Table 5-4. CONVERSION FACTORS FOR MATERIALS OTHER THAN REINFORCED CONCRETE MATERIAL CONVERSION FACTOR • EARTH 0.1 • ORDINARY MASONRY • HARD PAN • SHALE • ORDINARY CONCRETE • ROCK • GOOD TIMBER • EARTH CONSTRUCTION 0.5 • DENSE CONCRETE • FIRST-CLASS MASONRY 0.7 Table 5-5. MATERIAL FACTOR (K) FOR BREACHING CHARGES Material R K Earth All values 0.07 Poor masonry, shale, hardpan, good timber, and earthen construction Less than 1.5 m (5 ft) 1.5 m (5 ft) or more 0.32 0.29 Good masonry, concrete block, and rock 0.3 m (1 ft) or less Over 0.3 m (1 ft) to less than 0.9 m (3 ft) 0.9 m (3 ft) to less than 1.5 m (5 ft) 1.5 M (5 ft) to less than 2.1 m (7 ft) 2.1 m (7 ft) or more 0.88 0.48 0.40 0.32 0.27 Dense concrete and first-class masonry 0.3 m (1 ft) or less Over 0.3 m (1 ft) to less than 0.9 m (3 ft) 0.9 m (3 ft) to less than 1.5 m (5 ft) 1.5 M (5 ft) to less than 2.1 m (7 ft) 2.1 m (7 ft) or more 1.14 0.62 0.52 0.41 0.35 Reinforced concrete (factor does not consider cutting steel) 0.3 m (1 ft) or less Over 0.3 m (1 ft) to less than 0.9 m (3 ft) 0.9 m (3 ft) to less than 1.5 m (5 ft) 1.5 M (5 ft) to less than 2.1 m (7 ft) 2.1 m (7 ft) or more 1.76 0.96 0.80 0.63 0.54