identify the significant risks riba - iirsm 2... · riba. designer cdm analysis and options matrix...

Identify the Significant Risks

RIBA

Designer CDM Analysis and Options Matrix - Hazard Identification and Significant Risk Management Project & No:-:- Solent University Campus Work Stage :- D Revision & Date: 7th Issue Aug 16th 2013 HAZARDS and SIGNIFICANT RISKS

BUILDING FORM, MATERIAL, , ACTIVITY, LOCATION

ELIMINATE or AVOID risks (During early design stages) SFARP

REDUCE or MINIMIZE risks ALARP by :- (During all design stages) Safe systems of work & protection >

INFORMATION To be provided with the design eg Specialist Design & client input

CONTROL METHODS Contractor or Client Manage -ment Systems

OTHER SPECIALIST GUIDANCE & COMMENTS Eg. References ACTIONS & DATES

Team Sign -off status Client S. Solent University Architect Scott Brownrigg Struct. Eng SWH (Str) Services Eng WSP (Ser) P. Contractor TBC Others P.M EC Harris CDM-C Scott Brownrigg Landscape Cost Consultant EC Harris

1. Front Entrance screencleaning access

2. Access for MEWP intoAtrium for maintenance.Doors to accommodatesixze of applianceneeded.

3. Atrium Roof ETFEMaintenance

4. Atrium roof ventilatorsaccess for maintenance

5. Light fittings at high level-location for maintenance

6. Protective enclosures forfrequent plantmaintenance staff

7. Mansafe solutions forrope access or MEWPfor elevations cleaningand access

8. Atrium floor to takeMEWP loads andfinishes to be capable ofwithstanding damage ofoutriggers etc.

9. MEWP to reach over Podand floor void to all partsof roof.









3.0 CONSTRUCTION & MAINTENANCE HAZARDS

This section identifies the key strategic constructional safety issues related to the Stage D design. Issue need to be updated or added as the design solution evolves during the later design development stages. This can improve safety as well as speed of construction, and therefore costs with mutual benefits to the workforce, client and contractor

Client and Project Team to develop in later design stages.

3.1 ROOFS

SAFE WORK AT HEIGHT

SLOPING ETFE SHEET ROOFING

FALLS

Roof Plan Roof vents, svps, terminals, etc. tp be considered. Roof construction methods at various inclines to be analysed. Gutter sizes and locations for rainwater and cleaning access . Inspections of roof at completion, defects liability and future annual inspections to be considered.

Cable and anchor restraint systems Specialist subcontractors to be approached on all roofing systems to integrate with other construction activities , materials and design. Safety procedures to be reviewed by team.

3.1 A ETFE ROOF TO ATRIUM

Annual inspections above and below. Irata trained operatives above. MEWP below Self cleaning properties but occasional cleaning (annual) exterenally. Air pipes need access in case of failures, leaks,etc. but only occasional. Netting used during construction for fall protection. Warranty issues to be clarified for frequency and method of access. Structural detailing to be integrated with ETFE in terms of construction and future access.

ProjeHAZASIGNRISK

TeamOther

3.0 CONMAINHAZA3.1 ROO

SAFEHEIG

SLOPSHEE

FALL

3.1.1 TOWFORMMAINAND ACCEPLANPLACREM

ect & No:ARDS and

NIFICANT KS

m Sign -off rs

STRUCTIONTENANCEARDS

FS

E WORK AGHT

PING ETFEET ROOFI

LS

WER BLOCM.

NTENANCEPLANT ESS. NT CEMENT AOVAL

:-:- Sd BU

AC

status CP

ON & E

Thevwo

AT

E NG

Ro

K

E

AND

olent UUILDING FCTIVITY, L

Client SP.M E

his section volves durinorkforce, cl

oof Plan

DesUniversFORM, MA

LOCATION

S. Solent UEC Harris

identifies tng the latelient and co

signersity CaATERIAL, N

University

the key strr design deontractor

r CDM ampus

, ELIMAVOI (Duridesig SFAR

y ArchCDM

rategic conevelopmen

CannoelevataccessinclusiMobileremovstandi

Optio

INATE or D risks ng early n stages) RP

itect SM-C S

structionalnt stages. T

ot eliminateions or roos recommeon and co

e crane for val. Will neeng or road

ons Ma

REDU (DuriSafe s

cott Browcott Brow

l safety issThis can im

e maintenaof so suitabended for dsting purpoplant plac

ed suitable in future.

