AASHTO HL-93 Bailey Bridge with 1.2m Footways Pedestrian and Vehicle Modular Steel Bridge

AASHTO HL-93 Bailey Bridge with 1.2m Footways Pedestrian and Vehicle Modular Steel Bridge

Bailey Bridges Description:

The Type 200 bailey bridge and the Type 321 bailey bridge are a detachable and quickly erected bridge system. It is based on the British Compact-100 Bailey Bridge. The whole bridge is welded from high tensile strength steel. The main beam is a lightweight composite plate, and the panels are connected by panel connecting pins. The conversion between parts is easy, and they are very light. Easy to assemble or disassemble and transport. It can also be assembled into different forms of plate Bridges according to its span length and transportation requirements. Therefore, as a more developed and secure emergency transport bridge, it has been widely used.
 

Bailey Bridges Specifications:

Compact 200 Bailey bridge

SECTION PROPERTIES(ONE TRUSS)

ALLOWABLE STRESS OF PANEL

Material yield strength of panel σ_S=345MPa

Material allowable stress [σ]=0.8×σ_S=276 MPa

Allowable bearing stress [N]= [σ]×F×φ=276×2548×0.751=528kN=54t

Stability factor of chord SSφ_SS=0.751；DS φ_DS=0.897

Allowable moment of panel [M]= [N]×h=528×2.134=1127kN·m=115t·m

Bailey Bridges Introduction

Bailey Bridge is a standard bridge equipment, adopted extensively and the most popular in the world

Bailey Bridges Competitive Advantage:

Heavy loading capacity

Great stability

Long fatigue life

Light weight

Low cost

Easy and fast erection

Bailey Bridges Advantage

Possessing the features of simple structure
Convenient transport, speedy erection
Easy disassembling
Heavy loading capacity
Great stability and long fatigue life

Bailey Bridges Features

1. Standardized Connections for Reliable Structural Performance

The features of bailey bridge systems also include precision connection technology. Bolted joints, pinned connections, and fitted bearing interfaces allow modules to be joined securely while simplifying assembly. Well-designed connection points reduce the risk of misalignment, uneven load transfer, and installation errors. They also support repeatable performance when the bridge is taken down and reinstalled on a different site.

2. Adaptability to Different Site Conditions

Bailey bridge systems are valued for their ability to adapt to uneven terrain, varying support heights, and different crossing widths. Site conditions are often unpredictable: one project may involve a dry ditch, while another requires a span over flowing water, soft soil, or damaged roadway. Steel modular bridges can be configured to match these constraints without redesigning the entire structure from scratch.

Evercross Steel Bridges Overview:

Bailey Bridges Application

1. Temporary Road Diversions During Civil Works

One of the most common applications of the H200 Bailey Bridge is as a temporary diversion bridge during road reconstruction or widening projects. When an existing bridge must be repaired, replaced, or structurally upgraded, traffic cannot always be halted. In these situations, a modular bridge provides a practical detour that keeps vehicles moving while work continues on the permanent structure.

2. Emergency Bridge Replacement After Floods or Structural Failure

Natural disasters and unexpected structural damage often create urgent transportation challenges. Floods, landslides, earthquakes, and vehicle impact can render a bridge unusable in a matter of hours. In these scenarios, the HD200 Bailey Bridge is frequently selected as an emergency replacement because it can be transported to site in modular form and erected with relatively limited equipment.

Mixture form to erect all kinds of Bailey Bridges

Temporary Bridges, Emergency Bridges and Fixed Bridges.
Using the bridge equipment, the suspension bridges of varied span can be erected.
The bridge has the advantages of few components, light weight and low cost.
Bailey Bridge requires no special tools or heavy equipment for construction, the bridge elements are small enough to be carried in, and the bridge is strong enough to carry. It is considered a great example of EMERGENCY engineering.