Bailey Deck System Components

The deck system typically consists of three parts: transverse distribution beams, longitudinal distribution beams (or stiffeners), and the deck slab, which transfer loads sequentially from top to bottom.

Transverse Distribution Beams: Directly supported on the upper chords of the Bailey beams, these beams transfer the deck load to the main Bailey girders. Common materials include I-beams (e.g., I22b, I25b) or channel sections, with typical spacing ranging from 0.5 m to 1.0 m.

Longitudinal Distribution Beams/Stiffeners: Installed on top of the transverse beams, they help distribute the load transferred from the deck slab and provide continuous support for the deck. These are usually made of small I-beams (e.g., I12.6) or hardwood battens, spaced closely together.

Deck Slab: The surface layer directly supporting vehicle traffic. Common materials include checkered steel plates (8–12 mm thick), precast reinforced concrete slabs, or hardwood planks.