Steel Portable Bridge Rd Clayton Nc / Structural Steel Bridge

Steel Bridge Rd Clayton Nc/structural Steel Bridge

The difference between Type 200 Bailey Bridge and Type 321 Bailey Bridge

Type 200 Bailey Bridge and Type 321 Bailey Bridge are both prefabricated steel bridges widely used in bridge engineering, but there are some significant differences in their design, structure and scope of application:

1. **Design and structure**
- **Type 200 Bailey Bridge**:
- The truss height is increased to 2.134 meters, which is higher than the 1.76 meters of Type 321.
- The joints between the reinforced chords and the joints between the trusses are staggered to reduce the inelastic deformation caused by the pin hole gap, and the pre-arch method is used to greatly reduce the vertical deflection of the bridge span.
- The bolt connection components are positioned and fixed by the guide sleeve, which increases the product connection accuracy and the service life of the bolts.
- The wind-resistant tie rod is made into an integral type and connected to the beam to improve the overall stability of the prefabricated steel bridge.

- **Type 321 Bailey Bridge**:
- The truss height is 1.76 meters, and the structure is relatively compact.
- A simple pin-hole connection method is used, which is convenient for quick assembly and disassembly.
- Applicable to a variety of load levels, including car-10, car-15, car-20, crawler-50, trailer-80, etc.

2. **Scope of application**
- **Type 200 Bailey Bridge**:
- The clear width of the single-lane bridge deck is 4.2 meters, and the clear width of the double-lane bridge deck is 7.4 meters.
- The combined span range is 9.14 meters to 76.2 meters (single lane) and 9.14 meters to 57.9 meters (double lane).
- Applicable to load designs such as car-10, car-20, HS, HL93, crawler-50, etc.

- **Type 321 Bailey Bridge**:
- The clear width of the single-lane bridge deck is 3.7 meters.
- The combined span range is 9 meters to 63 meters.
- Suitable for loads such as car-10, car-15, car-20, crawler-50, trailer-80, etc.

3. **Features and advantages**
- **200 type Bailey bridge**:
- Various structural forms, higher bearing capacity, suitable for large span and heavy load requirements.
- The design is more modern, using pre-arch and guide sleeve technology to improve the stability and service life of the bridge.
- It can be assembled into a double-lane bridge, expanding the scope of use.

- **321 type Bailey bridge**:
- The components are light, easy to disassemble and assemble, and have strong adaptability. It can be quickly built with simple tools and manpower.
- It is widely used in national defense preparation, transportation engineering, and municipal water conservancy projects.
- It is suitable for a variety of load levels and has good interchangeability and flexibility.

Summary
The 200-type Bailey bridge is more modern in design and structure, suitable for large spans and heavy loads, while the 321-type Bailey bridge is widely used in a variety of engineering scenarios due to its light weight, easy assembly and disassembly, and strong adaptability. The choice of which type of Bailey bridge should be determined based on the specific engineering requirements and usage environment.

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