NCIDQ IDFX Practice Exam

What advantage do waffle slabs provide in terms of loading capacity?

1. Lower material costs

2. Support for heavier loads at longer spans

3. More insulation compared to flat slabs

4. Increased aesthetic appeal in visible areas

The correct answer is: Support for heavier loads at longer spans

Waffle slabs are designed with a grid pattern of ribs that provide significant structural advantages, particularly in terms of loading capacity. This design allows them to effectively distribute loads across a larger area, making them an excellent choice for supporting heavier loads at longer spans compared to flat slabs. The unique configuration of the ribs enhances the flexural strength of the slab, allowing it to handle increased loads without requiring excessive thickness or material. This capability is especially beneficial in commercial and industrial applications where large, open spaces are needed without the interruption of numerous columns or supports. In contrast, other options like lower material costs, insulation properties, and aesthetic appeal do not directly pertain to the primary structural benefit that waffle slabs offer in terms of their ability to carry and support considerable loads.