoftraffic

condition.Manyhardwoodswillwithstandtheheavydutyofindustrialfloorsand

whereconditionsarelessexactingawiderangeofwoodswillgiveexcellent

service.Alargenumberoftimbersisalsoavailableforthespecialfloorsin

buildingswhereparticularqualitiesinthespeciesarerequired.

Problemsconcerningthesuitabilityofvarioustimberstowithstanddifferent

typesandintensitiesoftrafficaredealtwithindetailinForestProducts

1)

ResearchBulletinNo.40,“Timbersforflooring”.ThisBulletinincludesan

Appendix,reproducedattheendofthestandard,whichclassifieshardwoodsand

softwoodsinvariousgroupsaccordingtotheconditionsofserviceorapplication

asafloor.Thisclassificationoftimbersdoesnotmeanthattheyarenecessarily

availablecommerciallyorthatothertimbersnotspecificallymentionedare

unsuitable.Therearemanyhundredsofdifferentspeciesoftimbermanyofwhich

areverysuitableforflooringanditwouldbeimpracticaltolistthemall.

Itcannotbeemphasizedtoostronglythatnowoodflooringblockwillgive

satisfactoryserviceunlessitislaidinaccordancewithgoodpractice.ACodeof

Practice,CP201,“Flooringofwoodandwoodproducts”,Part1,“Woodflooring

(board,strip,blockandmosaic)”,makesrecommendationsonmethodsoflaying.

Severalnoveltypesofwoodflooringareavailable,someasthinas)in.(10mm),

butcompletestandardizationoftheseblocksisimpracticablebecauseofthe

varyingtechniquesofmanufacture,someofwhicharethesubjectofBritish

patents.Itisconsidereddesirable,however,thatthesetypesofflooringshould

conformtothisBritishStandardinsofarasitcanbeapplicabletothem.

NOTE

WheremetricequivalentshavebeengiventhefiguresinBritishunitsaretoberegardedas

thestandard.Themetricconversionsareapproximate.Moreaccurateconversionsshouldbebasedon

theTablesinBS350.

ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofa

contract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.

CompliancewithaBritishStandarddoesnotofitselfconferimmunity

fromlegalobligations.

Summaryofpages

Thisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,

pages1to7andabackcover.

Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehad

amendmentsincorporated.Thiswillbeindicatedintheamendmenttableonthe

insidefrontcover.

1)ObtainablefromH.M.StationeryOffice.

ii

?BSI10-1999

4

BS1187:1959

1Scope

4Manufacture

ThisBritishStandardrelatesthehardwoodand

softwoodblocksexcludingendgrainblocksfor

layingonlevelconcreteorothertypesofrigidlevel

bases,andspecifiestheminimumrequirementsfor

dimensions,gradedescriptions,andmethodsof

manufacture.ItincludesanAppendixtakenfrom

theForestProductsResearchLaboratory

BulletinNo.40,“Timbersforflooring”,givingalist

ofsuitabletimbersformanufactureofwoodblocks

fordifferentapplications.

Hardwoodandsoftwoodblocksshallbefreefrom

anyofthedefectsduetomanufacturingdefinedin

BS565.

2)

Aninterlockingmethodofjointingsuchasthe

tongueandgrooveshallbeused.

Achamferorgrooveshallbemachinedalongthe

bottomofbothlongitudinaledgesofthewoodblock

totakeupsurplusadhesive.

5Dimensions

2Definitionsandnomenclature

Thedimensionsofthewoodblockatthetimeof

deliveryshallconformtothefollowing:

ThedefinitionsofthetermsusedinthisBritish

StandardaregiveninBS565,“Glossaryofterms

applicabletotimber,plywoodandjoinery”,andthe

nomenclatureconformstoBS881and589,

“Nomenclatureofcommercialtimbers,including

sourcesofsupply”.

a)Thefinishedthicknessshallbenotless

than/in.(21mm)withaclearwearing

13

16

thicknessofnotlessthan/8in.(10mm)above

3

theinterlockingsystem.

b)Themaximumwidthoffaceshallnot

exceed3/2in.(89mm).

