Explain on Internal Laminates or MS Shim?
Internal plates shall be ASTM A 36/A 36M or A 570/A 570M, Grade 36 or Grade 40. All plates shall be deburred. The internal plates shall not be less than 1.88 mm (0.074 inch) thick. The steel plates separating elastomeric layers will be completely bonded by vulcanization to elastomeric material on all surfaces using special metal to rubber bonding adhesive. All external load bearing steel plate(s) if present, shall be factory vulcanized to the elastomeric bearings during the primary molding process through hot vulcanization.