Various Span Steel Bridge/small Steel Bridges

If you spot rust on a bridge, it is important to take prompt action to prevent further corrosion and ensure the structural integrity of the bridge. Here are the steps you should consider:

1. **Report the Rust**
- **Contact the Bridge Maintenance Authority**: If you are not responsible for the bridge’s maintenance, immediately report the rust to the local transportation department, bridge maintenance team, or the relevant authority. Provide details about the location and extent of the rust.

2. **Initial Assessment**
- **Inspect the Rust**: Determine the extent and severity of the rust. Check if it is localized or widespread, and whether it affects critical structural components.

3. **Rust Removal Methods**
- **Mechanical Removal**: Use tools like steel wool, a wire brush, or a power grinder to remove surface rust. This method is effective for larger areas.
- **Chemical Removal**: Apply rust-removing solutions such as a mixture of baking soda and lemon juice, or citric acid powder mixed with water. These solutions can help dissolve rust and are less abrasive than mechanical methods.
- **Electrolysis**: For more severe rust, consider using an electrolysis setup to remove rust from metal objects. This method involves submerging the rusted object in a solution and using a sacrificial anode to attract the rust.

4. **Protective Measures**
- **Coating and Painting**: After removing the rust, apply a protective coating or paint to prevent future corrosion. Use corrosion inhibitors or galvanized coatings for long-term protection.
- **Regular Maintenance**: Ensure that the bridge is regularly inspected and cleaned to prevent the accumulation of debris and moisture, which can lead to rust.

5. **Professional Help**
- **Consult Experts**: For large-scale or severe rust issues, it is advisable to consult professional bridge maintenance engineers or corrosion experts. They can provide specialized treatments and long-term solutions.

By taking these steps, you can effectively address rust on bridges and help maintain their durability and safety.

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