For a ribbed slab (ribbed span), the minimum thickness of the ribs and the minimum thickness of the in-situ topping are typically:
Rib width (thickness): 65 mm In-situ topping thickness: 54 mm
✅ Correct answer: 65 mm & 54 mm
The trap in this question is that many people reverse the values. In practice, the rib must be thicker than the topping because it acts as the primary load-carrying beam element.
Rib width (thickness): 65 mm
In-situ topping thickness: 54 mm
✅ Correct answer: 65 mm & 54 mm
The trap in this question is that many people reverse the values. In practice, the rib must be thicker than the topping because it acts as the primary load-carrying beam element.