High Strength Steel Trestle Bridge / Steel Structure Bridge Q235 3.2m-3.7m Width

Steel Bridge Portable Bridge/high Strength Steel Structure Bridge

Bailey bridges, like all steel structures, are susceptible to corrosion, which can compromise their structural integrity. Here are the common signs of corrosion on Bailey bridges that you should look out for during inspections:

1. **Visible Rust and Corrosion**
- **Surface Rust**: Look for visible rust on steel components, especially on panels, transoms, and stringers. Rust is a clear indication of corrosion and should be addressed promptly.
- **Loss of Material**: Corrosion can lead to the loss of material, making components thinner and weaker. Check for any visible signs of material loss.

2. **Pitting and Surface Irregularities**
- **Pitting**: Pitting corrosion appears as small, often deep holes or cavities on the surface of the steel. This localized corrosion can significantly reduce the strength of the components.
- **Surface Irregularities**: Uneven surfaces or rough patches can indicate areas where corrosion has occurred.

3. **Cracks and Structural Damage**
- **Cracks**: Inspect for any cracks in the steel components. Cracks can form due to corrosion weakening the material.
- **Loose Connections**: Check for loose bolts, pins, or other connections. Corrosion can weaken these components, leading to instability.

4. **Deformation**
- **Bent or Warped Components**: Look for any signs of deformation, such as bent or warped panels or transoms. This can indicate that corrosion has weakened the structure.

5. **Coating Deterioration**
- **Peeling Paint**: If the bridge has a protective coating, look for signs of peeling or chipping paint. This can expose the steel to moisture and air, accelerating corrosion.

6. **Water Retention Areas**
- **Pooling Water**: Check for areas where water pools on the bridge surface or within the structure. Standing water can accelerate corrosion.

7. **Drainage Issues**
- **Blocked Drains**: Ensure that the drainage system is clear and functioning properly. Blocked drains can lead to water accumulation, which can cause corrosion.

8. **Unusual Noises**
- **Creaking or Grinding**: During use, listen for any unusual noises that might indicate structural issues caused by corrosion.

Conclusion
Regular inspections are crucial for identifying these signs of corrosion early. Prompt action, such as rust treatment, replacement of damaged components, and application of protective coatings, can help mitigate the effects of corrosion and extend the lifespan of Bailey bridges.

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