Uniscaff...inspection. Tower should be tiedto existingstructure at each lift(i.e. 2m verticalcentres) using horizontal tiesat each side that securely fixto the existingstructure and

Telephone: + 44 (0) 151 524 2434Fax (Sales): + 44 (0) 151 524 2430Email: [email protected]

George Roberts (NW) LimitedUnit D WakefieldRoadNetherton LiverpoolL30 6TZ UK Issue1:2016

George RobertsTotal Reliability of Supply


• Tubes • Scaffold • Staircases • Beams • Formwork • Fencing • Tubes • Scaffold • Staircases • Beams • Formwork • Fencing


Uniscaff

UniscaffUserGuide

www.scaffoldingsales.co.uk

Registered in Cardiff. 2728193GEORGE ROBERTS (NORTHWEST) LTD Vat No. 618 5719 17

K-Lok User GuideK-Lok User GuideK-Lok User Guide

2

Contents

Introduction 3

General Notes 4

Detailed Component List 5

KeyFeaturesofUniscaff 8

StepbyStepErectionGuide 9

UniscaffGeorge RobertsTotal Reliability of Supply

over 500 milesof scaffolding


22 3

UniscaffTowerAssemblyInstructionsIntroduction

TheUniscaffStairTowerismadefrompre-fabricatedcomponentsandbuiltusingstandards,ledgerbeams,stairflights,landings,handrailsandguardrails.Thestairtowercanbebuiltasanindependentconstructionorintegratedintootherscaffoldingorstaging.

AllcomponentsaremadeofgalvanisedsteelandconformtothestructuralrequirementsofBSEN12811ndBSEN12810withregardstothecomponenttestingandcalculationrequirements.Allcomponentshaveouridentificationmarkswithmonthandyearofmanufacture.

UniscaffUniscaff

UniscaffAccessTowerMaximumPeopleTable

TowerHeight

MaximumNo. Personnel

2 m

4 m

6 m

8m 31

10 m 37

12 m 44

14 m 50

16m 58

18m 64

20 m 71

22 m 77

24m 84

26 m 91

TowerHeight


28m 98

30 m 99

32 m 94

34 m 94

36 m 90

38m 89

40m 85

42m 85

44m 81

46m 80

48m 76

50 m 75


4 21

UniscaffTowerAssemblyInstructionsUniscaffTowerAssemblyInstructions

Base Jacks

TheBaseJacksareadjustableinheighttoensurethetowerisbothlevelandstableonunevenground.

Note:Alwaysuseminimumadjustmentheighttoachievefinalplatformheight.

Standards

Standardsare1m,2mand3minlengthandareusedaccordingtotheheightoftowerbeingbuilt.

Beams

TheUniscaffstairtowerisbuiltusing1.6mand3.0mledgerbeamswith2.0m,1.5mand1.0mbetweentheplatformlevels.

Anchorage

TheUniscaffstairtowermustbeanchoredtoastructureateachplatformlevelonbothsidesoftheinnerandouterstandardsusingscaffoldtubeandcouplers.

LoadsonFlightsandLandings

Stairflightsandlandingshaveasafeworkingloadof1.5kN/sq.m

Loads on Standards

Thestairtowerwhenusing2.0mplatformheightshasapermissibleloadingof20kNperstandard.

Handrails

Allstairflightsandlandingsareequippedwithaminimumofdoublehandrails.Anadditional3.0msinglehandrailisaddedtotheexternalareaona2.0mstairflight.

ConstructionHeights

Themaximumconstructionheightforastairtowerwithplatformlevelsandstairflightseverytwometresis30.0m.Thestairflightsmusthavehandrailsontheinsideofeverystairflight.Thelandingsmusthaveguardrailsat1.0mand0.5mheights.

IMPORTANTNOTICEForstairtowerconstructionsnotcoveredbythiserectionguidepleasecontactthetechnicalsalesteamattheaddressonthereverseofthisguide.