atrix -

UCE or MIng all desisystems of

wnrigg wnrigg

sues relatemprove saf

ance to ble methoddesign oses.

cement ande hard

Hazard

NIMIZE risign stagesf work & p

Struct. EnLandscap

ed to the Stfety as we

RooconRooincliGutrainInspdefeinsp

d of

d

PoswatearraareawousoluRevfor awor

IdentifWork Stasks ALAR) rotection >

ng SWpe

tage C+ dell as speed

of vents, svsidered.

of construcines to be ter sizes awater and

pections ofects liabilitypections to

ssibility thater fed pole

angementsas but a BMuld seem thution to thevised schema BMU butking at hig

fication age :- C

RP by :-

>

WH (Str)

esign. Issud of constru

vps, termin

ction methoanalysed.

and locationcleaning a

f roof at coy and futur be consid

t opening wes and ropes can be mMU with ache most ape Tower Blome is less t MEWPS c

gh levels .

and SigC

ServCos

e need to uction, and

nals, etc. tp

ods at vario

ns for access . mpletion, re annual ered.

windows , ed access ade in variccess cradppropriate ock. appropriatcould be

gnificanReINFTo withSpe& c

rvices Engst Consulta

be updated therefore

p be

ous

Cab

long

ious dle

te

SAEconapprequ

Pow

nt Risk Mvision & D

FORMATIObe provideh the desigecialist Delient inpu

WSant EC

d or addede costs wit

ble and anc

EMA accresulted asa

propriate tyuirements

wered one

ManageDate: 4

ON ed gn eg esign t

CMCCm

P (Ser) Harris

d as the deth mutual b

chor restra

edited specap. to estabype , cost a

man chair

ement 4th Iss

ONTROL METHODS

ontractor olient Mana

ment System

P. Con

esign solutibenefits to

aint system

cialist to beblish the mand area

r

sue F

or age -ms

OGEA

ntractor

ion the

Cdest

ms Sbesyotapby

e most

T

T

Feb.23rd

OTHER SPGUIDANCE

g. ReferenACTIONS &

TBC

Client and Pevelop in latages.

pecialist sue approachystems to ither constrnd design.rocedures y team.

ractel Ltd .

o be consu

rd 201PECIALISTE & COMMnces & DATES

Project Teaater design

ubcontracthed on all integrate wruction act. Safety to be revie

.

ulted

3 T

MENTS

am to n

tors to roofing

with ivities

ewed

ProjeHAZASIGNRISK

TeamOther

3.2 SLABCONCONAREA

SAFE

3.3. ATRISTEE

CONACCEMAIN

3.3.1 CLAD

SERVACCEMAIN

ect & No:ARDS and

NIFICANT KS

m Sign -off rs

B – STRUCTIOCRETE FLAS

E WAH

UM POD EL OPTION

STRUCTIOESS AND

NTENANCE

ATRIUM DDING

VICES ESS AND

NTENANCE

:-:- Sd BU

AC

status CP

ON LAT

Comeduat

N

ON

E

POD

E


Client SP.M E

oncrete rooembrane .

uring constrall times

DesUniversFORM, MA

LOCATION


of and wate. Edge protruction to b


University

erproof tection be present

r CDM ampus


y ArchCDM

t

All recroofing

X

Optio


itect SM-C S

cognised g methods

X

ons Ma

REDU (DuriSafe s

cott Browcott Brow

.

Free structtowarprefaunits,assemTranssite- SRoadOff loon sitLiftingcrane.

