Rectangular beams are structural elements commonly used in construction and engineering. They have a rectangular cross-section, which provides strength and stability. These beams can be made from various materials, including steel, concrete, and wood, and are designed to support loads in buildings, bridges, and other structures. The design of rectangular beams takes into account factors such as load capacity, span length, and material properties. Engineers use principles from mechanics and structural analysis to ensure that the beams can safely carry the intended loads without bending or breaking. Properly designed beams are essential for the safety and durability of structures.