Long FaceParallel to Building

MaximumTowerHeight(m)

In Country InTown

SValuetobeascertainedsubjecttosite

20 30 30

24 30 30

28 30 30

32 14 14

36 4 8

40 - 4

DerivedfromOutofServiceCondition-Criticalupto30m

ShortFaceParallel to Building


In Country InTown



20 30 30

24 30 30

28 30 30

32 30 30

36 30 30

40 20 20

UniscaffAccessTowerSafeHeightTables


20 5


UniscaffCOMPONENT LIST

Standard Size 1.0m Code 1601005 Wt(Kg) 6.00

Size 2.0m Code 1601003 Wt(Kg) 11.70

Size 3.0m Code 1601002 Wt(Kg) 17.28

Base Jack Code 1601001 Wt(Kg) 4.10

Clip-on Post Code 1601055 Wt(Kg) 5.3

ErectionPlatform Code 1601035 Wt(Kg) 13.0

Ledger Beam Size 1.6m Code 1601011 Wt(Kg) 9.6

Size 3.0m Code 1601010 Wt(Kg) 18.17

UniscaffAccessTowerUserGuideAddendumNotes

●Where structure is not available atthe lift heights then a scaffold bracingsystemshouldbeusedtoprovideatietotheliftbacktoapositionofeffectiverestraint or theGeorgeRoberts (NorthWest)LtdTechnicalServicesDepartmentcontactedforadvice.

SafeWorkingHeightTablesNotes

Tablesarebasedonamaximumheightof30m,heightsabovethisarepossiblebuttheseshouldbereferredtoGeorgeRoberts (NW) Ltd Technical ServicesDepartmentoracompetenttemporaryworksengineer.

The User Guide utilises wind loadingin the preparation of its safe workingheighttablesforthestairtowers.Thesetables are limited to “S” values above20 and below 40. Where localisedconditions result in “S” values outsideof these parameters the wind velocitypressures may either be lower thanor exceed those utilised within thecalculations fromwhich the tables arederived. Stair towers located on sitesat the edges of cliffs or escarpments,incoastal locationsortotallstructuressurrounded by other tall structureswhich may cause funnelling of thewind pressure are all susceptible tosignificant increases in wind pressuredue to local effects. In these instancesit is recommended that advice issought from the George Roberts (NW)Ltd Technical Service Department or acompetenttemporaryworksengineer.

Ifthesiteis;atleast2Kminsideatownterrain, is shielded by buildings within100m and the average height of thesurrounding buildings are 5m or morethenitisclassifiedasa“Town”site.Allother locations are considered to be“Country”.

The safe height tables and sectioncapacities contained within the UserGuidearebaseduponliveloadingfromtheintendeduseonly.Additionalloadingmay accrue on the working platformsor components as a consequence ofatmospheric precipitations such asice, snow, sand or dust. The workingprocesses may also cause debris suchas sand, grit or demolition debris toaccumulate on the working platformof components which will increasethe live loading above that allowedfor within the live loading.Where thisis seen to occur or is know will occurfurtherguidanceshouldbesoughtfromtheGeorgeRoberts (NW)LtdTechnicalServices Department or a competent temporary works designer which mayresult in a down grading of the LoadClassforthescaffold.

GeneralNotes

PriortoerectionallUniscaffstairtowercomponents should be inspected fordamage by the erectors. DO NOT usedamaged components within theerectedtower.

The system utilises fully galvanisedcomponents which will be suitablefor storage in exposed areas andgenerally the components should bemaintenance free. Should there be aloss of the galvanising layer such thatcorrosiondepositsstarttooccurorthecomponentsaredamagedduringuseorstoragethenthecomponentshouldbereturnedtoGeorgeRoberts(NW)Ltdforreplacement.


