A very low pressure flexible ducting element that consists of round or rectangular fabric bellows sections and accompanying end connections. Most motions allowed.ASPHALT EXPANSION JOINT is composed of a blend of asphalts, vegetable fibers, and mineral fillers formed under heat and pressure between two asphalt-saturated liners. It is waterproof, permanent, flexible, and self-sealing.FIBRE EXPANSION JOINT is versatile, resilient, flexible, and non-extruding.
The expansion joint Use : An expansion joint or movement joint is an assembly designed to safely absorb the heat-induced expansion and contraction of construction materials, to absorb vibration, to hold parts together, or to allowmovement due to ground settlement or earthquakes.
Bridges are made of steel, which expands and contracts with temperature. A span long enough to need expansion joints may expand or contract several inches in the course of a year. Without those joints, either the bridge butt joints would crush and buckle in hot weather, or the bridge would pull apart in cold weather.
An expansion joint is a material placed in the cracks (or joints) between concreteslabs to protect the slabs from cracking when they contract and expand as the temperature changes.
In building construction, an expansion joint is a mid-structure separation designed to relieve stress on building materials caused by building movement induced by: thermal expansion and contraction caused by temperature changes, sway caused by wind. seismic events.