Bailey and adopted in early 1941 as a standard military bridge. Bailey type panel bridge trusses are substantially lighter and stronger than those of original
Bailey and the present design uses improved orthotropic steel decks in lieu of original timber decks.

Major components of Panel bridge are :

1. Panel - 10ft (3048mm) long and 4ft 9in (1448mm) high between pin - hole centres.
2. Panel pins & split pins.
3. Rakers.
4. Transoms - Two types for standard roadway width (3.27m) and extra - wide roadway width (4.250m).
5. Chord reinforcement.
6. Sway braces.
7. Steel deck units including holding down bolts, nuts & washers.
8. End posts ( Male & female type ).
9. Bearings.
10. Base plates.
11. Bracing frames & Bracing bolts.
12. Chord bolts.

All the above components are standardised, fully inter changable and could be carried by a sixman party. They are transportable using a 3-Ton truck to remote area sites and rapidly erected manually. They are 100% reusable in permanent, emergency or temporary applications.

The bridges are described according to the number of trusses and storeys which form the main girders. In all cases, the number of trusses are given first followed by number of storeys. However, "single double" "and single triple" form an unstable structure and must not be used.

There are, therefore, five possible combinations of girder panels, e.g. Single Single (S.S), Double Single (D. S), Triple Single (T. S), Double double (DD) and Triple Double (TD).

Aforesaid girder constructions can be reinforced further by bolting chord reinforcements to the top & bottom chords of trusses and such type of bridges are annotated by adding the letter 'R', e.g, DDR meams "double double reinforced".