Product Structure

The core component of the Type 321 Bailey bridge is the standardized truss unit (Bailey panel). The standard dimensions of a single Bailey panel are 3 meters long, 1.5 meters wide, and 176 millimeters high, weighing approximately 270 kilograms. The truss consists of upper and lower chords (10-channel steel welded back to back), vertical members (8-beam steel), and diagonal members. The ends are equipped with male and female connectors and connecting pin holes for easy rapid assembly. By connecting multiple Bailey panels, bridges of different spans can be flexibly constructed. The applicable span range for a single span is 9 meters to 63 meters (simply supported beam), with a maximum span of 69 meters or 76.2 meters. Support frames are needed to reinforce the joints of multiple rows of trusses to enhance stability. Constructed from 16Mn high-strength steel, the components are highly interchangeable and connected by pins to ensure structural safety.

Product Categories

DSR

DDR

TSR

TDR

8SR

Component Quantity Table for Type 321 Reinforced Steel Bridge (U-shaped Steel Plate Bridge)
Combination form	Single-row single-layer reinforced type						Double-row single-layer reinforced type										Three-row single-layer reinforced type							Double-row double-layer reinforced type							Three-row double-layer reinforced type
Span (M)	18	21	24	27	30	33	18	21	24	27	30	33	36	39	42	45	33	36	39	42	45	48	51	42	45	48	51	54	57	60	45	48	51	54	57	60	63	66	69
Number of Sections	6	7	8	9	10	11	6	7	8	9	10	11	12	13	14	15	11	12	13	14	15	16	17	14	15	16	17	18	19	20	15	16	17	18	19	20	21	22	23
Truss	12	14	16	18	20	22	24	28	32	36	40	44	48	52	56	60	66	72	78	84	90	96	102	112	120	128	136	144	152	160	180	192	204	216	228	240	252	264	275
Strengthening Rod	16	20	24	28	32	36	32	40	48	56	64	72	80	88	96	104	108	120	132	144	156	168	180	96	104	112	120	128	136	44	156	168	180	192	204	216	228	240	252
Pin	44	52	60	68	76	84	88	104	120	136	152	168	184	200	216	232	252	276	309	324	348	372	396	328	352	376	400	424	448	472	528	564	600	636	672	708	\|744	780	816
Crossbeam Fixture	13	15	17	19	21	23	13	15	17	19	21	23	25	27	29	31	23	25	27	29	31	33	35	29	31	33	35	37	39	41	31	33	35	37	39	41	43	45	47
Crossbeam Fixture	24	28	32	36	40	44	48	56	64	72	80	88	96	104	112	120	132	144	156	168	180	192	204	112	120	128	136	144	152	160	180	192	204	216	228	240	2252	264	276
Standard Bridge Deck	24	28	32	36	40	44	48	56	64	72	80	88	96	104	112	120	132	144	156	168	180	192	204	112	120	128	136	144	152	160	180	192	204	216	228	240	252	264	276
Intermediate Bridge Deck	6	7	8	9	10	11	6		8	9	10	11	12	13	14	15	11	12	13	14	15	16	17	14	15	16	17	18	19	20	15	16	17	18	19	20	21	22	23
Cutting Edge	12	14	16	18	20	22	12	14	16	18	20	22	24	26	28	30	22	24	26	28	30	32	34	28	30	32	34	36	38	40	30	32	34	36	38	40	42	44	46
Positive End Column	2	2.	2	2	2	2	4	4	4	4	4	4	4	4	4	4	6	6	6	6	6	6	6	4	4	4	4	4	4	4	6	6	6	6	6	6	6	6	6
Negative End Column	2	2	2	2	2	2	4	4	4	4	4	4	4	4	4	4	6	6	6	6	6	6	6	4	4	4	4	4	4	4	6	6	6	6	6	6	6	6	6
Diagonal Bracing Bolt	14	16	18	20	22	24	14	16	18	20	22	24	26	28	30	32	24	26	28	30	32	34	36	30	32	34	36	38	40	42	32	34	36	38	40	42	44	46	48
Support Frame	-	-	-	-	-	-	12	14	16	18	20	22	24	26	28	30	22	24	26	28	30	32	34	58	62	66	70	74	78	82	62	66	70	74	78	82	86	90	94
Connecting Plate	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	24	26	28	30	32	34	36	-	-	-	-	-	-	-	64	68	72	76	80	84	88	92	96
Wind-Resistant Tie Rod	12	14	16	18	20	22	12	14	16	18	20	22	24	26	28	30	22	24	26	28	30	32	34	28	30	32	34	36	38	40	30	32	34	36	38	40	42	44	46
Bridge Abutment	4	4	4	4	4	4	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Seat Plate	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Chord Bolt	32	40	48	56	64	72	64	80	96	112	128	144	160	176	192	208	216	240	264	288	312	336	360	292	308	324	340	356	372	388	312	336	360	384	408	432	456	480	504
Diagonal Bracing Bolt	28	32	36	40	44	48	28	32	36	40	44	48	52	56	60	64	48	52	56	60	64	68	72	60	64	68	72	76	80	84	64	68	72	76	80	84	88	92	96
Bridge Frame Bolt		-		-			48	56	64	72	80	88	96	104	112	120	88	96	104	112	120	128	136	232	248	264	280	296	312	328	248	264	280	296	312	328	344	360	376
Type 1 Bolt	63	72	81	90	99	108	63	72	81	90	99	108	117	126	135	144	108	117	126	135	144	153	162	135	144	153	162	171	180	189	144	153	162	171	180	189	198	207	216
M20 Bolt	60	70	80	90	100	110	60	70	80	90	100	110	120	130	140	150	110	120	130	140	150	160	170	140	150	160	170	180	190	200	150	160	170	180	190	200	210	220	230
Note: 1. No reinforcing bars are installed on the first two sections of the bridge. 2. The number of components listed in the table does not include the amount used for the access roads to the steel bridge.

Product Advantages

Rapid Assembly: Modular components allow for quick assembly and disassembly, suitable for emergency rescue and temporary projects.
High Strength and Lightweight: Steel structures are relatively high-strength and lightweight, resulting in low transportation costs; they can be transported in bulk using ordinary vehicles.

High Flexibility: Span, lanes, and loads can be adjusted to different terrains.
Easy Interchangeability: Standardized, universal components facilitate maintenance and replacement, reducing costs.
Wide Application: Compatible with various foundation types and adaptable to complex geological conditions.

Application Scenarios

Emergency Support:Rapidly clearing temporary access routes for flood control, earthquake relief, and military operations.
Infrastructure Construction:Temporary bridges for bridge construction, construction platforms across rivers or roads, and precast beam storage supports.

Municipal and rural transportation: temporary bridges across streams in rural areas, temporary access roads for municipal pipeline construction, and pedestrian or vehicular bridges in scenic areas.
Other: access roads for mining operations, access roads for oil fields, and temporary access roads for events/exhibitions, etc.

If you need more information about the 321 Bailey bridge or want to get a quote, please feel free to contact me. I will provide you with professional service!

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