XII. Say whether these statements are true or false. Correct the false statements.

1. Rod materials can be used for both dividing space and supporting the building.

2. Concrete is used as a block material, a sheet material and a rod material.

3. Steel is used for frame constructions because it has a property of high tensile strength and low compressive strength.

4. The sheet materials, which act as space dividers in a frame building are light because they do not support structural loads.

5. Mass construction buildings are light whereas planar constructions are heavy.