scope:

This Standard applies to Bridge Structure assets owned by LU.

This Standard defines the requirements for assets through the following lifecycle stages:

a) Inception and design

b) Construction, installation, testing and commissioning

c) Inspection

d) Analytical assessment

e) Condition assessment and certification

f) Maintenance

g) Strengthening and Renewal

h) Decommissioning

i) Evidence of compliance

This issue of the standard replaces 1-051 A2.

Purpose

The purpose of this Standard is to define the whole life cycle requirements for Bridge Structure assets. These assets comprise:

a) Rail bridges

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

I) Underbridge;

II) Overbridge;

III) Viaduct;

IV) Girdering;

V) Way beam;

b) Highway bridges

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

I) Overbridge;

II) Viaduct;

c) Footbridges

d) Underground structures

This category of structure covers:

I) Covered Ways;

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

III) Subways;

IV) Culverts;

e) Earth retaining walls, including gabions;

f) Ancillary structures and components;

This category of structure covers:

I) Cable bridges;

II) Pipe bridges;

III) Pipe crossings over / under track;

IV) Signal gantries;

V) Gantries over railway;

VI) Crash barriers;

VII) Longitudinal Timbers;

In defining requirements specifically applicable to assets, this Standard complements Standard 1-050 (Civil Engineering - Common Requirements) that defines mandatory requirements generally applicable to all Civil Engineering assets including the Bridge Structure assets.

A supporting Manual of Good Practice G-051 gives guidance and explanation on Bridge Structure assets.

Note: Structural elements of stations within tunnels are included in LU Standard 1-055 (Civil Engineering - Deep Tube Tunnels and Shafts)

Drainage to Bridge Structures is included within LU Standards 1-052 (Civil Engineering - Gravity Drainage Systems) and 1-056 (Civil Engineering - Pumping Systems)

Station Planning requirements including spatial requirements are included in LU Standard 1-371 (Station Planning)

Station platform finishes, tolerances tactile warning strips and safety markings are included in LU Standard 1-131 (Premises - Station Platforms)

Stairways and ramp requirements are included in LU Standard 1-133 (Premises - Stairways and Ramps)

Ladders and Step Iron requirements for drainage installations are included within LU Standard 1-052 (Civil Engineering - Gravity Drainage Systems)

Guidance on the requirements for barriers is given within LU standard 1-132 (Premises - Barriers)