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Drainage & Piped Services Standard Specification
Version 2014-1
Brick Shallow Silt Trap and Flow Control Chamber System for Below Ground Drainage
System Performance: Design of access chambers for below ground drainage type The chamber is to be
suitably sized and accessible to be used a sampling point.
Base slabs: Designated concretes for drainage applications type A.
Walls:
Masonry units: Class B engineering bricks
Mortar: Submit proposals.
Support above pipes: Precast concrete lintels.
Benchings and toppings:
Benching: Designated concretes for drainage applications type D.
Topping: Wearing screed
Flow control:
Devices: Orifice plate flow control units type A and Vortex flow control units type A.
Drain down valves: Submit proposals.
Access components: Access chamber steps type B.
Covers:
Cover slabs:
Concrete: Designated concretes for drainage applications type E.
Reinforcement: Submit proposals.
Seating: Bricks type C and Precast concrete access cover seatings type B.
Covers and frames: Access covers and frames type B.
Backfill: Submit proposals.
Execution: Formation for beddings in below ground drainage monitoring and control systems type B;
Constructing brick shallow access chambers for below ground drainage type B;
Installing vortex flow control units in access chambers for below ground drainage type A;
Fixing steps in below ground drainage monitoring and control systems type B;
and Installing access covers and frames to chambers for below ground drainage type B.
System Completion: Removal of debris and cleaning below ground drainage monitoring and control
systems type A; Water testing of manholes and inspection chambers for below ground drainage monitoring
and control systems type A; Testing of ancillary components in below ground drainage monitoring and
control systems type A; and Documentation type A.
System Performance
Design of access chambers for below ground drainage type the chamber is to be suitably sized and
accessible to be used a sampling point
Design: Complete the design of the access chamber system.
Products
Designated concretes for drainage applications type A
Source: Submit proposals.
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McDonalds Restaurants Ltd
