Simple Truss Modular Steel Bridge Prefabricated Galvanized Surface

Simple Steel Structure/prefabricated Steel

The time required to assemble a Bailey bridge can vary depending on several factors, including the length and complexity of the bridge, the number of workers involved, and the specific conditions at the construction site. However, in general, a Bailey bridge can be assembled relatively quickly due to its modular design and ease of construction.

General Assembly Time
- **Short and Single-Tier Bridge**: In ideal conditions, a short and single-tier Bailey bridge can typically be assembled in three to four hours.
- **Standard Bridge**: For a standard Bailey bridge, the assembly process usually takes between 24 to 48 hours.
- **Longer and More Complex Bridges**: The longest Bailey bridge ever built, which spanned 788 meters (2,585 feet) over the Derwent River in Australia, took around a year to complete. However, this was a highly complex and large-scale project.

Factors Affecting Assembly Time
1. **Bridge Size and Complexity**: Larger and more complex bridges naturally take longer to assemble. The number of panels, trusses, and other components required increases with the bridge's length and load capacity.
2. **Weather Conditions**: Adverse weather conditions, such as heavy rain or strong winds, can slow down the assembly process.
3. **Number of Workers**: The more skilled workers involved in the assembly, the faster the process can be completed. Typically, a team of 40 workers can construct a complete bridge.
4. **Site Preparation**: The time required for site preparation, including clearing and leveling the area and pouring the piers, can also impact the overall assembly time.

 Assembly Process Overview
The assembly process of a Bailey bridge involves several key steps:
1. **Site Preparation**: Clearing and leveling the construction site, and preparing the foundations for the bridge piers.
2. **Component Assembly**: Assembling the truss panels, transoms, and decking according to the design specifications.
3. **Installation**: Using methods such as the cantilever push-out method to install the assembled bridge components.
4. **Safety Inspection**: Conducting a thorough inspection to ensure the bridge's stability, alignment, and load-bearing capacity before it is opened to traffic.

In summary, the assembly time for a Bailey bridge can range from a few hours for a short, single-tier bridge to several days or even longer for larger and more complex structures. The specific time required will depend on the bridge's size, the number of workers, weather conditions, and the extent of site preparation needed.

Specifications:

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CB200 Truss Press Limited Table
NO.	Internal Force	Structure Form
		Not Reinforced Model				Reinforced Model
		SS	DS	TS	QS	SSR	DSR	TSR	QSR
200	Standard Truss Moment(kN.m)	1034.3	2027.2	2978.8	3930.3	2165.4	4244.2	6236.4	8228.6
200	Standard Truss Shear (kN)	222.1	435.3	639.6	843.9	222.1	435.3	639.6	843.9
201	High Bending Truss Moment(kN.m)	1593.2	3122.8	4585.5	6054.3	3335.8	6538.2	9607.1	12676.1
202	High Bending Truss Shear(kN)	348	696	1044	1392	348	696	1044	1392
203	Shear Force of Super High Shear Truss(kN)	509.8	999.2	1468.2	1937.2	509.8	999.2	1468.2	1937.2

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CB200 Table of Geometric Characteristics of Truss Bridge(Half Bridge)
Structure	Geometric Characteristics
	Geometric Characteristics	Chord Area(cm2)	Section Properties(cm3)	Moment of Inertia(cm4)
ss	SS	25.48	5437	580174
	SSR	50.96	10875	1160348
DS	DS	50.96	10875	1160348
	DSR1	76.44	16312	1740522
	DSR2	101.92	21750	2320696
TS	TS	76.44	16312	1740522
	TSR2	127.4	27185	2900870
	TSR3	152.88	32625	3481044
QS	QS	101.92	21750	2320696
	QSR3	178.36	38059	4061218
	QSR4	203.84	43500	4641392

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CB321(100) Truss Press Limited Table
No.	Lnternal Force	Structure Form
		Not Reinforced Model				Reinforced Model
		SS	DS	TS	DDR	SSR	DSR	TSR	DDR
321(100)	Standard Truss Moment(kN.m)	788.2	1576.4	2246.4	3265.4	1687.5	3375	4809.4	6750
321(100)	Standard Truss Shear (kN)	245.2	490.5	698.9	490.5	245.2	490.5	698.9	490.5
321 (100) Table of geometric characteristics of truss bridge(Half bridge)
Type No.	Geometric Characteristics	Structure Form
		Not Reinforced Model				Reinforced Model
		SS	DS	TS	DDR	SSR	DSR	TSR	DDR
321(100)	Section properties(cm3)	3578.5	7157.1	10735.6	14817.9	7699.1	15398.3	23097.4	30641.7
321(100)	Moment of inertia(cm4)	250497.2	500994.4	751491.6	2148588.8	577434.4	1154868.8	1732303.2	4596255.2

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Advantage

Possessing the features of simple structure,
convenient transport, speedy erection
easy disassembling,
heavy loading capacity,
great stability and long fatigue life
being capable of an alternative span, loading capacity