Explanation:

In civil engineering, beams are structural elements that are used to support loads and transfer them to the foundations. Beams are subjected to various stresses such as compression, tension, bending, and shear. To ensure the structural integrity and safety of the beams, it is important to minimize these stresses. One way to achieve this is by placing one end of the beam on rollers.

Reasons to avoid temperature stresses:
- Temperature stresses can occur in beams due to thermal expansion and contraction. When a beam is subjected to temperature changes, it expands or contracts, leading to thermal stresses. These stresses can cause deformation, cracking, or failure of the beam.
- By placing one end of the beam on rollers, it allows the beam to freely expand or contract without being restrained by the supports. This helps to mitigate the temperature stresses and reduces the risk of damage to the beam.

Benefits of using rollers:
- Rollers provide a low friction surface, allowing the beam to move horizontally as it expands or contracts due to temperature changes.
- By allowing the beam to move, the rollers help to distribute the thermal stresses evenly along the length of the beam, preventing localized stress concentrations.
- The use of rollers also helps to minimize the bending moments and shear forces induced by temperature changes, reducing the overall stress on the beam.

Other stress considerations:
- While the question specifically mentions temperature stresses, it is important to note that beams can also be subjected to other types of stresses such as compressive, tensile, and shear stresses.
- The design of beams takes into account these different types of stresses, and various methods are used to mitigate them, such as reinforcing the beam with steel bars or using prestressed concrete.
- However, in the context of the question, the use of rollers specifically helps to address temperature stresses in beams.