1. East Hall renovation East Hall Renovation : Civil Engineering works
Stewart Mcilwraith – Charly Gasnier (SMB-SE)
B /12/2017
SMB-SE

2. Initial baseline : Scope & budget Status following PB #1
Contents
Initial baseline : Scope & budget
Status following PB #1
Subsidised options: Scope & Costs
Budget
Skylight
Planning
Procurement Status
Safety
Façade composition
Conclusions
B /12/2017
SMB-SE

3. 1. Initial Baseline : Scope & Budget2
Work zone 1:
260m2 of glazing
4600m2 of suspended ceiling
Roof waterproofing verification
Work zone 2:
1250m2 of glazing
1200m2 of Eternit façade cladding
B /12/2017
SMB-SE

4. 1. Initial Baseline : Scope & Budget
Glazing to replace 260m2
Ceiling panels to replace 4600m2
Roof fixations & gutter integrity checks
Suspended scaffolding
(~5000 m2)
B /12/2017
SMB-SE

5. 1. Initial Baseline : Scope & Budget
Fibre-cement cladding to be replaced (1200 m2)
Glazing to replace(1250 m2)
Note: Possibility to reduce mid-level glazing to be investigated
B /12/2017
SMB-SE

6. 1. Initial Baseline : Scope & Budget
Total CE budget following SMB IPP study (presented in PB#1 and C&S review 08/12/16):
2.48 MCHF (+/- 30%)
Available budget (update 06/04/17): 2.24 MCHF
(-5% to centralised contingency & -5% due to CVI)
No reduction in scope associated with budget reduction
B /12/2017
SMB-SE

7. 2.1 Status following PB#1 – Discussion topics
Conflict with CLOUD run (Winter 2017): Suspended scaffolding installation order inversed on North-east façade to avoid conflict.
Removal of services from facades prior to CE works:
Ventilation units on NE façade to be removed in 12/2017
All other items removed during 2017 campaign
Safety Coordinator: EN-ACE (M. Bonnet ,EROS team) collaborating since 06/17 and will be responsible for on-site safety coordination throughout the works. O. Prouteau contributing asbestos expertise.
Synergy with B156 envelope:
SMB preliminary studies (SMB-SE-CEB) on-going
Procurement for external architects underway
Visual consistency with B157 renovation prioritised
B /12/2017
SMB-SE

8. 2.2 Status following PB#1 - Roof
Baseline prior to PB#1: Replace ceiling / repair roof
Three issues with existing roof / ceiling:
1) Asbestos – health risk – In Baseline
2) High energy loss (uninsulated) – (CHF!!!) – In Baseline
3) Leaks
Baseline : punctual interventions (Gutter replacement & fixation / joint checks)
Following CE design: not technically / financially advisable to continue to punctually repair roof leaks given age of roof. Leaks reappear and damage new false ceiling.
Solution proposed : Replace roof with insulated sandwich panels instead of replacing false ceiling / repairing roof.
Proposal confirmed with project team 07/17
B /12/2017
SMB-SE

9. 2.2 Status following PB#1 - Roof
1) Remove / replace ceiling + repair roof
2) Remove ceiling / roof + replace roof
B /12/2017
SMB-SE

10. 3. Subsidised options: Scope & Costs
The East Hall renovation project is eligible for a subsidy from the Office Cantonal de l’ENergie (OCEN) if Uenvelope<0.20 W/(m2.K).
- Concrete walls, durasol panels, polycarbonate panels and windows are outside of this criteria.
- Sandwich panels are within the criteria
Facade materials
Gable insulation
Lower façade wall insulation
B /12/2017
SMB-SE

11. 3.1 Façade Materials B.157 - 05/12/2017 SMB-SE
Technical description of the solution:
Replacement of central polycarbonate panels with sandwich panels (542m2)
Reduction of light in building
Financial impact:
Not included in IT. Unit prices for material exist in IT. Modification of quantities.
Estimation based on contractor’s unit prices: -49k CHF
Possible subsidy from OCEN: -38k CHF
Estimated return in terms of energy consumption: -6k CHF / y (costs 2016/17)
Status: Approved by project team
B /12/2017
SMB-SE

