... Total cost LiFormwork $50,400 $7,560 $57,960 $2, 319 $60 ,27 9Rebars 4,400 660 5,060 20 2 5 ,26 2Concrete 33,500 5, 025 38, 525 1,541 40,066Total $88,300 $13 ,24 5 $101,545 $4,0 62 $105,607Example ... Construction - Buildings 28 44 61 83 98 1 02 105 109 1 12 117 122 ENR - Buildings 28 44 68.5 85.7 95.4 105.7 109.8 109.8 113 118.7 119.7US Census - Composite 28 44 68.6 82. 9 98.5 103.7 108 1 12. 5 ... That is: for a 4 ft layer with 20 % voids, grouting cost = $1,1 52, 000 to $2, 880,000 for a 4 ft layer with 30% voids, grouting cost = $1, 728 ,000 to $4, 320 ,000 for a 6 ft layer with 20 % voids,...