1

3Grade—description

c)Thelengthshallbenotless

than6in.(152mm)normore

than15in.(381mm).

Themorecommonlengthsarewithinthe

range9in.(229mm)to12in.(305mm).

a)Hardwoods.Hardwoodblocksshallbefree

fromallsignsofdecayandinsectattackexcept

forpinholestotheextentspecifiedbelow,and

shallhavethefacefreefromalldefects.

Occasionalpinknotsandbrightsapwoodarenot

considereddefects.

d)Anyonepackageorbundleshallcontainwood

blocksofasinglespecies,thickness,width,length

andtypeofmanufactureonly.

b)Softwoods.Softwoodblocksshallbefreefrom

allsignsofdecayandinsectattack,exceptfor

pinholestotheextentspecifiedbelow,andshall

havethefacefreefromalldefects.Occasional

tightsoundknots,withtheoveralldimensionof

theknotmeasuredacrossthewidthofthefaceof

theblock(i.e.,thewidthbetweenlinestouching

theknotandparalleltotheedgesoftheblock)not

greaterthan#in.(19mm),andbrightsapwood

arenotconsidereddefects.

6Moisturecontent

Themoisturecontentofhardwoodandsoftwood

blocksshallbeadjustedtosuittheconditionsunder

whichthebuildingisultimatelytobeused.Itis

essentialthattheaverageconditionsoftemperature

andhumidityinthebuildingbefore,duringand

afterlaying,shallapproximatetothosewhich

prevailorwillprevailduringoccupation.Theranges

ofmoisturecontentaregiveninthefollowingtable:

Onthebackofanywoodblocksdefectsother

thandecayandinsectattackshallbepermitted,

providedtheydonotimpairthefittingofthe

interlockingsystemorthelayingofthefloor.

Typeofheating

Rangesofmoisture

contentattimeofdelivery

Intermittentheating

Continuousheating

12to15percent.

9to12percent.

6to10percent.

Pinholesinbothhardwoodsandsoftwoodsnot

1

greaterthan/16in.(1.6mm)indiametershall

bepermitted,providedthattheyarenotclosely

clusteredandalsothatonly20percentofthe

pieceor25percentoftheparcelisaffected.

(Thepin-wormisaborerwhichcannotlivein

timberafterthetreeisfelledanddried.)

Under-floorheating

a

aNotsuitableforsoftwoodflooring.

NOTE

Whereheatingpanelsareembeddedinthefloorsor

ceilingsitisnecessarytokilndrywoodblockstoamoisture

contentlowerthantheminimumofthelowestrangegivenabove.

Colourvariationinbothhardwoodandsoftwood

blocksshallbepermitted.

2)BS565,“Glossaryoftermsapplicabletotimber,plywoodandjoinery

1

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BS1187:1959

7Rateofgrowth

Therequirementsforrateofgrowthconsiderations

applyonlytosoftwoodblocks.Thenumberofgrowth

rings,seenonthecross-sectionofthewoodblocks,

onaline1in.(25mm)inlengthperpendicularto

thedirectionoftherings,shallbenotlessthansix

normorethantwenty,unlessthematerialcontains

morethanone-thirdofsummerwood(thedark

portionofthegrowthring).

Ifa1in.linecannotbeobtainedonthecross-section

themeasurementsshallbemadeoveraslongaline

aspossible.

