China Wholesale Panel Bridge/china Products Panel Bridge

Suitability of Type 321 Bailey Bridge in Extreme Weather

Type 321 Bailey Bridge has strong suitability in extreme weather, but its use needs to be adjusted and evaluated according to specific circumstances. The following is the specific information:

1. **Structural stability**
Type 321 Bailey Bridge has been rigorously calculated and tested and has strong load-bearing capacity and seismic resistance[^1030^]. This structural design enables it to withstand the impact of extreme weather, such as strong winds, heavy rains, and low temperatures to a certain extent.

2. **Extreme low temperature environment**
In extremely low temperature environments, the steel of Bailey Bridge may become brittle, affecting its structural strength. Therefore, when used in cold areas, additional insulation measures are required for the bridge to prevent the steel from becoming brittle due to low temperatures[^1031^].

3. **Extreme high temperature environment**
In high temperature environments, the steel of Bailey Bridge may affect its structural stability due to thermal expansion. Therefore, when used in high temperature areas, it is necessary to consider the thermal expansion coefficient of steel and take corresponding measures, such as adding support structures[^1031^].

4. **Strong wind environment**
Bailey bridges may be greatly affected in strong wind environments, especially when the bridge is long or high. Therefore, when used in strong wind areas, additional wind resistance design of the bridge is required, such as adding wind resistance tie rods[^1030^].

5. **Heavy rain and flood environment**
In heavy rain and flood environments, Bailey bridges may be impacted and eroded by water flow. Therefore, when used in these environments, additional reinforcement measures are required for the bridge, such as increasing the stability of the piers[^1030^].

Summary
The 321 type Bailey bridge has certain applicability in extreme weather conditions, but it needs to be adjusted and evaluated according to specific circumstances. When used in environments such as extreme low temperature, high temperature, strong wind, heavy rain and flood, corresponding measures need to be taken to ensure the safety and stability of the bridge[^1030^][^1031^].

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