6 19


Uniscaff

TopEndGuardFrame

Guardrail

Guardrail Frame

Folding Guard Frame

Handrail Post

Size 1.6m Code 1601022 Wt(Kg) 3.30

Size 2.16m Code 1601021 Wt(Kg) 5.20

Size 3.0m Code 1601020 Wt(Kg) 9.75

Size 1.6m Code 1601016 Wt(Kg) 10.09

Size 3.0m Code 1601015 Wt(Kg) 14.49

Code 1601055 Wt(Kg) 5.30

Code 1601070 Wt(Kg) 8.10

Code 1601014 Wt(Kg) 4.90

● Towermustbeerectedonastablebasewhichwillpreventexcessivesettlement.Spreader plates should be used asnecessary. The foundations should beadequate to carry and disperse theload imposed both locally at eachstandard and, in general, to carry thewhole weight of the stair tower. Theresponsibility for the adequacy of thefoundations should be establishedand approved prior to erection. Theclient for the stair tower and / or thecontractor may need to be consulted.Thefoundationforastairtowershouldbemaintainedinanadequateconditionduring the life of the tower. Regularinspectionproceduresmustbeprovidedandusesuspended if there is found tobeanylossofsupport.

● Towermustbeerectedagainstasoundandinherentlystableexistingstructure,upon which it relies for stability. Alltowers will impose forces upon thestructure they are fixed to throughtheir ties. An assessment should beinitially made regarding the ability ofthestructuretosustaintheloadseitherglobally, due to its own instability,or locally as a result of defectivefinishes.Loadingsfromthetiesintothesupporting structure are dependantupon the live loading to the stairtower, itsheightand inthemajorityofcases the wind loading imposed uponthe tower and its cladding status. Forguidance with regards to the designof ties into building facades wewouldreferyoutoSection5ofTG20:08ortotheGeorgeRoberts (NW)LtdTechnicalServices Department or a competent temporaryworksdesigner

● InaccordancewiththerequirementsofBSEN12811theDesignloadis1kN/

m2,or1.5kNpositioned inworstcaseposition for element of tower underinspection.

● Towershouldbetiedtoexistingstructureat each lift (i.e. 2m vertical centres)using horizontal ties at each side thatsecurely fix to the existing structureand to the inner and outer standard.Additional components outside thesystems standard component set mayberequiredtoenableuseinaccordancewith this User Guide. These willnormallyconstituteloosetubestoEN39andfittingstoEN74.

● Wheretowerhastheshortfaceparallelto the existing structure, additionalties should be provided at each liftfromtheouterstandardsat45degreesback to the existing structure. Theseadditional ties are to be securely fixedto the existing structure and the fixingis assumed to be capable of resistinghorizontal forces both parallel andperpendiculartotheplaneofthewall.

● Thetowerisassumedtobeuncladandfree from netting and sheeting, suchthattheonlyareapresentedtothewindisthatofthecomponentsofthetower.

● Thepersonnelcapacity table is limitedto amaximum area load of 3 kN/m2forpracticalreasons.

● For the personnel capacity table, oneperson is assumed to weigh 100 Kg,exertingaforceofapproximately1kN.

● Throughout the calculations themaximum design load on any standardhasbeentakenas35.6kNwherethe3mface isparallel to the structureand41.6kNwheretheshortfaceisparalleltothestructure.


COMPONENT LIST


18 7


UniscaffUniscaff

StairFlight

Stair Handrail

Landing

Entrance Step

Size 1.0m Code 1601032 Wt(Kg) 28.27

Size 1.5m Code 1601041 Wt(Kg) 27.20

Size 2.0m Code 1601049 Wt(Kg) 33.00

Size 1.0m Code 1601042 Wt(Kg) 8.80

Size 1.5m Code 1601041 Wt(Kg) 9.39

Size 2.0m Code 1601040 Wt(Kg) 10.40

Code 1601043 Wt(Kg) 25.10

Code 1601060 Wt(Kg) 14.60

IMPORTANTNOTICEFor stair tower constructions not covered by thiserection guide please contact the technical salesteamattheaddressonthereverseofthisguide.

