What is a dummy joint in construction?

A dummy joint in construction is a non-functional joint that is intentionally created in materials like concrete or masonry to simulate the appearance of a real joint. It serves primarily aesthetic purposes, helping to enhance the visual appeal of a structure by breaking up large surfaces and providing a uniform look. Dummy joints do not serve to relieve stress or accommodate movement, unlike true expansion or control joints. They are often used in decorative applications, such as in walls or pavements, to create patterns or designs.