DesigLocatfans aFuturMEW(confwalkwSpec

atrix -


wnrigg wnrigg

standing ture pointsrds brication o, and site mbly sportation tShip and

d oad , Storate g into placees, sequen

gn- holes, stions of lighand terminre access a

WPS from flined workiways . cialist Desig

Hazard


Struct. EnLandscap

Edg

s

of

to

ge

e by nce

Redamoat hsitu worhighheaope

services, ehts, ventila

nals, Smokat high leveloor or via ng spaces

gn, long de


ng SWpe

ge protectio

duces the ount of woreight with constructik but need

hly managevy lifting rations .

ends, finishation extracke detectorel access rou

s) or acces

elivery item

fication age :- C

RP by :-

>

WH (Str)

on Edcoup

rking in on

d for ed

h ct rs

utes s

m

ClamaMEfre

and SigC

ServCos

dge protectncrete stand para

adding maaintenanceEWP accesequent



tion

apet Perprot

aterials to re access oss will nee

nt Risk Mvision & D


WSant EC

rmanent Edtection

equire minr provision

ed to be mo

ManageDate: 4

ON ed gn eg esign t

CMCCm

P (Ser) Harris

dge

Deagante

nimum ns for ore

Deagante

ement 4th Iss

ONTROL METHODS


ment System

P. Con

etails to begreed on cond buildabirms

etails to begreed on cond buildabirms

sue F

or age -ms

OGEA

ntractor

Pdeaare

e ost ility

Tmasthbco

e ost ility

Tclroearara

Feb.23rd

OTHER SPGUIDANCE

g. ReferenACTIONS &

TBC

arapet andetails to bellow edge plso permit eplacemen

eam to conmanufacturessembly ophe wider situildability aonsideratio

eam to caradding an

outes. Walkasy accessaisable panather than


d slab edgee analysedprotection access to

nt and remo

nsider off-se and site pportunitiete access, and cost ons.

refully cond serviceskways to hs to servicenels in flooin soffites.

3 T

MENTS

e to but plant ovals.

site

es in

sider

have es by

or

ProjeHAZASIGNRISK

TeamOther

3.7 RPOIN

4.0 FAÇACONAND MAIN

MAININTEEXTE

GLASMENT

4.1 HIGHCONMAINACCE

ect & No:ARDS and

NIFICANT KS

m Sign -off rs

ROOF ACCNTS

ADE STRUCTIO

NTENANCE

NTENANCERNAL AND

ERNAL

SS REPLAT STRATE

H LEVEL STRUCTIO

NTENANCEESS

:-:- Sd BU

AC

status CP

CESS

ON

E

E D

ACE-EGY

ChtopDeGlanMaLowin

ON & E

Celar


Client SP.M E

herry pickep of façadeesign ulam timbe

nd curtain wanufacture

ong lengthsndows for

eilings , sofrge spaces

DesUniversFORM, MA

LOCATION


er access ree

er fins andwalling behe/Material s, economyventilation

ffites, etc is


University

equired to

structure hind

y, opening

n high or

r CDM ampus


y ArchCDM

Not poeliminafor accplant arainwapresen

Accesand innecessconstrcleaninrepair

Minimmainteaccess

Optio


itect SM-C S

ossible to ate the neeces as roofand ater outletsnt.

s externallternally sary for ruction ng and

ize need foenance s

ons Ma

REDU (DuriSafe s

cott Browcott Brow

ed f

s

10-38

ly

Intern

or Can amateeg. Mpaintecoate

atrix -


wnrigg wnrigg

8 degrees

nal access

alternative rial be use

Metal sheeted or powded.

Hazard


Struct. EnLandscap

38-7frequ

Exterequ

Mas

ed t pre der


ng SWpe

75 degrees-luency acces

ernal accesuired

st Climber

fication age :- C

RP by :-

>

WH (Str)

low ss

75Vefre

ss Roreqex

and SigC

ServCos

-90 degreeery low equency

oped Accesquired ternally



es.

ss Induaccassstanope

Temattaor r

Temhanor phan

nt Risk Mvision & D


WSant EC

ustrial ropeess trade ociation ndards of eratives req

mporary craached to eaoof tracks

mporary ndrails requpermanent ndrails

ManageDate: 4

ON ed gn eg esign t

CMCCm

P (Ser) Harris

RoopprfaingExanha

ed

quired

adles aves

Opla

uired

ement 4th Iss

ONTROL METHODS


ment System

P. Con

oof Accesspening to brotected frolls and raingress. xtendable snd balustraatch.

ne man woatforms

sue F

or age -ms

OGEA

ntractor

s be om n

stairs ades to

Mst

R

ork

CACfacrMCacWInMreGORoCCBw

DwbmPaex

Feb.23rd

OTHER SPGUIDANCE

g. ReferenACTIONS &

TBC

Main plant atair core.

