The correct answer is C. 12.
A cantilever slab is a slab that projects beyond its supporting walls or columns. The maximum ratio of span to depth of a cantilever slab is 12. This means that the length of the slab can be no more than 12 times its thickness.
The maximum ratio of span to depth is limited by the need to ensure that the slab is strong enough to support its own weight and the weight of any loads that are placed on it. If the span is too large, the slab will be too weak and will be likely to collapse.
The maximum ratio of span to depth is also limited by the need to ensure that the slab is stiff enough to prevent deflection. If the span is too large, the slab will deflect too much, which can cause problems such as cracking and water damage.
The maximum ratio of span to depth is typically specified in building codes. In the United States, the International Residential Code (IRC) specifies that the maximum ratio of span to depth for cantilever slabs is 12.
The following are the brief explanations of each option:
- Option A: 8. This is not a valid option because the maximum ratio of span to depth of a cantilever slab is 12.
- Option B: 10. This is not a valid option because the maximum ratio of span to depth of a cantilever slab is 12.
- Option C: 12. This is the correct option because the maximum ratio of span to depth of a cantilever slab is 12.
- Option D: 16. This is not a valid option because the maximum ratio of span to depth of a cantilever slab is 12.