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APC PRE QUAL > Pre Qual Case Study > Flashcards

Pre Qual Case Study Flashcards

1
Q

What is shell & core

A

Concrete shell
Metal frame
Weather proofed
Communal areas (usually completed)
Without services
With cores built (stairs)

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2
Q

What is CAT A fit out

A

Fully functional but empty space
Raised access floors
Suspended ceilings
AC
Lights
Basic fire detection & protection in place
Basic installations M&E in place
No fixtures or fittings

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3
Q

What is CAT B

A

Fully fitted out
Partitioning installed
Joinery
Door & floor finishes
Meeting rooms
IT/ AV fitted out

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4
Q

What contract is used

A

JCT standard building contract 2016 with amendments

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5
Q

How was the contract procured

A

2 stage tender process, traditional procurement

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6
Q

Why use a 2 stage tender process

A

Involve contractors early - Contractor design portion included - helps with build ability
More collaboration

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7
Q

What happens in first stage of 2 stage tender

A

Competitive tender of package
Tender interviews
Review of programme
Overheads, profit & prelims
Ends with appointment of preferred contractor under PCSA

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8
Q

Second stage tender of 2 stage

A

Pre construction service agreement
Negotiation between client and contractor on price
Firm up programme
Agree contract requirements
Ends with agreement of lump sum contract sum
Novation of consultants

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9
Q

Why traditional

A

Blp wanted to maintain control of design
Cost certainty

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10
Q

What is novation?

A

Legal term- replacement of party X in an agreement with a new party, with consent of all parties.
Eg on Bloomberg- Novation of SAS (ceilings) to ISG

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11
Q

What are the RIBA stages

A

Stage 0: Strategic Definition.
Stage 1: Preparation and Briefing.
Stage 2: Concept Design.
Stage 3: Spatial Coordination.
Stage 4: Technical Design.
Stage 5: Manufacturing and Construction.
Stage 6: Handover.
Stage 7: Use.

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12
Q

Key activities in riba stage 0

A

Stage 0 is about the discussions you need to have and the calculations you need to make before you are ready to commit to a project.

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13
Q

Key activities in riba stage 1

A

Preparation & briefing
Architect is onboarded

Project Outcomes
Sustainability Outcomes
Quality Aspirations
Spatial Requirements
Undertake feasibility studies & agree overall budget

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14
Q

Key activities Tina stage 2

A

Concept design
Design & build contracts when the contractor would be onboarded / start tender process
Consultants are onboarded

design reviews happen – you and the design team work together, exploring ideas and analysing options, to get to a concept that fulfils both your wants and needs. It starts with rough ideas and evolves towards a workable design

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15
Q

Key activities RIBA stage 3

A

Spatial coordination
Structural engineer onboarded
Building regulations checklist
Design shouldn’t change much between stage 3-4

sustainability strategy, and all consultant recommendations should be incorporated into the design

Normally prepare planning documents for submitting planning applications

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16
Q

Key activities RIBA stage 4

A

Technical design
Usually when contractor is onboarded in traditional (no CDP)
Building regulations checklist
Design finalised ready for construction

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17
Q

Key activities RIBA stage 5

A

Construction

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18
Q

Key activities in stage 6

A

Handover
O&Ms handed over

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19
Q

What amendments are in your contract

A

Rectification period is 12 months
IDF room sectional completion is 6 weeks prior to PC

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20
Q

Did you select the contract?

A

No I personally didn’t, this was preselected prior to arcadis involvement

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21
Q

Do you think this contract form was suitable

A

Yes as design control remained with the client, early build ability input from the contractor

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22
Q

How would design risk vary depending in different forms of contract

A

D&B design risk would sit with the contractor

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23
Q

Could you use other forms of contract?

A

Yes- we could have used JCT D&B or NEC

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24
Q

Why didn’t you use NEC

A

NEC is typically used for public sector but could have been adapted for use on this project.
The client was more familiar with JCT contracts and therefore that’s why JCT was used

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25
Q

What were the contract Amendments

A

Rectification period is 12months instead of 6.
Sectional completion of IDF rooms, 6 weeks prior to handover

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26
Q

Why did you go to tender in stage 2 for traditional project

A

Wanted early build ability from contractor
Staircase CDP

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27
Q

Why 2 stage?

A

Early contractor involvement
Increased collaboration with consultants
Build ability to help reduce design risk

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28
Q

What is CDP

A

Contractor design portion
Agreement for contractor design specific parts of work
Staircase for Bloomberg

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29
Q

Why use traditional if you want CDP?

A

Client wanted to maintain control on the design but wanted the build ability input from the contractor to gain expertise
Risk was around the structural impact of the stair and client wanted this risk to be passed onto contractor

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30
Q

Stair issues

A

Understanding necessity to back prop to L2
Where to cut the slab
How to reinforce the structural load
Need for hoarding and how it would impact the critical path when completing floors

31
Q

Did you use PCSA

A

Yes

32
Q

What does PCSA stand for

A

Pre construction service agreement

33
Q

Typical activities under PCSA

A

Overheads and profit agreed
Programme agreed
Build ability input
Agree on nominated subcontractors
Agree any novation

34
Q

Did you issue an early orders under PCSA

A

Yes, early orders for M&E - EPIC valves, more sustainable raised access flooring

35
Q

Sustainable construction in the project

A

Raised access flooring is recycled
EPIC valves within fan coil units- give better control of temperature

36
Q

With the late addition of the stair did you have to change any contracts

A

Yes- I advised the client that the scope of the consultants needed to be enhanced for the stair.