Ref. BS856

ConstructionAvoidance oCrane, telehaçade climbradles

MaintenancCradle, MEWccess?

Window clenfrequent?

Mastic replaepairs?

Glass, paneOther issueRoof accessr cradle ac

Capital v LifCosts

S 8560 www.tractel

DESIGN TEwith contracuildability a

maintainabiossibilitiesnd lifting inxplored.


access from

0 Table 2

n of scaffoldhandler, Mber, tempo

ce WP, Rope

aning ?

acement, m

el replacems s above foccess. fecycle/ope

l.com

EAM to rector on cosand lity.

s of prefabrnto position

3 T

MENTS

m east

ing EWP,

orary

d

minor

ment

r roped

erating

eview st,

rication n to be

ProjeHAZASIGNRISK

TeamOther

4.4 GLAZCLADOPTI

INST

SAFE

5.0 ROOINSTAND REPLSTRA

SAFE

5.1 OPTIROOINSTAND REPLSTRA

SAFE

ect & No:ARDS and

NIFICANT KS

m Sign -off rs

ZING DDING ON 1

ALLATION

E WAH

F PLANT ALLATION

LACEMENATEGY

E WAH

ON 2 F PLANT ALLATION

LACEMENATEGY

E WAH

:-:- Sd BU

AC

status CP

N

DeendeSpaeTeslains

N

NT

RoaneleHaacinsunstr

N

NT


Client SP.M E

etails of winnvelope claeveloped. peed of conesthetics anemporary pab edges bstallation.

oof Plant- Rnd service aevations. ard Landscccommodatstall, removnless alternrategy inten

DesUniversFORM, MA

LOCATION


ndows, glaadding to b

nstruction vnd cost. protection rbefore and

Road layouaccess to a

caping to te heavy vve , replacnative tempnded.


University

azing and e

v safety ,

required toduring

ut, fire pathall

vehicles to ce plant porary

r CDM ampus


y ArchCDM

o

Risks by temprotec

h

Roof prequireand co

Optio


itect SM-C S

eliminatedmporary edction.

plant is ed for desiost reasons

ons Ma

REDU (DuriSafe s

cott Browcott Brow

d ge

.

.

gn s

The PInstalReplastrateentaillouvreand wslabslift or from hardsStabibe en

atrix -


wnrigg wnrigg

Plant llation and acement egy could l removables, if requiwaterproof

s, Mobile crscissors liperimeter

standing/ rolity of cran

nsured

Hazard


Struct. EnLandscap

e red fed rane ft

oad. ne to


ng SWpe

fication age :- C

RP by :-

>

WH (Str)

Spdenesc

and SigC

ServCos

pecial paratails cessary wissors lift.



pet

with

Thiswatencplanthe Plusplanenhreplnot roofwatissu

nt Risk Mvision & D


WSant EC

s will allowertight

closure datnt will not bcritical pats any futurnt hancementlacements entail majof removalser ingress

ues

ManageDate: 4

ON ed gn eg esign t

CMCCm

P (Ser) Harris

Rogaanfincle

FrHS

w early

te and be on th. re

ts will or

s and

ement 4th Iss

ONTROL METHODS


ment System

P. Con

oped acceasket instand externalnishing andeaning.

rom 6-60 TSS

sue F

or age -ms

OGEA

ntractor

ss for llation l d

Tmfr

Tons

DthblifPeloSresupCeswWred

DLoFMCoSRimGRre

Feb.23rd

OTHER SPGUIDANCE

g. ReferenACTIONS &

TBC

eam to devmethodolog

om outside

DESIGN TEhe edge deuilding opefting in planreferable elevation an

ouvres. oft Spots i

emove andupplementlant.

Creates watspecially d

works. Waterproofiesolved. Inifficult task

DESIGN TEocations lat roof?

