Steel Pedestrian Bridge/steel Structure Pedestrian Bridge

Specific application of 450-type Bailey bridge in natural disasters

The application of 450-type Bailey bridge in natural disasters is mainly reflected in the following aspects:

1. **Quickly build rescue channels**
After natural disasters such as earthquakes, floods and hurricanes, 450-type Bailey bridges can be quickly built to provide transportation guarantee for rescue teams. The modular design of this bridge enables it to be assembled in a short time, ensuring that rescue materials and personnel can quickly reach the disaster area.

2. **Guarantee the transportation of materials and the evacuation of personnel**
Bailey bridges play a key role in the forward transportation of earthquake relief materials, the evacuation of the wounded and the evacuation of the masses. For example, during the 2008 Wenchuan earthquake, a large number of Bailey bridges were used for disaster relief and rescue, ensuring the smooth progress of rescue work.

3. **Temporary bridge solutions**
In the case of natural disasters that cause the destruction of existing bridges or interruption of roads, 450-type Bailey bridges can be used as temporary bridges. It can be quickly erected to ensure the continuity of traffic until the permanent bridge is repaired or rebuilt.

4. **Strong adaptability**
The 450-type Bailey bridge can adapt to different terrain and environmental requirements, and can provide reliable solutions whether it is crossing rivers, canyons or other obstacles. The flexibility of its design allows it to be adjusted according to actual needs to meet different engineering needs.

5. **High load-bearing capacity**
The 450-type Bailey bridge is designed to carry heavy loads and can meet the passage of various vehicles with a crawler load of 500 kN and a tire load of 300 kN (axle pressure of 130 kN). This makes it have important application value in projects that require the transportation of heavy equipment and materials.

6. **International standard certification**
The new Bailey bridge has simultaneously applied for three sets of standard certifications in China, the United States and Europe, with the goal of further expanding the global market. This shows that its design and manufacturing meet high international standards and can meet the engineering needs of different countries and regions.

In summary, the Type 450 Bailey Bridge has played an important role in natural disaster applications and provided strong support for rescue work due to its advantages such as rapid construction, high load-bearing capacity, strong adaptability and international standard certification.

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