Construction Technology

Question 1

What are the RIBA stages?

Answer 1

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

Question 2

What is the cross section of a carriageway?

Answer 2

Surface course (25-50mm), Binder course (50-100mm), sub-base and base (~200mm each)

Will vary slightly depending on the type of carriageway (type 0 to 4) in accordance with SROH (based on MSA - millions of standard axles)

Question 3

Can you give an example of a sustainable solution on the LFFN project?

Answer 3

Pre-formed chambers made of GRP - recyclable material:
- less machinery
- less wet trades
- faster and cheaper
- less repetitive movement

Question 4

Can you talk me through the process of installing a duct?

Answer 4

Once other utilities have been identified using CAT and genny, the process for installing new civil ducting is:
a. Break out existing surface with a jackhammer and a roadsaw
b. Excavate using an excavator or hand dig (depending on width restrictions) – utilities will be laid ~350mm deep
c. Compact bottom of the trench using a compact rammer
d. Lay type 1 hardcore bedding and the ducting in the trench
e. Run upvc / hdpe pipe and fibre optic cable through trenches and fibre joint / core into existing chamber
f. Backfill using excavated material
g. Make good with new surface course

Question 5

What were the cost savings associated with re-routing the ducting?

Answer 5

~£7k - rate for laying in CW compared to FW & V is significantly higher + TM costs

Question 6

You mention you are aware of the legislation and regulations that apply to telecoms and gas assets, can you pick out some of the regulations?

Answer 6

SROH
NRSWA
CDM
Street works uk / NJUG
HAUC
Cadent gas codes and specficiations
Guidance - HSE - HS(G)47 Avoiding Danger from Underground Services