CONTOH PERHITUNGAN PERSENTASE ∑( 1 + 4) KERUSAKAN ∗ 100% BALOK ∑( 1, 2, 3, 4, 5, 6, 7, 8) B1 = Rusak Berat B4 = Rusak Sedang ∑(0.8 + 0.6) = ∗ 100% 8 = 17.5% 19