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  12)  Mild steel bars in either direction in RCC slabs should not be less than -------- of total cross-sectional area ans - 0.15 % Concept In RCC slabs, mild steel reinforcement in either direction should not be less than 0.15% of the total cross-sectional area.  Here's a more detailed explanation:  Minimum Reinforcement: As per IS 456:2000, the minimum reinforcement in either direction of a slab using mild steel should not be less than 0.15% of the total cross-sectional area. HYSD Bars: If high-strength deformed bars (HYSD) are used, the minimum reinforcement in either direction should not be less than 0.12% of the total cross-sectional area. IS 456:2000: These guidelines are based on the Indian Standard code IS 456:2000, which provides detailed recommendations for the design and detailing of reinforced concrete structures.

  1)  As per the code IS-456, for controlling the vertical deflection of continuous two-way slabs with Fe415 grade HYSD steel reinforcement bars, the maximum value of the span to overall depth ratio should be -------------  ans- 26 .