2

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BS1187:1959

AppendixHardwoodsandsoftwoodssuitableforuseasflooring

DepartmentofScientificandIndustrialResearch,ForestProductsResearch

AppendixtoBulletinNo.40

Timbersforflooring

ThehardwoodsandsoftwoodslistedinthisAppendixarerecommendedasbeingsuitableforuseas

flooring,mainlyinwoodstrip,woodblock,orboardform,butnotasend-grainblocks.Thelistisnot

exhaustiveandtheomissionofanyparticularspeciesoftimberdoesnotimplythatitisnecessarily

unsuitableforflooring.Ontheotherhandtheinclusionofatimberinthelistdoesnotimplythatitis

alwaysreadilyavailableonthemarket.Thosetimbersmentionedasespeciallysuitedtoparticular

conditionsofservicecanbeusedunderotherconditionswhentheypossessthenecessaryqualifications.

Somespecieshavethereforebeenincludedinoneormoregroups.Itshouldbeappreciated,however,that

thevarioustimbersindicatedassuitableforanyparticularserviceconditionsmaynotallbeequally

suitableineveryaspect.

I.Thefloorforpedestriantraffic

a)HeavyTraffic

Intensitiesof2000personsperdayandupwards,usuallyconcentratedindefinitetrafficlanes,asin

publicinstitutions,barracks,industrialcanteens,corridorsinlargeschools,colleges,etc.

Timber

a

Weight

57

48

b

Timber

Weight

Afina(Strombosiapostulata)

Africanpadauk(Pterocarpussoyauxii)

Bangawanga(Amblygonocarpus

obtusangulus)

Bubinga(Guibourtiademeusei)

Burmapadauk(Pterocarpus

macrocarpus)

Danta(Nesogordoniapapaverifera)

EastAfricanolive(Oleahochstetteri)

Europeanbeech(Fagussylvatica)

Europeanoak(Quercusroburand

Q.petraea)

Guarabu(Astroniumspp.)

Haldu/kwao(Adinacordifolia)

Hornbeam(Carpinusbetulus)

Japanesemaple(Acerspp.)

Loliondo(Oleawelwitschii)

Makarati(Burkeaafricana)

Malayankeruing(Dipterocarpusspp.)

Missanda(Erythrophleumguineense

andE.ivorensis)

Mora(Moraexcelsa)

56

64

61

55

53

54

60

65

50

46

54

58

62

50

Mfunda(Cynometnawebberi)

Mugonha(Adinamicrocephala)

Mugonyone(Apodytesdimidiata)

Muhimbi(Cynometraalexandri)

Muhuhu(Brachylaenahutchinsii)

Nkunya(Manilkaracuneifolia)

Pangapanga(Millettiastuhlmanii)

Pillarwood(Cassipoureaelliottii)

Purpleheart(Peltogynespp.)

Pyinkado(Xyliadolabriformis)

Rhodesiancopalwood(Guibourtia

coleosperma)

52

47

55

43

44

49

42

46

44

50

61

49

50

57

46

44

60

“Rhodesianteak”(Baikiaeaplurijuga)

Rockmaple(Acersaccharum)

Serrette(Byrsonimaspicata)

Spottedgum(Eucalyptusmaculata)

aStandardnameandbotanicalspecies.ThemajorityofthesearetakenfromBS881andBS589:“NomenclatureofCommercial

Timbers”.

bApproximateweightinlbpercu.ftat12percentmoisturecontent.

3

?BSI10-1999

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BS1187:1959

b)NormalTraffic

Intensitieslessthan2000personsperday,asexperiencedinvillageandassemblyhalls,schooland

collegeclassrooms,hospitals,hotels,canteens,offices,shops,etc.

Timber

Weight

Timber

Weight

Speciesundera)with

Africanceltis(Celtisspp.)

Afrormosia(Afrormosiaelata)

Afzelia(Afzeliaspp.)

Malayankapur/NorthBorneokapur

(Dryobalanopsspp.)

Mengkulang(Tarrietiaspp.)

Merbau(Intsiabijuga)

49

46

47

48/44

44

48

Americanpitchpine(Pinuspalustrisand

P.elliottii)mainlyrift-sawn

Apitong(Dipterocarpusspp.)

Ayan(Distemonanthusbenthamianus)

Darkredmeranti/darkredseraya

(Shoreaspp.)