COMPONENT LIST


8 17

UniscaffTowerAssemblyInstructions

Uniscaff

UniscaffKeyFeatures

Guardrail Frame

Top End Guard Frame

Guard Rail

Ledger Beam

Hand Rail

Base Jack

Folding Guard Frame

Clip On Post

Wall Tie

Standard

Stair Flight

Landing

Entrance step

25.Entrance/exitattopoftower.Erector1issafelystandingonlandingandhookedontocentreof1.6mledgerbeam.Hefits3mguardrailframewitherector2safelystandingonerectingplatformatoppositeendoftower,hookedonto1.6mledgerbeam.Erector1thenfitstopguardframeintohandrailpostandlandingasabove.

26.SIDE EXITErector1issafelystandingonlandingandfitsclip-onposttoinsideledgerbeam.Erector2standingonerectingplatformatoppositeendoftowerhookedonto1.6mledgerbeam.Bothoperatorsthenfit2.16mguardrailsintoclip-onpostandstandard,ensuringlockingcatchesareengaged.Theexitisthencomplete.

27.END EXITErector1issafelystandinqonlanding.Erector2isstandingonerectingplatformatoppositeendoftowerclippedonto1.6mledgerbeam.Bothoperatorsthenfit3mguardrailframeateachsideoftower.Remove1.6mguardfromlandingposition.Theexitisthencomplete.


16 9


UniscaffUniscaff

1.Startbysettingoutthesolepadsandthebaseplatesandpositionthestandards,ledgerbeamsandtransombeams.Placebasejacksontosolepadsandthenadjusttoapproximatelyfinalheight.

2.Placestandardsontobasejacks,makingsurethepocketsfaceintherightdirection.

3.Connect3metreledgerbeamtothehigherlevelpockets.Connectthe1.6mledgerbeamstolowerlevelpockets.

22.Fitguardrailframestofaceandendoftower.Fitledgerbeamstonextliftrequired(at1m,1.5or2m).Re-hooktoupperledger,closetostandards

23.Atthispoint,makesureyoutieinbeforeerectingnextlift.

24.ForfurtherIiftsrepeatprocedures8,9and12-17untilyoureachfinalexitoramidexitpoint.


10 15


UniscaffUniscaff

4.Engagealllockingcatchesasyouproceed.

5.Usingatapemeasure,checkdistancefromstructure

6.Levelfirstliftbyadjustingbasejacksasnecessary.Dothisinaclockwisedirection.

19.Re-positionerectingplatformontonextliftdirectlyabovelowerlanding.

20.Erector1climbsstairflightandfitstemporaryclip-onposttoledgerbeamclosetoerectingplatform.Hethenhooksontoledgerbeamand,usingclip-onpostforsupport,climbsontoerectingplatform.NB: Post only used to aid climbing onto exposed landing

21.Seconderectornowclimbsstairflighttolanding,hooksontoledgerbeamclosetostandard.Standardsarenowaddedtoallfourlegs.(Youcan now move the clip-on post to a safe place until it is needed again)


14 11


Uniscaff

7.Checkbaseliftissquareusingatapemeasure

8.Placefirstlanding(A)onledgerbeams.Thenplacetheerectingplatform(B)attheoppositeendofthebay.Nowbotherectorsshouldinstallthesecondlevelofledgerbeams.At this point check the drawings for 1m, 1.5m or 2m lift heights.

9.Nowinstallthesecondlanding-initiallyabouthalfametrefromtheendofthebay.

16.FitGuardrailFramesandGuardrailstotheoutsidefaceofthestairflight.

17.Theleaderectorclipsontomidpointofledgerbeam.Botherectorsfitstairhandrailpostintotopandlowerlandings.Then,stairhandrailislocatedintothehandrailpostandlockingcatchesengaged.

Usepigtailtoensurepostcannotmove.

18.Fitfoldingguardframeintohandrailpostandstandardatentrancetostair.


12 13


UniscaffUniscaff

10.Fit the entrance step to the stairtower.

11.Thetowermustbeanchoredtothestructureoneachplatformlevelusingscaffoldtubeandcouplersconnectedtoboththeinnerandouterstandards.

12.Thestairflightisinstalledbyfirstpositioningverticallyandlocatingthebaseintothepocketsonthelowerlanding....