ModularizatCost, spaceut issues.pecialist D

Roof and famplicationsGutters, rooRemovable eplacemen


velop a gy of cladde or inside

EAM to resetails or othening issuent externally vnd remova

n the roof d install newtary, or rep

ter ingressduring insta

ing issues nfrequent bk

EAM

tion v site be, lifting in a

Design açade s of access

panels fornt

3 T

MENTS

ing .

solve her es for

via the ble

to w or

place

s points allation

to be but

build and

r









2.2.1 ASBESTOS REPORT / REGISTER FOR THE CAMPUS BUT ESPECIALLY MILLAIS BUILDING

SSU - Millais Building - Asbestos Cladding

As mentioned, last week, I learnt from SSU that the existing external wall cladding panels to the Millais Building (the panels below the windows) contain a form of asbestos.

Clearly, this hazard will have to be highlighted in the CDM documentation and on our design drawings.

It is also likely that SSU will wish to have the panels removed and safely disposed of either prior to or as part of the New Academic Teaching Building project.

Client has provide d Register and Survey with annotated drawings. SB to coordinate with design proposals. In Stage D documentation

Can panels be left in place and highlighted on drawings and on site where modified, or to be retained?

Client- ssu Design team Contractor to consider the implications of such a strategy at tender stage

2.2.1A EXISTING BUILDING ASBESTOS

ASBESTOS CONTAINING MATERIALS (ACM’S) MAY BE PRESENT

Identify where asbestos may be present and see if it can be retained safely or must be removed. A drawn survey with marked up drawings would be better than a narrative report, unless asbestos is minimal.

Signage to be used on site if ACM’s present

Contractor to assume asbestos is present unless informed otherwise.

2.2.1

Refurbishment asbestos survey provided. This will be essential for construction phase plan .Report may state that no Asbestos was present but needs clarification. CLIENT

Timing of works? Enabling or post watertight?

Asbestos in Flooring in Millais to be confirmed?









2.2.1B ASBESTOS SURVEY OF MILLAIS BUILDING

They would appear to be simply window mullions – the word mullion is very much used as a description on the drawing, there is an Aerofil joint (soft joint) at the top of the mullion and denso tape is specified around the dowel bars at the top joint to allow vertical movement. Their removal should therefore not be detrimental to the structure but I assume they will only be removed in locations where access is required which is wider than the existing window units.

The principle structural columns are shown on the archive drawings as continuously reinforced insitu concrete (rather than PC) elements .(SWH)

1. Asbestos surveys of alllevels of the Millaisbuilding are nowavailable and to beprovided in a tenderpackage.

2. These will beincorporated into designdrawings showinglocations at whichconstructioninterventions will benecessary.

3. Client may wish to retainand manage existingasbestos, or alternativelyremove this as part of theproject, or a partialremoval.

4. These drawings will allowthe financial andconstructionalimplications of itsremoval to beconsidered.

5. Detailed sections of thecladding will be requiredto establish the locationof the asbestos and themethods needed toaccess and remove itwithin an existing andoperational academicbuilding. See 2.2.1Cbelow









2.2.1C ASBESTOS REMOVAL AND OTHER INTRUSIVE WORKS TO MILLAIS BUILDING

1. Millais Elevational Works2. All Levels to be assessed









2.2.1D ASBESTOS SURVEY OF MILLAIS BUILDING

1. “Asbestos washers orshims to be used toobtain correct mullionlevel”

2. Strategy for removal tobe considered by projectteam.

3. Do we as a team havean understanding of whatthis entails with respectto our works? Is this aconcrete structuralmullion or the windowmullion?

4. Surely we will not betaking these shims out ofexisting/retainedstructure or windows thatwe are not touching? Isthe asbestos notencapsulated somehow?

5. We seem to need abetter intrusive survey toascertain the exactconfiguration andcondition of the ACM.

6. Then we can devise acourse of action.

7. Mark, Is a RefurbishmentAsbestos survey beingcommissioned by theteam or client during thesummer vacation toclarify the issue?

8. Team- Will this needexternal or internalaccess or both?









2.3.3 LEVEL 01

OVERVIEW ISSUES 1. Integration with existing

deck and flat roof withfragile rooflights

2. Existing Services3. Adjacent foundations and

structural interfaces4. Construction access into

Atrium zone?5. Levels, sloping site6. Works inside , on-top of

and to elevation of Millaisduring occupation?

