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Available in Natural Rubber and Neoprene formulations, in rolls 36” and 48” wide in thicknesses up to 1” and in molded forms 36” and 48” widths in lengths up to 30’ (longer lengths available). For use where conformance to ASSHTO specifications is required. Note that some states have additional requirements – when ordering identify all requirements or submit individual state specifications. Custom shapes and sizes are available on a special order basis. Excellent load bearing resistance. Usually specified for bridge and building construction. |
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STYLE 71
Neoprene Unsupported AASHTO Bearing Pads |
Available in lengths up to 30’. Longer lengths available, please call for quote. Also available in 36" x 36" and 48" x 48" slabs. |
Temperature: -40°F to +170°F Finish: Smooth |
Durometer
Hardness
Shore ± 5 |
Thickness
(Inches) |
Width
(Inches) |
|
Ultimate
Elongation
Percent
(min) |
Estimated Weight
Per Linear Foot
(1/8" x 36") |
Specifications |
50 |
1/8 - 1 |
36, 48 |
2250 |
400 |
2.55 lb |
Hardness: ASTM D-2240
Tensile: ASTM D-412
Ozone: ASTM D-1149
Low Temperature: ASTM D-2137
Compression Set: ASTM D-395
Tear Resistance: ASTM D-624 |
60 |
1/8 - 1 |
36, 48 |
2250 |
350 |
2.59 lb |
70 |
1/8 - 1 |
36, 48 |
2250 |
300 |
2.61 lb |
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Certain states specify requirements other than standard AASHTO specifications. When ordering, identify all requirements or submit individual state specifications. Above meets the Standard Specifications for Highway Bridges, adopted by the American Association of State Highway and Transportation Officials. AASHTO M251 Unsupported Neoprene Bearing Pads are also available. |
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50 ± 5 Durometer
50-E-979
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60 ± 5 Durometer
60-E-986 |
70 ± 5 Durometer
70-E-869 |
ASTM D 573
Heat Resistance |
Change in durometer hardness,
max. points |
15 |
15 |
15 |
Change in tensile,
max. % |
-15 |
-15 |
-15 |
Change in ultimate elongation,
max. % |
-40 |
-40 |
-40 |
ASTM D 395
Compression Set |
22 hours at 212°F, max. % |
35 |
35 |
35 |
ASTM D 1149
Ozone |
100 pphm ozone in air by volume,
20% strain, 100°F ± 2°F 100 hours mounting procedure D518,
Procedure A |
no cracks |
no cracks |
no cracks |
ASTM D 746
Low Temperature Brittleness |
Grade 3
at -40°F |
no failure |
no failure |
no failure |
ASTM D 1043
Instantaneous Thermal Stiffening |
Grade 3
at -40°F |
Stiffness at test time shall not exceed 4 times the stiffness measured at 73°F
|
Low Temperature Crystallization
Quad Shear Test
|
Grade 3
14 days at -15°F |
Stiffness at test time and temperature shall not exceed 4 times the stiffness measured at 73°F with no time delay
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STYLE 72
Natural Rubber Unsupported AASHTO Bearing Pads |
Natural Rubber Unsupported AASHTO Bearing Pads are available in Grade 3 and Grade 4 in lengths up to 30'. Longer lengths available, please call for quote. Also available in 36" x 36" and 48" x 48" slabs. Black in Color. |
Finish: Smooth |
Durometer
Hardness
Shore ± 5 |
Thickness
(Inches) |
Width
(Inches) |
Tensile
PSI
(min) |
Ultimate
Elongation
Percent
(min) |
Temperature
Range |
Estimated Weight
Per Linear Foot
(1/8" x 36") |
Specifications |
50 |
1/8 - 1 |
36, 48 |
2250 |
450 |
Grade 3: -40°F to +170°F
Grade 4: -50°F to +170°F |
2.16 lb |
Hardness: ASTM D 2240
Tensile: ASTM D 412
Elongation: ASTM D 412 |
60 |
1/8 - 1 |
36, 48 |
2250 |
400 |
Grade 3: -40°F to +170°F
Grade 4: -50°F to +170°F |
2.26 lb |
70 |
1/8 - 1 |
36, 48 |
2250 |
300 |
Grade 3: -40°F to +170°F
Grade 4: -50°F to +170°F |
2.34 lb |
|
Certain states specify requirements other than standard AASHTO specifications. When ordering, identify all requirements or submit individual state specifications. Above meets the Standard Specifications for Highway Bridges, adopted by the American Association of State Highway & Transportation Officials. |
| |
| |
|
60 ± 5 Durometer
|
70 ± 5 Durometer
|
ASTM D 573
Heat Resistance |
Change in durometer hardness,
max. points |
10 |
10 |
10 |
Change in tensile,
max. % |
-25 |
-25 |
-25 |
Change in ultimate elongation,
max. % |
-25 |
-25 |
-25 |
ASTM D 395
Compression Set |
22 hours at 158°F,
max. % |
25 |
25 |
25 |
ASTM D 1149
Ozone |
25 pphm ozone in air by volume,
20% strain, 100°F ± 2°F 48 hours mounting procedure D518,
Procedure A |
no cracks |
no cracks |
no cracks |
ASTM D 746
Low Temperature Brittleness |
Grade 3
at -40°F |
Grade 4
at -55°F |
no failure |
no failure |
no failure |
ASTM D 1043
Instantaneous Thermal Stiffening |
Grade 3
at -40°F |
Grade 4
at -50°F |
Stiffness at test time shall not exceed 4 times the stiffness
measured at 73°F
|
Low Temperature Crystallization
Quad Shear Test |
Grade 3
14 days at -15°F |
Grade 4
21 days at -35°F |
Stiffness at test time and temperature shall not exceed 4 times the stiffness measured at 73°F with no time delay
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