13.Theflightisthenloweredontothelandingabove

14.Thelandingisthenpushedalonguntil......

15....thetopofthestairflightisfullylocatedintothepocketsoftheupperlanding.


12 13


UniscaffUniscaff

10.Fit the entrance step to the stairtower.

11.Thetowermustbeanchoredtothestructureoneachplatformlevelusingscaffoldtubeandcouplersconnectedtoboththeinnerandouterstandards.

12.Thestairflightisinstalledbyfirstpositioningverticallyandlocatingthebaseintothepocketsonthelowerlanding....

13.Theflightisthenloweredontothelandingabove

14.Thelandingisthenpushedalonguntil......

15....thetopofthestairflightisfullylocatedintothepocketsoftheupperlanding.


14 11


Uniscaff

7.Checkbaseliftissquareusingatapemeasure

8.Placefirstlanding(A)onledgerbeams.Thenplacetheerectingplatform(B)attheoppositeendofthebay.Nowbotherectorsshouldinstallthesecondlevelofledgerbeams.At this point check the drawings for 1m, 1.5m or 2m lift heights.

9.Nowinstallthesecondlanding-initiallyabouthalfametrefromtheendofthebay.

16.FitGuardrailFramesandGuardrailstotheoutsidefaceofthestairflight.

17.Theleaderectorclipsontomidpointofledgerbeam.Botherectorsfitstairhandrailpostintotopandlowerlandings.Then,stairhandrailislocatedintothehandrailpostandlockingcatchesengaged.

Usepigtailtoensurepostcannotmove.

18.Fitfoldingguardframeintohandrailpostandstandardatentrancetostair.


10 15


UniscaffUniscaff

4.Engagealllockingcatchesasyouproceed.

5.Usingatapemeasure,checkdistancefromstructure

6.Levelfirstliftbyadjustingbasejacksasnecessary.Dothisinaclockwisedirection.

19.Re-positionerectingplatformontonextliftdirectlyabovelowerlanding.

20.Erector1climbsstairflightandfitstemporaryclip-onposttoledgerbeamclosetoerectingplatform.Hethenhooksontoledgerbeamand,usingclip-onpostforsupport,climbsontoerectingplatform.NB: Post only used to aid climbing onto exposed landing

21.Seconderectornowclimbsstairflighttolanding,hooksontoledgerbeamclosetostandard.Standardsarenowaddedtoallfourlegs.(Youcan now move the clip-on post to a safe place until it is needed again)


16 9


UniscaffUniscaff

1.Startbysettingoutthesolepadsandthebaseplatesandpositionthestandards,ledgerbeamsandtransombeams.Placebasejacksontosolepadsandthenadjusttoapproximatelyfinalheight.

2.Placestandardsontobasejacks,makingsurethepocketsfaceintherightdirection.

3.Connect3metreledgerbeamtothehigherlevelpockets.Connectthe1.6mledgerbeamstolowerlevelpockets.

22.Fitguardrailframestofaceandendoftower.Fitledgerbeamstonextliftrequired(at1m,1.5or2m).Re-hooktoupperledger,closetostandards

23.Atthispoint,makesureyoutieinbeforeerectingnextlift.

24.ForfurtherIiftsrepeatprocedures8,9and12-17untilyoureachfinalexitoramidexitpoint.


8 17

UniscaffTowerAssemblyInstructions

Uniscaff

UniscaffKeyFeatures

Guardrail Frame

Top End Guard Frame

Guard Rail

Ledger Beam

Hand Rail

Base Jack

Folding Guard Frame

Clip On Post

Wall Tie

Standard

Stair Flight

Landing

Entrance step

25.Entrance/exitattopoftower.Erector1issafelystandingonlandingandhookedontocentreof1.6mledgerbeam.Hefits3mguardrailframewitherector2safelystandingonerectingplatformatoppositeendoftower,hookedonto1.6mledgerbeam.Erector1thenfitstopguardframeintohandrailpostandlandingasabove.