12. 3.2 Gables
Technical description of the solution:
Insulation of exposed gable walls Included in IT (with possibility to retract)
660m2 of concrete / durisol walls insulated externally by sandwich panels
Financial impact:
Contractor price: +80k CHF
Possible subsidy from OCEN: -46k CHF
Return in terms of energy consumption: -8k CHF / y (costs 2016/17)
Status: Retractable option in contractor mandate
Sandwich Panels
Sandwich Panels
B /12/2017
SMB-SE

13. 3.3 Lower Façade Walls +950 m2 (total 2 facades) B.157 - 05/12/2017
Technical description of the solution:
Insulation of lower longitudinal walls, 950m2 of concrete / durisol walls insulated externally by sandwich panels.
Conflict possible with external services (e.g. gas point)
Financial impact:
Not included in IT. Unit prices for material exist in IT. Modification of quantities.
Estimation based on contractor’s unit prices: +92k CHF
Possible subsidy from OCEN – 66.5k CHF
Estimated return in terms of energy consumption: -12k CHF / y (costs 2016/17)
Status: Proposition
Sandwich panels
Sandwich panels
+950 m2 (total 2 facades)
B /12/2017
SMB-SE

14. 3.4 Subsidies OCEN B.157 - 05/12/2017 SMB-SE
Dossier currently under approval with OCEN (Decision expected 2017)
Subsidy received once works are completed (2019)
Possible to await confirmation of subsidies prior to engaging extra work from Contractor
Item
Cost variation contractor
Possible subsidy OCEN
Estimated annual energy savings (2016 prices)
Baseline
Roof
-392
-250
Main facades (baseline)
-82
Total baseline
-474
Options
Change of façade materials
-49 (estimate)
-38 -6
Gables 80
-46 -8
Lower walls
92 (estimate)
-66
-12
Total Options
123
-150
-26
B /12/2017
SMB-SE

15. 4. Budget (k CHF) Baseline Options B.157 - 05/12/2017 SMB-SE Article
IPP
Price
OCEN subsidies
Net total
Baseline
Architect
Yes
110
Installations
931
Façade replacement
984
-82
902
Asbestos removal façades
140
Asbestos removal ceiling No
420
Replacement ceiling + minor works
Replacement roof + minor works
831
-392
439
Total baseline
2 480
3 336
-474
2 862
Options
Façade materials* (approved)
-49
-38
-87
Gables (in contractor mandate) 80
-46 34
Lower walls* (proposition) 92
-66 26
Total with options
2480
3459
-624
2835
Energy savings
-15/y*
-235/y*
-250/y
-6/y*
-8/y*
-12/y*
-276/y
* Estimated based on contractor’s unit prices / CERN energy calculations (rates 2016/2017)
B /12/2017
SMB-SE

16. 5. Skylight removal
B /12/2017
SMB-SE

17. 5. Skylight B.157 - 05/12/2017 SMB-SE Advantage Disadvantage
Reduction of heated volume (3.5% of volume at high point of building)
Loss of architectural identity
Reduction of thermal bridges (windows & horizontal / vertical joints between panels / windows)
Reduction of overall surface of natural light
Optimisation of effectiveness of natural light (horizontal skydomes replacing vertical windows)
Reduction of envelope material liaisons / risks associated with water ingress
Reduction of maintenence needs
Improvement of smoke ventilation efficiency
Variant
Cost
Subsidies
Net total
Energy savings*
Baseline
3 336
-474
2 862
-250/y
Options
123*
-150
-27
-26/y
Skylight
-75*
-75
- (unknown)
Total
3 384
-624
2 760
> -276/y
B /12/2017
SMB-SE

18. 6. Planning
Extremely tight planning from December 2016 until now respected with one exception – procurement of suspended scaffolding contractor
Result: delay of installation of suspended scaffolding
Re-phasing of main contract tasks so suspended scaffolding is not on critical path
Modification to take into account for co-activity with exploitation
B /12/2017
SMB-SE

19. 6.1 Planning - Impact on EA activities
Suspended scaffolding test as of January 15th
Test area
Shielded Area
Area to be condemned
Shielded Area
Overhead crane to be used as protection
B /12/2017
SMB-SE

