Which joint type is designed to accommodate movement in multiple directions, including both parallel and perpendicular movement?

Which joint type is designed to accommodate movement in multiple directions, including both parallel and perpendicular movement?

• A. Pourable seal
• B. Strip seal
• C. Cellular joint seal
• D. Compression joint seal

Answer: (C)

This question is about which seal type can flex in more than one direction. A cellular joint seal uses a grid-like network of interconnected cells that can expand, compress, and shear as the adjacent slabs move. That cellular structure lets the seal accommodate movement along the joint (parallel) and also across it (perpendicular), maintaining a seal even when the joints experience complex shifts or rotations. Other seals are more limited in directionality. Pourable sealants fill the gap and seal, but they mainly handle one-dimensional movement within the filled space. Strip seals provide a continuous seal along the joint and handle movement along the joint axis, not as much movement across the joint. Compression joint seals use solid, compressible blocks that absorb some displacement, but they don’t offer the same multidirectional deformability as a cellular design.

This question is about which seal type can flex in more than one direction. A cellular joint seal uses a grid-like network of interconnected cells that can expand, compress, and shear as the adjacent slabs move. That cellular structure lets the seal accommodate movement along the joint (parallel) and also across it (perpendicular), maintaining a seal even when the joints experience complex shifts or rotations.

Other seals are more limited in directionality. Pourable sealants fill the gap and seal, but they mainly handle one-dimensional movement within the filled space. Strip seals provide a continuous seal along the joint and handle movement along the joint axis, not as much movement across the joint. Compression joint seals use solid, compressible blocks that absorb some displacement, but they don’t offer the same multidirectional deformability as a cellular design.