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Roof sheets come in various materials, including metal, asphalt, and fiberglass, and their widths can vary depending on the manufacturer and the intended application. Standard roof sheet widths typically range from 24 inches to 36 inches, although some materials may have widths up to 48 inches. The width chosen often depends on factors such as the overall design of the building, local climate conditions, and specific manufacturer offerings.
Return springs are essential for retracting the brake shoes after the brake pedal is released. They pull the shoes back into position, preventing them from dragging against the drum, which would lead to excessive wear and reduced fuel efficiency. Proper tension in the return springs is critical for the quick and effective operation of the brake system.
list the parts of a drum brake assembly
