Brick kilns are usually found on the outskirts of most developing towns and cities. The prevalent mode of work requires a resident labour force and most brick kilns employ seasonal migrant labour. Movements of brick kiln workers cross cut nationally. There are some major clusters from where workers migrate to brick kilns all over the country. These are some of the poorest areas of the country. For example, workers from the Bilaspur cluster in Chhattisgarh migrate to Uttar Pradesh, Gujarat and Od