Footing ke liye cement kaise calculate karein (foundation)
Strip ya pad footing ke liye cement bags, reti, aggregate — step-by-step M20 example aur ₹ material cost।
Footing kai ghar builds ki pehli structural concrete order hoti hai — zameen mein rectangle, par grade aur depth drawing se aati hai.
Kya measure karein
Har strip ya pad footing:
- Lambai — deewar line ya column grid ke saath
- Chaudai — aksar 600–900 mm residential
- Gehraai — khudai ke bottom se footing top (300–500 mm common)
Irregular layout ko kai rectangles mein todo, volumes jodo.
Step 1 — Wet volume
Wet volume = L × W × D
Example: 6 m strip, 0.6 m wide, 0.45 m deep
6 × 0.6 × 0.45 = 1.62 m³ (~57 cft)
Step 2 — Dry × 1.54
1.62 × 1.54 = 2.49 m³ dry
Step 3 — Grade split
Residential RCC footings par M20/M25 common. M20 par is example mein ~13 bags (50 kg) + reti/aggregate cft.
Grade drawing se confirm — yahan downgrade mat karein。
Step 4 — Material cost
Cost ≈ (bags × ₹/bag) + ((reti + aggregate) cft × ₹/cft)
13 bags @ ₹400, ~120 cft @ ₹55 → lagbhag ₹11,800 materials only is run ke liye。
Steel, shuttering, khudai, mazdoori alag。
Kai footings
Har run alag ya volumes pehle jodo phir ek baar 1.54 aur ratio lagao。
FAQ
Footing vs plinth beam?
Solid rectangle model — beam bhi L × W × D enter karo. Stepped footings ko boxes mein todo.
Neeche M15 PCC?
Alag pour aksar — M15/PCC guide dekhein。
Slab calculator se farq?
Same math, alag defaults। Footing Calculator foundation ke liye M10–M30।