The bearing pads shall be manufactured of all new (unused) materials and composed of multiple layers of prestressed 50/50 cotton-polyester blend duck, 8.1 ounce per net square yard, duck warp count 50 ± 1 threads per inch and filling count 40 ± 2 threads per inch, impregnated and bound with a high quality, oil-impervious nitrile rubber compound, containing rot and mildew inhibitors and anti-oxidants, compounded into resilient pads of uniform thickness. The pads shall withstand compressive loads perpendicular to the plane of laminations of not less than 10,000 psi before breakdown.
Properties Tested | ASTM Test Method | Value |
---|---|---|
Hardness Shore "A" | ASTM D2240 | 90 +- 5 |
Tensile Strength | ASTM D412 | 5,500 PSI |
Ultimate Elongation | ASTM D412 | 600% |
Specific Gravity | 1.21 | |
Compressive Load | 10,000 PSI | |
Shear Modulus | 450 PSI | |
Modulus of Elasticity | 23,000 | |
Temperature Range | -20F to +200F |
Finish = Smooth
Elastomer Type = Nitrile
Fabric type = Cotton with Polyester
Fungal resistant
D.O.T. Federal Standard Specifications for Construction Administration: of Roads and Bridges on Federal Highway Projects (1985).
AASHTO: Standard Specifications for Highway Bridges.
Preformed Fabric Pads: 16th Edition – 18.10.2 17th Edition – 18.4.9.1 2nd ED.LRFD – 18.10.2
Military Specifications
MIL-C-882, MIL-E-5272A , MIL-STD-810
Elastomeric Pad Thickness | Sheet Dimensions | Roll Dimensions |
---|---|---|
1/16" (1.6mm) | 48" (1219mm) x 96" (2438mm) | 48" (1219mm) x 300' (91.5 meter) |
1/8" (3.2mm) | 48" (1219mm) x 96" (2438mm) | 48" (1219mm) x 300' (91.5 meter) |
15/64" (6mm) | 48" (1219mm) x 96" (2438mm) | 48" (1219mm) x 300' (91.5 meter) |
11/32" (8.8mm) | 48" (1219mm) x 96" (2438mm) | N/A |
1/2" (12.7mm) | 48" (1219mm) x 96" (2438mm) | N/A |
3/4" (19mm) | 48" (1219mm) x 96" (2438mm) | N/A |
1" (25.4mm) | 48" (1219mm) x 96" (2438mm) | N/A |
2" (50.8mm) | 48" (1219mm) x 96" (2438mm) | N/A |