Mersawa/krabak(Anisopteraspp.)

Muninga(Pterocarpusangolensis)

Musine(Crotonmegalocarpus)

Okwen(Brachystegianigerica)

Opepe(Sarcocephalusdiderrichii)

Ramin(Gonystylusspp.)

39

41

44

42

47

41

41

43

42

43

Grevillea(Africansilky-oak)(Grevillea

robusta)

Guarea(Guareaspp.)

Gurjun(Dipterocarpusspp.)

Iroko(Chlorophoraexcelsa)

Jarrah(Eucalyptusmarginata)

Karri(Eucalyptusdiversicolor)

Kempas(Koompassiamalaccensis)

Keruing(Dipterocarpusspp.)

Makoré(Mimusopsheckelii)

Sapele/utile(Entandrophragmaspp.)

Selanganbatu(Hopeaspp.and

Shoreaspp.)

Sepetir(Pseudosindorapalustris)

“Tasmanianmyrtle”(Nothofagus

cunninghamii)

Teak(Tectonagrandis)

Yang(Dipterocarpusspp.)

Yellowbirch(Betulaalleghaniensis)

40/40

35

38

44/46

41

54

57

54

50

38

54/59

41

37

43

44

43

c)LightTraffic

Thefloorsinresidentialanddomesticbuildings,flats,smallclassrooms,smalloffices.

Timber

Weight

Timber

Weight

Speciesina)andb)with

Abura(Mitragynaciliata)

Lightredmeranti/lightredseraya

(Shoreaspp.)

Manio(Podocarpusspp.)

34

31

31

34

31

43

31

33

32

39

38

33

32

30

47

42

30

33

Afara(Terminaliasuperba)

Africanmahogany(Khayaspp.)

“Africanwalnut”(Lovoaklaineana)

Agba(Gossweilerodendronbalsamiferum)

Dahoma(Piptadeniaafricana)

“Douglasfir”(Pseudotsugataxifolia)

EastAfricancamphorwood

Niangon(Tarrietiautilis)

Matai(Podocarpusspicata)

“Paranapine”(Araucariaangustifolia)

Podo(Podocarpusspp.)

Redwood/Scotspine(Pinussylvestris)

Salignagum(Eucalyptussaligna)

“Tasmanianoak”(Eucalyptusspp.)

Westernhemlock(Tsugaheterophylla)

Whiteseraya(Parshoreaplicata)

Yellowmeranti/yellowseraya

(Shoreaspp.)

(Ocoteausambarensis)

37

42

32

34

Europeanbirch(Betulaspp.)

Gedunohor(Entandrophragmaspp.)

Idigbo(Terminaliaivorensis)

40

4

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BS1187:1959

II.Thedecorativefloor

Thefloorofhighquality,selectedmaterialinresidentialbuildings,hotelrooms,officesandboardrooms,

showrooms,etc.

Timber

Weight

46

Timber

Guarabu(Astroniumspp.)

Weight

49

54

60

41

50

54

58

Afrormosia(Afrormosiaelata)

“Africanwalnut”(Lovoaklaineana)

mainlyrift-sawn

Africanpadauk(Pterocarpussoyauxii)

Andamanpadauk(Pterocarpus

dalbergioides)

Muhimbi(Cynometraalexandri)

Muhuhu(Brachylaenahutchinsii)

Muninga(Pterocarpusangolensis)

Pangapanga(Millettiastuhlmannii)

Purpleheart(Peltogynespp.)

Pyinkado(Xyliadolabriformis)

Rhodesiancopalwood(Guibourtia

coleosperma)

“Rhodesianteak”(Baikiaeaplurijuga)

Sapele(Entandrophragmacylindricum)

selected,quarteredmaterial

Yew(Taxusbaccata)

34

40

49

Burmapadauk(Pterocarpus

macro-carpus)

53

55

EastAfricanolive(Oleahochstetteri)

Europeanoak(QuercusroburandQ.

petraea)selected,quarteredmaterial

Gedunohor(Entandrophragma

angolense)selected,quarteredmaterial.

