Construction technology based on Written

Question 1

Can you talk me through how you identified and addressed the fireproofing requirements for the Battery Cycling and Battery Thermal rooms?

Answer 1

I recognised that specialist laboratory spaces often require enhanced fire protection beyond standard partitions. At RIBA Stage 2, I queried this with the design team to avoid underestimating costs. They confirmed that Durasteel was required, which I then incorporated into my estimate for both partitions and ceilings. This ensured the budget reflected realistic technical requirements at an early stage.

Question 2

How did you ensure your cost estimate for Durasteel partitions and ceilings was accurate, given that this is a specialist system?

Answer 2

I benchmarked against previous projects where Durasteel had been used and consulted supplier cost data. I also applied allowances for potential specialist installation and fixings, as these can carry a premium compared to standard fire-rated systems. This approach gave the client greater confidence in the robustness of the estimate.

Question 3

What considerations did you take into account when comparing typical fire-rated partitions with Durasteel?

Answer 3

The main considerations were:

Performance: Durasteel provides higher resistance to fire, blast, and impact.

Cost: significantly higher than standard partitions.

Programme: lead times and specialist labour could impact delivery.

Risk: failure to specify correctly could expose the project to compliance and safety issues.
I presented these differences to highlight the implications for both budget and risk.

Question 4

How did your engagement with the design team influence the cost advice you provided to the client?

Answer 4

Clarifying the specification early allowed me to provide a more accurate estimate and avoid later cost increases. It also demonstrated proactive risk management — by raising the question before Stage 3, I helped ensure the client could plan for the additional cost rather than being surprised later in the design.

Question 5

What risks or challenges could arise from specifying Durasteel in terms of cost, programme, or buildability, and how did you reflect this in your advice?

Answer 5

Risks included extended procurement lead times, limited specialist contractors, and potential programme delays if sequencing wasn’t coordinated. I reflected these in my cost advice by including an allowance for specialist installation and recommending early engagement with suppliers to secure accurate pricing and lead times.

Question 6

How did you assess the cost implications of extending the walkway with cantilevered support and suspended pocket parks?

Answer 6

At RIBA Stage 1, I developed high-level allowances based on structural complexity. I recognised that cantilevered support systems would require significant steel reinforcement and additional foundations. I factored these into my elemental estimate using benchmarked rates from similar structural works.

Question 7

How did you assess the cost implications of extending the walkway with cantilevered support and suspended pocket parks?

Answer 7

At RIBA Stage 1, I developed high-level allowances based on structural complexity. I recognised that cantilevered support systems would require significant steel reinforcement and additional foundations. I factored these into my elemental estimate using benchmarked rates from similar structural works.

Question 8

What were the key construction technology challenges associated with reinforcing the existing columns, and how did you factor these into your estimate?

Answer 8

The main challenges were working within a live building, temporary works, and strengthening existing columns without compromising the structure’s integrity. I allowed additional preliminaries for temporary works, structural strengthening costs, and potential access constraints.

Question 9

How did you approach allowances for structural integrity at such an early design stage (RIBA 1)?

Answer 9

At this stage, detailed design wasn’t available, so I used benchmarking from previous structural alteration projects. I applied contingency allowances to account for uncertainty and flagged to the client that the cost plan was subject to significant design development.

Question 10

How did your cost advice support the client’s decision-making between design options for the walkway extension?

Answer 10

By providing realistic allowances for structural complexity, I enabled the client to compare the cost implications of extending the walkway with suspended pocket parks versus simpler alternatives. My advice helped them understand that the design ambition would come with a higher budget impact and additional structural risks.

Question 11

What assumptions did you need to make when providing allowances for cantilevered structures, and how did you justify these to the design team/client?

Answer 11

I assumed heavier steel sections, strengthened foundations, and additional temporary works. I justified these assumptions by referencing industry benchmarks and experience on similar projects. I also made it clear these were provisional at Stage 1 and would need refinement once structural calculations were available.

Question 12

what is Cantilever Structures

Answer 12

A cantilever is a rigid structural element anchored at one end and free at the other. Loads applied at the free end create bending moments and shear forces at the support.

Question 13

what is the cost driver of Cantilever Structures

Answer 13

Larger/heavier steel sections or post-tensioning.

Complex fabrication and specialist labour.

Heavier foundations or anchorage points.

Additional preliminaries for temporary works and access.

Question 14

Structural Reinforcement of Existing Columns

Answer 14

Reinforcing existing columns strengthens their load-bearing capacity when new loads are introduced (e.g. extending a walkway).

Question 15

common methods for Structural Reinforcement of Existing Columns

Answer 15

1. Concrete Jacketing – enlarging the column by adding new reinforced concrete around it.
2. Steel Jacketing / Encasement – wrapping columns with steel plates or sections.
3. FRP (Fibre Reinforced Polymer) Wrapping – lightweight, corrosion-resistant.
4. Load Transfer – installing new adjacent columns or beams to share loads.

Question 16

How did you advise the client on the choice between the contractor’s proposed desludging method and the traditional method?

Answer 16

I analysed both options by comparing the projected sludge separation proportions, recovery rates, and disposal volumes. The contractor’s new method offered a cleaner phase separation, which increased the oil recovery rate and significantly reduced hazardous waste requiring disposal. I quantified the potential savings in disposal costs and compared them with the contractor’s pricing. I also highlighted the environmental benefits, including reduced risk of emulsion handling and improved sustainability outcomes. Based on this, I advised the client that while the upfront cost might be slightly higher, the long-term financial and environmental benefits made the new method a more advantageous option.

Question 17

What risks did you identify in adopting the new desludging method, and how did you advise the client to mitigate them?

Answer 17

: The key risks included the novelty of the method (limited track record), potential for lower-than-predicted recovery rates, and possible delays if the process underperformed. I advised the client to mitigate these risks by requiring the contractor to provide a detailed method statement, performance benchmarks, and contingency planning. I also recommended that the client monitor outputs closely during desludging and include contractual provisions to manage underperformance.