✅How To Calculate The Concrete Volume Of A Retaining Wall 📌Stem Height of Stem= H = 5 m Top Width of The Stem= W1 = 0.25 m Bottom Width of The Stem= W2 = 0.50m Length of The Stem= L = 7 m 📌The Concrete Volume Of The Stem = [L x {( w1 w2) ÷ 2} x h] = [7 x {( 0.25 0.5) ÷ 2} x 5] = [7 x {0.75 ÷ 2} x 5] = [7 x 0.375 x 5] = 13.125 Cum 📌Base Slab Width Of The Base Slab = W = 4m Thickness Of Base Slab = T = 0.4m Length Of Base Slab = L = 7m 📌Calculation The Concrete Volume Of Base Slab = L x W x T