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NRSWA Revision Street Works · England

O4 — Sub-base & Base (Non-bituminous)

Find It in the SROH

Look-up drills: you are given a heading and asked which document and section it belongs to.

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Free O4 questions: Find It in the SROH

These questions are in the practice set above. Answer them there to see the correct option and the explanation for each.

  • A gang is planning a reinstatement in a flexible road and needs the clause that sets out the sub-base options permitted there and the exceptions to those options, such as reducing a granular sub-base's thickness in return for a proportionately thicker bituminous binder course.
  • The base of a composite road has been broken through. The gang needs whatever settles what may go back in at base level there, and on what terms.
  • Foamed concrete is to go into a deep trench as the whole of the base and the sub-base, and none has been poured yet. The site needs whatever states how thick that layer must be at the least, and how strong, for the kind of road it is going into.

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NRSWA Revision: Street Works is independent revision material. It is not affiliated with, endorsed by or approved by HAUC(UK), SWQR, any awarding organisation or the Department for Transport, and it does not award a qualification or a card.