20. 6.1 Planning - Impact on EA activities
T09, T10, CHARM and IRRAD: Mar-18 to Nov-18
T09: very sensitive users (BL4S) in Sep-18
CLOUD users: Sep-18 to Dec-18
Magnet patrol: 05/02/18
Already installed
Prioritised before end 03/18
Remaining zones
CLOUD users
09 to 12/18
T09-T10 users
T09-T10 users
03 to 11/18
Shielded Area
Shielded Area
CHARM-IRRAD users
03 to 11/18
* If works are delayed, local protections can be installed above CHARM-IRRAD
B /12/2017
SMB-SE

21. 6.2 Planning - Impact on surrounds
 North-East side of the building : Jan-18 to July-18
 Sout-West side of the building : July-18 to February-19
Site installations
21 parking places inaccessible during 7 months
Envelope renovation works on NE side (façade then roof)
Envelope renovation works on SO side (roof then façade)
14 parking places inaccessible during 7 months
Site installations
B /12/2017
SMB-SE

22. 7. Procurement Status Asbestos removal and shell renovation
Technical and commercial analysis completed
Letter of intent sent. Execution studies and initial orders underway.
Finance Committee 13/12
VIC’s and minor activities on site by January 8th
Contractor full mobilisation on site by January 15th
Suspended scaffolding
Final technical documentation from lowest bidder (December 8th).
HSE approval required by December 22nd.
Test installation to start by January 15th
B /12/2017
SMB-SE

23. 7. Procurement Status - Risks
There exists a risk that the documentation submitted by the lowest bidder will be unacceptable.
No other response to DO was within the budget attributed to this task
The order of contingency for this situation is proposed as follows:
1) Principal contractor to subcontract scaffolder and include in principal work package
If not technically acceptable / within budget
2) Principal contractor proposes methodology to remove false ceiling / roof from above with alternative safety / waterproofing measures (external bridge, safety nets, harnesses and safety lines…)
3) Roof / ceiling replacement removed from initial CE work to be carried out during 2018
B /12/2017
SMB-SE

24. 8. Safety
All activities will be subject to a VIC before works can start.
Suspended scaffolding
Zone of influence of installation & removal will be enclosed by 2m-high barriers.
Façade renovation
Welded Polyane will be installed to protect interior of the building from severe weather
Roof renovation
Welded Polyane will be installed on suspended scaffolding to protect interior of the building from severe weather
B /12/2017
SMB-SE

25. 8. Safety - Asbestos
Users will never be in contact with asbestos containing materials during CE works and do not require protective equipment
Zone underneath false ceiling will be confined as an airtight space. Workers inside this space will wear protective equipment
Asbestos containing materials will be placed into a decontamination SAS and into protective bags
Closed protective bags will leave the SAS and be transported directly to the
exterior of the building via personnel doors / open windows
Bags will be stored in dedicated area
within closed worksite
Bags will be checked by RP prior to
transport to appropriate waste treatment
facility
B /12/2017
SMB-SE

26. 9. Façade composition
Approved by CERN visual identity / colour chart (F. Landua)
White sandwich panels : RAL 9010 (TBC)
Grey sandwich panels : RAL 9006 (standard CERN)
B /12/2017
SMB-SE

27. 10. Conclusions Outcomes from PB#1 have been integrated into project
Possibilities to increase scope in CERN’s interest (appearance, energy consumption, lifespan) with negligible extra cost or even reductions in cost
Possibility to await outcome of OCEN analysis to ensure informed decisions about such scope increases
CE project is over initial budget, but alternatives are available to reduce this overspend
CE project critical path is on track
Collaboration with exploitants is close and major milestones are planned around exploitation. Day-to-day co-activity to be managed on-site
Principal contractor is engaged and ready to begin in January
Suspended scaffolding contractor is not yet engaged and presents a project risk
All possible measures to ensure safe coactivity and project execution are being taken
It is possible to give this important experimental building an architectural identity within the CERN colour chart (almost) and the neighbouring architectural context… at no extra cost
B /12/2017
SMB-SE

28. Questions
B /12/2017
SMB-SE