26.SIDE EXITErector1issafelystandingonlandingandfitsclip-onposttoinsideledgerbeam.Erector2standingonerectingplatformatoppositeendoftowerhookedonto1.6mledgerbeam.Bothoperatorsthenfit2.16mguardrailsintoclip-onpostandstandard,ensuringlockingcatchesareengaged.Theexitisthencomplete.

27.END EXITErector1issafelystandinqonlanding.Erector2isstandingonerectingplatformatoppositeendoftowerclippedonto1.6mledgerbeam.Bothoperatorsthenfit3mguardrailframeateachsideoftower.Remove1.6mguardfromlandingposition.Theexitisthencomplete.


18 7


UniscaffUniscaff

StairFlight

Stair Handrail

Landing

Entrance Step

Size 1.0m Code 1601032 Wt(Kg) 28.27

Size 1.5m Code 1601041 Wt(Kg) 27.20

Size 2.0m Code 1601049 Wt(Kg) 33.00

Size 1.0m Code 1601042 Wt(Kg) 8.80

Size 1.5m Code 1601041 Wt(Kg) 9.39

Size 2.0m Code 1601040 Wt(Kg) 10.40

Code 1601043 Wt(Kg) 25.10

Code 1601060 Wt(Kg) 14.60

IMPORTANTNOTICEFor stair tower constructions not covered by thiserection guide please contact the technical salesteamattheaddressonthereverseofthisguide.

COMPONENT LIST


6 19


Uniscaff

TopEndGuardFrame

Guardrail

Guardrail Frame

Folding Guard Frame

Handrail Post

Size 1.6m Code 1601022 Wt(Kg) 3.30

Size 2.16m Code 1601021 Wt(Kg) 5.20

Size 3.0m Code 1601020 Wt(Kg) 9.75

Size 1.6m Code 1601016 Wt(Kg) 10.09

Size 3.0m Code 1601015 Wt(Kg) 14.49

Code 1601055 Wt(Kg) 5.30

Code 1601070 Wt(Kg) 8.10

Code 1601014 Wt(Kg) 4.90

● Towermustbeerectedonastablebasewhichwillpreventexcessivesettlement.Spreader plates should be used asnecessary. The foundations should beadequate to carry and disperse theload imposed both locally at eachstandard and, in general, to carry thewhole weight of the stair tower. Theresponsibility for the adequacy of thefoundations should be establishedand approved prior to erection. Theclient for the stair tower and / or thecontractor may need to be consulted.Thefoundationforastairtowershouldbemaintainedinanadequateconditionduring the life of the tower. Regularinspectionproceduresmustbeprovidedandusesuspended if there is found tobeanylossofsupport.

● Towermustbeerectedagainstasoundandinherentlystableexistingstructure,upon which it relies for stability. Alltowers will impose forces upon thestructure they are fixed to throughtheir ties. An assessment should beinitially made regarding the ability ofthestructuretosustaintheloadseitherglobally, due to its own instability,or locally as a result of defectivefinishes.Loadingsfromthetiesintothesupporting structure are dependantupon the live loading to the stairtower, itsheightand inthemajorityofcases the wind loading imposed uponthe tower and its cladding status. Forguidance with regards to the designof ties into building facades wewouldreferyoutoSection5ofTG20:08ortotheGeorgeRoberts (NW)LtdTechnicalServices Department or a competent temporaryworksdesigner

● InaccordancewiththerequirementsofBSEN12811theDesignloadis1kN/

m2,or1.5kNpositioned inworstcaseposition for element of tower underinspection.

● Towershouldbetiedtoexistingstructureat each lift (i.e. 2m vertical centres)using horizontal ties at each side thatsecurely fix to the existing structureand to the inner and outer standard.Additional components outside thesystems standard component set mayberequiredtoenableuseinaccordancewith this User Guide. These willnormallyconstituteloosetubestoEN39andfittingstoEN74.

