scope:

The Scope of this Manual is to provide guidance on the application of the requirements for the Bridge Structure assets owned by LU through the life cycle stages:

Inception and design;

Construction, installation, testing and commissioning;

Inspection;

Analytical assessment;

Condition assessment and certification;

Maintenance;

Strengthening and renewal;

Decommissioning.

This Manual mirrors the sub-section headings of LU Standard 1-051 (Civil Engineering - Bridge Structures) at the start of each life cycle section, but additionally has further sub-sections added to each life-cycle section where there is further guidance material available to LU that does not specifically relate to the sub-section headings used in the standard, or is better set out separately.

The information contained in this Manual is derived mainly from historical information contained in existing LU documents and therefore does not necessarily reflect current good practice. Where possible, existing historical information has been supplemented by references to current good industry practice.

This Manual replaces G-051 A2.

Purpose

The purpose of this Manual of Good Practice is to support LU Standard 1-051 (Civil Engineering - Bridge Structures) and provides guidance on established good practice solutions that meet the requirements of that standard. The Bridge Structure assets comprise:

Rail bridges;

This category of structure covers structures owned by LU carrying LU tracks, including:

Underbridge;

Overbridge;

Viaduct;

Girdering;

Way beams.

Highway bridges; This category of structure covers structures owned by LU carrying public or private road traffic, including:

Overbridge;

Viaduct.

Footbridges;

Underground structures; This category of structure covers:

Covered ways;

Subsurface tunnels (i.e. cut and cover tunnel);

Subways;

Culverts.

Earth retaining walls, including gabions;

Ancillary structures and components; This category of structure covers:

Cable bridges;

Pipe bridges;

Pipe crossings over / under track;

Signal gantries;

Gantries over railway;

Crash barriers;

Longitudinal timbers.