Temporary Steel Bridge / Modular Steel Bridge ISO9001 3m 3.048m Panel Length

Temporary Steel Bridge/modular Steel Bridge

The frequency of bridge inspections depends on various factors, including the bridge's condition, type, environment, and traffic load. Here are the general guidelines based on the latest regulations and standards:

1. **Routine Inspections**
- **Standard Interval**: Each bridge must be inspected at regular intervals not exceeding 24 months. 
- **Reduced Intervals**: For bridges with serious or worse condition ratings (coded 3 or less) for deck, superstructure, substructure, or culvert components, or those with serious scour conditions, inspections must be conducted at intervals not exceeding 12 months.
- **Extended Intervals**: Bridges in satisfactory or better condition (coded 6 or greater) for all components, with stable foundations and no significant deficiencies, may be inspected at intervals not exceeding 48 months.

2. **Underwater Inspections**
- **Standard Interval**: Underwater inspections must be conducted at intervals not exceeding 60 months.
- **Reduced Intervals**: For bridges with underwater components in serious or worse condition (coded 3 or less), or those with significant scour or channel protection issues, inspections must be conducted at intervals not exceeding 24 months.

3. **Special Inspections**
- **Fracture-Critical Members**: Bridges with fracture-critical members (steel members in tension that are not load path redundant) must undergo detailed inspections at intervals not exceeding 24 months.
- **Damage Inspections**: Unscheduled inspections must be conducted immediately following significant events such as floods, earthquakes, fires, or traffic collisions.

4. **Complex Bridge Inspections**
- Bridges with complex features (e.g., cable suspension, moving parts) should be inspected on the same frequency as routine inspections (typically every 24 months).

5. **Scour-Critical Structures**
- Scour-critical structures should be monitored during and after major flood events. If significant scour or settlement is observed, an in-depth inspection must be conducted immediately.

Conclusion
Regular and timely inspections are crucial for maintaining bridge safety and identifying potential issues early. The specific inspection frequency should be determined based on the bridge's condition, type, and environmental factors, following the guidelines outlined in the relevant regulations.

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