37
Q

Did you draft change in contracts ?

A

No I advised the client and their legal team drafted change in contract for the client to issue

38
Q

Why did you undertake an options appraisal

A

To further detail each option, highlight the cost impact and the programme impact

39
Q

How did you review programme impact of the stair

A

Looked at benchmarked dates for similar projects
Reviewed the impact on the critical path
- fire hoarding
- impact on the live floors
- OOH work

40
Q

How were the external walls built

A

Stone facade
Bronze
Curtain walling

41
Q

What surveys did you undertake

A

Instructed asbestos survey despite the base build being complete in 2017, there may be an asbestos risk
Condition survey

42
Q

What is an F10

A

Notification of a construction project sent to health & safety executive

43
Q

Does every project need an f10?

A

No, only needs one if longer than 30 days and less than 20workers
Or
Exceeds 500 person days

Construction regulations 2015

44
Q

what is status A

A

approved with no comments

45
Q

what is status B

A

approved with comments

46
Q

what is status C

A

rejected & to be revised with the comments issued by design approver

47
Q

CDP design approval

A

schedule 1 design submission procedure

48
Q

how is the slab cut

A

track saw cuts through the concrete
oxyacertaline cuts through the steel ( a really hot blow torch)
weight is held from the top and lifted out through sections using an A frame
around the edge is broken back to 1m to expose the rebar
additional rebar is added around the edge to strength the slab and then refilled to 1m for hole

49
Q

what is the bloomberg fire strategy

A

Phased evacuation- once smoke is found that floor and two floors above evacuate and then 2 floors down from L8 at a time.

50
Q

whats passive fire protection

A

contain fire within a space- use of intumescent paint (once chipped is redundant) or fire rated plaster board (pink)

51
Q

intumescent paint

A

it expands when hot

52
Q

whats active fire protection

A

detecting & stopping- sprinklers

53
Q

why have a gas suppresion system?

A

when you cant use water sprinklers eg comms room

54
Q

which building regulations document deal with fire

A

approved document B

55
Q

what order do you cut the slab

A

top down. crash matts on floor below

56
Q

how much is the ergonom advance payment bond

A

30%, £1.8m

57
Q

what does privacy of contract mean?

A

a common law principle which provides that a contract cannot confer rights or impose obligations upon anyone who is not a party to that contract.

58
Q

what is the arcadis team structure

A

senior director
Senior PM
me- assistant PM

59
Q

what were your typical responsibilities

A

ran the day to day PMing of the overall works alongside the senior PM, once the contract was signed undertook the contract adminisatrors role with sign off from the director

60
Q

why take on a project at shell and core instead of cat A

A
  • full ownership of design, can be completely tailored to my clients desires.
  • less likely to have issues with the M&E eg on BDO there are issues with the riser routes
61
Q

why undertake 2 stage

A
  • market preference currently
  • CDP- needed early contractor input
  • PCSA to get contractor on board to help with wider buildability
62
Q

what were the funding gateways

A

at the end of each design stage
if there was a design change that costed over $200,000 dollars it had to go through procurement committee for sign off- had CFO team on this board

63
Q

do you think the staircase was a good idea?

A

yes- from a design perspective it enhanced opulence of the south building - something that is important to the client
however, there was an opportunity cost of the staircase that the money could have been used on other initiatives within the building

64
Q

how was the stair constructed

A

construction of the stair hasnt started yet but, it will be done out of hours to reduce disruption to the staff in the building

65
Q

risks with out of hours working

A

risk of fatigue from H&S perspective and also from quality perspective.
also more expensive to have OOH works

66
Q

what is the fire strategy

A

once smoke is detected, the floor and the floor above and below are evacuated, then two floors at a time from the top of the building

67
Q

what are the extract systems

A

there are smoke extracts on both sides of the cores, this takes the smoke out through the risers and out through the roof

68
Q

other options for fire strategy?

A

fire curtains around the staircase, these did not align with the design intent

69
Q

how did you ensure the hoarding around the stair was fire rated

A

60min fire rating.
slab to slab hoarding

70
Q

is the smoke extract system/hoarding passive or active fire protection

A

passive

71
Q

what is active fire protection

A

detects extinguish or aid evacuation

72
Q

examples of passive

A

intumbescent paint
plasterboard

73
Q

why was a mock up needed for the staircase

A

review the complexity of the design.
bronze fixing/ sheets
puckering of leather on balustrade

74
Q

how could you value engineer the mock up

A

could use computer modeling
factory visit
benchmarking
it was CDP so is the contractors risk
use other materials/ off cuts

APC PRE QUAL (10 decks)

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