Grevillea/Africansilky-oak(Grevillea

robusta)

50

57

44

34

35

40

38

III.Theindustrialfloor

a)HeavyDuty

Exceptionallyseveretrafficincludingtruckingandotherimpactloadasinfactories,mills,sortingsheds,

workshops,warehouses,etc.

Timber

Bangawanga(Amblygonocarpus

obtusangulus)

Billian(Eusideroxylonzwageri)

Bubinga(Guibourtiaspp.)

Brushbox(Tristaniaconferta)

EastAfricanolive(Oleahochstetteri)

Greenheart(Ocotearodiaei)

Japanesemaple(Acerspp.)

Mfunda(Cynometrawebberi)

Weight

Timber

Weight

54

60

65

65

48

58

57

46

Muhimbi(Cynometraalexandri)

Muhuhu(Brachylaenahutchinsii)

Nkunya(Manilkaracuneifolia)

Okan(Cylicodiscusgabunensis)

Pillarwood(Cassipoureaelliottii)

Pyinkado(Xyliadolabriformis)

“Rhodesianteak”(Baikiaeaplurijuga)

Rockmaple(Acersaccharum)

Wallaba(Eperuafalcata)

62

64

54

58

55

65

44

61

52

b)LightDuty

Trafficasinclothingandfoodprocessingandotherindustrialestablishmentswithtruckingofalight

nature.

Timber

Weight

Timber

Weight

Hardwoodsundera)with

Danta(Nesogordoniapapaverifera)

Europeanbeech(Fagussylvatica)

Haldu/kwao(Adinacordifolia)

Loliondo(Oleawelwitschii)

Missanda(Erythrophleumguineense

andE.ivorensis)

47

45

42

50

Mugonyone(Apodytesdimidiata)

Rapanea(Rapaneaspp.)

53

55

45

44

63

Sepetir(Pseudosindorapalustris)

Serrette(Byronimaspicata)

Tallowwood(Eucalyptusmicrocorys)

“Tasmanianmyrtle”(Nothofagus

cunninghamii)

57

62

55

Mora(Moraexcelsa)

Mugonha(Adinamicrocephala)

42

43

Yellowbirch(Betulaalleghaniensis)

5

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BS1187:1959

IV.Floorsforspecialpurposes

a)HighImpermeabilitytoChemicalsandAcids

Floorsinsciencelaboratories,etc.

Timber

Afrormosia(Afrormosiaelata)

Afzelia(Afzeliaspp.)

Burmapadauk(Pterocarpus

dalbergioides)

EastAfricancamphorwood

(Ocoteausambarensis)

Europeanoak(Quercusroburand

Q.petraea)

Weight

46

47

Timber

Weight

57

54

50

48

62

47

54

58

Karri(Eucalyptusdiversicolor)

Kempas(Koompassiamalaccensis)

Keruing(Dipterocarpusspp.)

Malayankapur(Dryobalanopsspp.)

Mora(Moraexcelsa)

Opepe(Sarcocephalusdiderrichii)

Purpleheart(Peltogynespp.)

Pyinkado(Xyliadolabriformis)

“Rhodesianteak”(Baikiaeaplurijuga

Spottedgum(Eucalyptusmaculata)

Tallowwood(Eucalyptusmicrocorys)

45

37

44

46

41

54

Gurjun(Dipterocarpusspp.)

Iroko(Chlorophoraexcelsa)

Jarrah(Eucalyptusmarginata)

57

60

63

b)Small“Movement”3)

i)Whereindustrialprocessesinvolvingwidevariationsintemperatureandhumidityarecarriedout

Timber

Bangawanga(Amblygonocarpus

obtusangulus)

Loliondo(Oleawelwitschii)

Missanda(Erythrophleumguineense

andE.ivorensis)

Weight

62

Timber

Weight

54

50

Muhuhu(Brachylaenahutchinsii)

Pangapanga(Millettiastuhlmannii)

“Rhodesianteak”(Baikiaeaplurijuga)

50

56

57

ii)Forresidentialandotherbuildingswithfloorpanelheating

Timber

Hardwoodsunderi)with

Abura(Mitragynaciliata)

Africanmahogany(Khayaspp.)