● Wheretowerhastheshortfaceparallelto the existing structure, additionalties should be provided at each liftfromtheouterstandardsat45degreesback to the existing structure. Theseadditional ties are to be securely fixedto the existing structure and the fixingis assumed to be capable of resistinghorizontal forces both parallel andperpendiculartotheplaneofthewall.

● Thetowerisassumedtobeuncladandfree from netting and sheeting, suchthattheonlyareapresentedtothewindisthatofthecomponentsofthetower.

● Thepersonnelcapacity table is limitedto amaximum area load of 3 kN/m2forpracticalreasons.

● For the personnel capacity table, oneperson is assumed to weigh 100 Kg,exertingaforceofapproximately1kN.

● Throughout the calculations themaximum design load on any standardhasbeentakenas35.6kNwherethe3mface isparallel to the structureand41.6kNwheretheshortfaceisparalleltothestructure.


COMPONENT LIST


20 5


UniscaffCOMPONENT LIST

Standard Size 1.0m Code 1601005 Wt(Kg) 6.00

Size 2.0m Code 1601003 Wt(Kg) 11.70

Size 3.0m Code 1601002 Wt(Kg) 17.28

Base Jack Code 1601001 Wt(Kg) 4.10

Clip-on Post Code 1601055 Wt(Kg) 5.3

ErectionPlatform Code 1601035 Wt(Kg) 13.0

Ledger Beam Size 1.6m Code 1601011 Wt(Kg) 9.6

Size 3.0m Code 1601010 Wt(Kg) 18.17


●Where structure is not available atthe lift heights then a scaffold bracingsystemshouldbeusedtoprovideatietotheliftbacktoapositionofeffectiverestraint or theGeorgeRoberts (NorthWest)LtdTechnicalServicesDepartmentcontactedforadvice.

SafeWorkingHeightTablesNotes

Tablesarebasedonamaximumheightof30m,heightsabovethisarepossiblebuttheseshouldbereferredtoGeorgeRoberts (NW) Ltd Technical ServicesDepartmentoracompetenttemporaryworksengineer.

The User Guide utilises wind loadingin the preparation of its safe workingheighttablesforthestairtowers.Thesetables are limited to “S” values above20 and below 40. Where localisedconditions result in “S” values outsideof these parameters the wind velocitypressures may either be lower thanor exceed those utilised within thecalculations fromwhich the tables arederived. Stair towers located on sitesat the edges of cliffs or escarpments,incoastal locationsortotallstructuressurrounded by other tall structureswhich may cause funnelling of thewind pressure are all susceptible tosignificant increases in wind pressuredue to local effects. In these instancesit is recommended that advice issought from the George Roberts (NW)Ltd Technical Service Department or acompetenttemporaryworksengineer.

Ifthesiteis;atleast2Kminsideatownterrain, is shielded by buildings within100m and the average height of thesurrounding buildings are 5m or morethenitisclassifiedasa“Town”site.Allother locations are considered to be“Country”.

The safe height tables and sectioncapacities contained within the UserGuidearebaseduponliveloadingfromtheintendeduseonly.Additionalloadingmay accrue on the working platformsor components as a consequence ofatmospheric precipitations such asice, snow, sand or dust. The workingprocesses may also cause debris suchas sand, grit or demolition debris toaccumulate on the working platformof components which will increasethe live loading above that allowedfor within the live loading.Where thisis seen to occur or is know will occurfurtherguidanceshouldbesoughtfromtheGeorgeRoberts (NW)LtdTechnicalServices Department or a competent temporary works designer which mayresult in a down grading of the LoadClassforthescaffold.

GeneralNotes

PriortoerectionallUniscaffstairtowercomponents should be inspected fordamage by the erectors. DO NOT usedamaged components within theerectedtower.

The system utilises fully galvanisedcomponents which will be suitablefor storage in exposed areas andgenerally the components should bemaintenance free. Should there be aloss of the galvanising layer such thatcorrosiondepositsstarttooccurorthecomponentsaredamagedduringuseorstoragethenthecomponentshouldbereturnedtoGeorgeRoberts(NW)Ltdforreplacement.