7. Extent of decant ofMillais during con-struction of links etc.

8. Construction phase firestrategy.

9. Diversion of Millaisaccess and escaperoutes

10. Asbestos Survey ofMillais- How muchimpact on design?Temporary protection ofMillais elevation

11. Roof works to Millaiswith waterproofing andplant implications

12. Temporary structuralworks

13. Access doors intoAtrium for cleaningMEWPS and largepieces of equipment fordisplays, exhibitions, etc.easily removable panelsto front elevation









2.3.7 ROOF LEVEL (TO BE UPDATED)

CDM ISSUES

2.3.7

1. Preferable to have a950mm min. highparapet around roofperimeter due to linearnature of plant space.However may beimpossible due to plantarea required.

2. Plant and Atrium Roofaccess to be consideredin detail

3. Cleaning track forsuspended chair orroped access to NorthElevation of NATC.Alternatively a MEWPmay be the clientpreferred option.

4. Suspended accessavoids need for MEWP’sto use car park to NorthElevation

5. Roof access stairs/ladders to be suitable forcarrying tools, filters,replacement parts etc.for roof plant

Anchor points & line for roped access to north , west and east elevations and fall prevention onto ETFE/ fragile atrium roof

Roof Access points. East access stair and west escape ladder

Plant Layout & access routes to be drawn









2.4 3-D VIEW

CDM ISSUES:-

1. High level access issuesfor cleaning andmaintaining

2. Maintenance access toelevations

3. Maintenance to pod4. Balcony Fronts5. Atrium lighting access6. Walkway at high level in

atrium for roof ventaccess and maintenanceinternally

7. Fire stairs available forconstruction stageescape and existingMillais stairs for existingpopulation evacuation.

8. Prefabrication of stairflights and carnage intolocation. Temporary orpermanent handrailprotection to be included









4.1 HIGH LEVEL CONSTRUCTION & MAINTENANCE ACCESS

Ceilings , soffites, etc in high or large spaces

Minimize need for maintenance access

Can alternative material be used eg. Metal sheet pre painted or powder coated.

Temporary handrails required or permanent handrails installed early and protected

DESIGN TEAM to review with contractor on cost, buildability and maintainability. Possibilities of prefabrication and lifting into position to be explored.

4.2 FAÇADE CONSTRUCTION

SAFE WAH

BUILDABILITY & Maintainability Long term term maintenance issues such as cost, access , frequency, etc. to be considered. Internal assembly process or external crane access. Type and durability of finish to be considered especially at low level adjacent to public walkways

Edge protection required at roof level during construction.

Scaffolding or MEWP access zones to be shown on site set-up plans to help analyse impact on other construction processes. Temporary cradles could also be used.

PROJECT TEAM Scaffolding may be avoidable if all construction can be carried out from inside or via telehandlers or MEWPS, or cranes from outside. Integration of roof and cladding installations to be considered. Roped access or mast climbers for gaskets and mastics etc Early discussions with Suppliers /manufacturers required.

4.3 GLAZING CLADDING OPTION 1

INSTALLATION

SAFE WAH

Details of windows, glazing and envelope cladding to be developed. Speed of construction v safety , aesthetics and cost. Temporary protection required to slab edges before and during installation.

Risks eliminated by temporary edge protection.

Roped access for gasket installation and external finishing and cleaning.

Team to develop a methodology of cladding from outside or inside.









4.4 CLADDING PROPOSALS

1. Cladding constructionmethods – use of staticor mobile cranes orinternal telehandlers

2. Speed of constructiondue to tight programme

3. Roped access forgasketry and assistanceduring cladding processbut also for futuremaintenance.

4. Sloping site makesmobile crane accessmore difficult

5. Future replacementstrategy cannot usetelehandlers due toraised access floorsinternally. Mobile cranesessential unlikely that acradle/BMU system willbe provided on roof.

6. Natural ventilationlouvres ( if any)to bemaintainable from inside

identify the significant risks riba - iirsm 2... · riba. designer cdm analysis and options matrix...

Documents