AASHTO Unsupported Molded Neoprene Bearing Pads

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AASHTO Unsupported Molded Neoprene Bearing Pads

Also available in 36" and 48" rolls.

Thickness Tolerance:

  1. 1.25" thick or less = +0.125/-0

Width Tolerance:

  1. 36" width = +0.25"/-0
  2. 48" width = +0.5"/-0

Finish: Smooth

Durometer
Hardness
Shore A ± 5
Thickness
(Inches)
Size
(Inches)
Tensile
PSI
Ultimate
Elongation
Percent
Temperature
Range
Estimated Weight
Per Linear Foot
(1/2" x 36")
Specification Store
50
050E0979
1/4 - 1 36x36
48x48
2700 480 -40°F to +220°F 10.15 lb AASHTO Grade 3 Neoprene
60
060E0986
1/4 - 1 36x36
48x48
2650 380 -40°F to +220°F 10.31 lb AASHTO Grade 3 Neoprene
70
070E0869
1/4 - 1 36x36
48x48
2650 320 -40°F to +220°F 10.39 lb AASHTO Grade 2 Neoprene

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.

ASTM Test
Method
Property Durometer Hardness
50 Shore A ± 5
50-E-0979
Durometer Hardness
60 Shore A ± 5
60-E-0986
Durometer Hardness
70 Shore A ± 5
70-E-0869
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