Type Of Steel Bridges/pedestrian Steel Bridge

Application of Type 321 Bailey Bridge in other emergency situations

Type 321 Bailey Bridge not only plays an important role in earthquake-stricken areas, but also has a wide range of applications in many other emergency situations. The following are specific application scenarios:

1. **Flood relief**
When a bridge is washed away or a road is interrupted due to a flood, the Type 321 Bailey Bridge can be quickly built to ensure the passage of rescue materials and personnel. For example, in a flood relief drill in Yulin City, 21 emergency rescue team members successfully built a Type 321 Bailey Bridge with a single span of 12 meters long and 3.75 meters wide in just one and a half hours, ensuring the smooth passage of vehicles.

2. **Military transportation**
Originally designed for military use, the Type 321 Bailey Bridge is widely used in military transportation and combat readiness projects. Its rapid construction and disassembly characteristics make it an important equipment in military projects.

3. **Traffic Engineering**
In traffic engineering, the 321-type Bailey bridge can be used to quickly build temporary bridges to ensure the continuity of traffic. It can be used to cross obstacles such as rivers, gullies, broken bridges, etc. to ensure the passage of vehicles and personnel.

4. **Municipal Water Conservancy Project**
In municipal water conservancy projects, the 321-type Bailey bridge can be used to build construction channels, temporary bridges, etc. Its high load-bearing capacity and rapid construction characteristics make it an important tool in water conservancy projects.

5. **Construction scaffolds or towers**
The components of the 321-type Bailey bridge are not only used for bridge construction, but also widely used as a variety of prefabricated steel structures such as construction scaffolds, gantries, cable hanging columns, etc. This versatility makes it widely used in construction projects.

6. **Temporary Passages**
The 321-type Bailey bridge can be used to build temporary passages, such as footbridges, trestles, etc. Its lightweight structure and rapid construction characteristics make it an ideal choice for temporary transportation facilities.

Summary
The 321-type Bailey Bridge has played an important role in various emergency situations such as flood control and rescue, military transportation, traffic engineering, municipal water conservancy projects, construction scaffolds or towers, and temporary passages due to its rapid construction, high load-bearing capacity, strong adaptability and versatility. These features make it an ideal choice for various complex engineering needs.

Specifications:

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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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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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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