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Drainage & Piped Services Standard Specification
Version 2014-1

Brick Manhole System for Below Ground Drainage
System Performance: Design of access chambers for below ground drainage type B.
Base slabs: Designated concretes for drainage applications type F.
Walls:

Masonry units: Class B engineering bricks
Mortar:
Support above pipes: Precast concrete lintels.
Preformed channels and benching:
Preformed channels: Plastics channels for access chambers type B and Vitrified clay channels
for access chambers type B.
Benching: Designated concretes for drainage applications type G.
Topping: Wearing screed
Reducing slabs:
Concrete: Designated concretes for drainage applications type H.
Reinforcement: Submit proposals.
Access components: Access chamber ladders type A and Access chamber steps type C.
Covers:
Cover slabs:

Concrete: Designated concretes for drainage applications type I.
Reinforcement: Submit proposals.
Seating: Submit proposals.
Covers and frames: Access covers and frames type C.
Backfill: Submit proposals.
Execution: Formation for beddings in below ground drainage monitoring and control systems type A;
Formation for beddings in below ground drainage monitoring and control systems type B; Fixing steps in
below ground drainage monitoring and control systems type A; Fixing steps in below ground drainage
monitoring and control systems type B; Laying preformed plastics channels, branches and benching in
access chambers for below ground drainage type A; Laying sealed access fittings, branches and benching in
access chambers for below ground drainage type A; Installing access covers and frames to chambers for
below ground drainage type A; and Installing access covers and frames to chambers for below ground
drainage type B.

System Completion:

System Performance

Design of access chambers for below ground drainage type B

Design: Complete the design of the access chamber system.

Standards: To BS EN 752 and in accordance with National Annex NA;
In accordance with Sewers
In accordance with Sewers for adoption;
and In accordance with Sewers for Scotland. for adoption,
Northern Ireland;

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