3.2 Structure of impingement plate

3.2.1 Standard type

3.2.2 Hinge-connection type
When several  rubber fenders are combined together and installed in a line horizontally, the design strength of impingement plates may be increased due to the large space between marine fenders. By use hinge-connection type impingement plates, the marine fenders can also be connected with each other by hinge connection method, thus make the impingement plate system lighter.

3.2.3 Enclosed type
Enclosed type impingement plate is composed of veneer and back support plate, so as to increase the structure strength. Water pressure test and sealing performance test should be given while manufacturing this type of impingement plate.

3.3 Layout methods for impingement plates

3.3.1 Horizontal installation layout  - when the marine rubber fenders are arranged in a line horizontally (like 1×1, 2×1, 3×1, etc.)

3.3.2  Vertical installation layout – when the marine fenders are arranged in a line vertically (like 1×1, 2×1, 3×1, etc.)

3.3.3 Combinational installation (like 2×2, 2×3, etc.)

4. Veneer
4.1 specification

Type	Size (L×W) (Thickness: 30mm or 40mm)
Flat plate	600×600	600×450	600×300	450×450	300×300
Angle plate	600×220	300×220	450×220	360×220

5.2 Rubber spring chain specification

Specification	Common link	End link	End shackle	Spring frame	Turnbuckle
SC630H	Φ20	Φ22	M×22	Φ32	M36
SC800H	Φ22	Φ25	M×25	Φ32	M36
SC1000H	Φ25	Φ28	M×28	Φ32	M36
SC1150H	Φ25	Φ28	M×28	Φ32	M36
SC1250H	Φ25	Φ28	M×28	Φ32	M36
SC1450H	Φ28	Φ30	M×30	Φ32	M36
SC1600H	Φ28	Φ30	M×30	Φ42	M42
SC1700H	Φ32	Φ34	M×34	Φ42	M42
SC2000H	Φ34	Φ36	M×36	Φ42	M48
SC2250H	Φ34	Φ36	M×36	Φ42	M48
SC2500H	Φ38	Φ40	M×38	Φ52	M52
SC3000H	Φ40	Φ42	M×42	Φ52	M56

5.3 Suspension chain
When the weight of the impingement plate exceeds the allowable load, a suspension chain should be utilized so as to prevent the drooping of the marine rubber fender.
The weight in the following chart refers to the allowable load (maximum weight) of the impingement plate, when the marine fenders are installed vertically in a line.

Specification Weight (kg) Type	630H	800H	1000H	1150H	1250H	1450H	1600H	1700H	2000H	2250H	2500H	3000H
P01	150	460	850	1140	1310	1370	1630	1770	2100	3050	3280	4570
P0	180	560	1030	1370	1570	1730	2070	2660	2680	3900	4330	6090
P1	235	720	1340	1780	2040	2380	2860	3140	3730	5430	6210	8820
P2	272	840	1550	2050	2360	2750	3220	3630	4330	6430	7430	-
P3	308	950	1750	2320	2670	3180	3840	4220	5020	7450	8680	-

Note: When the marine rubber fenders are installed horizontally in a line, the maximum weight of the impingement plate is 80% of the value in above chart.

6. The minimum installation space between supper cell rubber fenders
As the marine fender can be compressed into a drum-shape, there should be a proper space between fenders so as to prevent collision.

Specification	630H	800H	1000H	1150H	1250H	1450H	1600H	1700H	2000H	2250H	2500H	3000H
H(m/m)	880	1120	1500	1730	1870	2180	2400	2550	2880	3360	3730	4500

7. Small performance reduction in oblique compression conditions
Our TD-A type marine fender features small performance reduction in oblique compression conditions. This is a great advantage when there is a large space between fenders or when the berthing angle is large.
The following chart shows you the correction factors of the rubber fender's reaction force and energy absorption, when oblique compression forces act on the fender system.

Angle (degrees) correction factor	3	4	5	6	8	10	15
Reaction force correction factor (CR)	0.96	0.94	0.93	0.93	0.92	0.92	0.90
Energy absorption correction factor (CE)	0.94	0.92	0.87	0.87	0.84	0.80	0.72

8. Others
Notes to designers:
As shown in the following diagram, when the anchor bolt is embedded into a concrete structure, the distance between the anchor bolt and the concrete structure surface (L) should be larger than the length of the anchor bolt.
The embedded anchor bolt can also be welded onto the steel frame of the concrete structure, so as to prevent the mooring dolphin from being damaged when the marine rubber fender gets a shearing force or tensile force.

L for different types of supper cell rubber fenders.

Specification	630H	800H	1000H	1150H	1250H	1450H	1600H	1700H	2000H	2250H	2500H	3000H
L (mm)	330	360	430	500	500	570	570	620	700	700	700	800

Hengsheng is a China-based supper cell rubber fender manufacturer and supplier. Our company provides arch rubber fender, cone rubber fender, putty rubber seal, automobile woolen felt, chemical fiber felt, shipping facilities rubber sealed product, and others.