Filled Arch

Arch-type expansion joints with embedded vacuum ring(s) may be supplied with a bonded-in-place soft rubber filler to provide a smooth interior bore. Filled arch joints also have a seamless tube so the arch filler cannot be dislodged during service. 

Filled arch, built as an integral part of the carcass, significantly restricts the flexibility of the joint and shall be used only when necessary. Movements of expansion joints with filled arch are limited to 50% of the normal movements of comparable size expansion joints with unfilled open arches.