Afrormosia(Afrormosiaelata)

Afzelia(Afzeliaspp.)

Agba(Gossweilerodendronbalsamiferum)

Ayan(Distemonanthusbenthamianus)

EastAfricancamphorwood

(Ocoteausambarensis)

Weight

Timber

Gedunohor(Entandrophragma

angolense)

Weight

34

31

46

51

31

42

34

38

41

38

41

47

43

Guarea(Guareaspp.)

Iroko(Chlorophoraexcelsa)

Makoré(Mimusopsheckelii)

Muninga(Pterocarpusangolensis)

Opepe(Sarcocephalusdiderrichii)

Teak(Tectonagrandis)

37

3)Smalldimensionalchangeswithatmosphericconditions.

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BS1187:1959

c)TheGymnasiumFloor

Timber

Weight

42

46

Timber

Japanesemaple(Acerspp.)

Loliondo(Oleawelwitschii)

Muninga(Pterocarpusangolensis)

Pillarwood(Cassipoureaelliotii)

Rockmaple(Acersaccharum)

“Tasmanianoak”(Eucalyptusspp.)

Westernhemlock(Tsugaheterophylla)

rift-sawnonly

Weight

44

50

41

46

Ayan(Distemonanthusbenthamianus)

Danta(Nesogordoniapapaverifera)

“Douglasfir”(Pseudotsugataxifolia)

rift-sawnonly

EastAfricanolive(Oleahochstetteri)

Europeanbeech(Fagussylvatica)

rift-sawnonly

Guarea(Guareaspp.)

Gurjun/keruing(Dipterocarpusspp.)

Haldu/kwao(Adinacordifolia)

31

55

46

42

43

38

46/50

42

30

33

43

Whiteseraya(Parashoreaplicata)

Yellowbirch(Betulaalleghaniensis)

Japanesebeech(Fagusspp.)rift-sawn

38

only

d)TheBallroomFloor

Timber

Weight

46

55

Timber

Weight

54

48

57

46

Danta(Nesogordoniapapaverifera)

EastAfricanolive(Oleahochstetteri)

Europeanoak(Quercusroburand

Q.petraea)

Haldu/kwao(Adinacordifolia)

Guarea(Guareaspp.)

Muhimbi(Cynometraalexandrii)

Pillarwood(Cassipoureaelliottii)

“Rhodesianteak”(Baikiaeaplurijuga)

Rockmaple(Acersaccharum)

Sapele/gedunohor(Entandrophragma

spp.)

44

42

38

44

50

40/32

43

Japanesemaple(Acerspp.)

Loliondo(Oleawelwitschii)

Yellowbirch(Betulaalleghaniensis)

e)TheSkatingRinkFloor

Timber

Brushbox(Tristaniaconferta)

EastAfricanolive(Oleahochstetteri)

Japanesemaple(Acerspp.)

Mugonyone(Apodytesdimidiata)

Weight

58

55

44

53

Timber

Weight

65

46

Nkunya(Manilkaracuneifolia)

Rockmaple(Acersaccharum)

Tallowwood(Eucalyptusmicrocorys)

63

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BS1187:1959

BSI—BritishStandardsInstitution

BSIistheindependentnationalbodyresponsibleforpreparing

BritishStandards.ItpresentstheUKviewonstandardsinEuropeandatthe

internationallevel.ItisincorporatedbyRoyalCharter.

Revisions

BritishStandardsareupdatedbyamendmentorrevision.Usersof

BritishStandardsshouldmakesurethattheypossessthelatestamendmen