4 21


Base Jacks

TheBaseJacksareadjustableinheighttoensurethetowerisbothlevelandstableonunevenground.

Note:Alwaysuseminimumadjustmentheighttoachievefinalplatformheight.

Standards

Standardsare1m,2mand3minlengthandareusedaccordingtotheheightoftowerbeingbuilt.

Beams

TheUniscaffstairtowerisbuiltusing1.6mand3.0mledgerbeamswith2.0m,1.5mand1.0mbetweentheplatformlevels.

Anchorage

TheUniscaffstairtowermustbeanchoredtoastructureateachplatformlevelonbothsidesoftheinnerandouterstandardsusingscaffoldtubeandcouplers.

LoadsonFlightsandLandings

Stairflightsandlandingshaveasafeworkingloadof1.5kN/sq.m

Loads on Standards

Thestairtowerwhenusing2.0mplatformheightshasapermissibleloadingof20kNperstandard.

Handrails

Allstairflightsandlandingsareequippedwithaminimumofdoublehandrails.Anadditional3.0msinglehandrailisaddedtotheexternalareaona2.0mstairflight.

ConstructionHeights

Themaximumconstructionheightforastairtowerwithplatformlevelsandstairflightseverytwometresis30.0m.Thestairflightsmusthavehandrailsontheinsideofeverystairflight.Thelandingsmusthaveguardrailsat1.0mand0.5mheights.

IMPORTANTNOTICEForstairtowerconstructionsnotcoveredbythiserectionguidepleasecontactthetechnicalsalesteamattheaddressonthereverseofthisguide.

Long FaceParallel to Building


In Country InTown


20 30 30

24 30 30

28 30 30

32 14 14

36 4 8

40 - 4


ShortFaceParallel to Building


In Country InTown



20 30 30

24 30 30

28 30 30

32 30 30

36 30 30

40 20 20

UniscaffAccessTowerSafeHeightTables


22 3

UniscaffTowerAssemblyInstructionsIntroduction

TheUniscaffStairTowerismadefrompre-fabricatedcomponentsandbuiltusingstandards,ledgerbeams,stairflights,landings,handrailsandguardrails.Thestairtowercanbebuiltasanindependentconstructionorintegratedintootherscaffoldingorstaging.

AllcomponentsaremadeofgalvanisedsteelandconformtothestructuralrequirementsofBSEN12811ndBSEN12810withregardstothecomponenttestingandcalculationrequirements.Allcomponentshaveouridentificationmarkswithmonthandyearofmanufacture.

UniscaffUniscaff

UniscaffAccessTowerMaximumPeopleTable

TowerHeight


2 m

4 m

6 m

8m 31

10 m 37

12 m 44

14 m 50

16m 58

18m 64

20 m 71

22 m 77

24m 84

26 m 91

TowerHeight


28m 98

30 m 99

32 m 94

34 m 94

36 m 90

38m 89

40m 85

42m 85

44m 81

46m 80

48m 76

50 m 75


2

Contents

Introduction 3

General Notes 4

Detailed Component List 5

KeyFeaturesofUniscaff 8

StepbyStepErectionGuide 9

UniscaffGeorge RobertsTotal Reliability of Supply

over 500 milesof scaffolding

Telephone: + 44 (0) 151 524 2434Fax (Sales): + 44 (0) 151 524 2430Email: [email protected]

George Roberts (NW) LimitedUnit D WakefieldRoadNetherton LiverpoolL30 6TZ UK Issue1:2016



• Tubes • Scaffold • Staircases • Beams • Formwork • Fencing • Tubes • Scaffold • Staircases • Beams • Formwork • Fencing


Uniscaff

UniscaffUserGuide

www.scaffoldingsales.co.uk

Registered in Cardiff. 2728193GEORGE ROBERTS (NORTHWEST) LTD Vat No. 618 5719 17

Documents

Uniscaff...inspection. Tower should be tiedto existingstructure at each lift(i.e. 2m verticalcentres) using horizontal tiesat each side that securely fixto the existingstructure and