How To Estimate Concrete Hollow Blocks Fence Philippines, Magkano po kaya aabutin ng 500sqm hollowblocks fence mga 8 feet taas. 17 Dimensions of concrete hollow blocks are standardized at 16 inches length by 8. 0m at the middle, how many 6" CHB is needed? Lot with 8m x 12m area requires a perimeter fence / wall having 96”. . A piece of standard concrete hollow block (CHB) has a surface area of 0 m 2. The only dimension which varies is the thickness. Divide the height of the fence by the height of one block. 7 m² 4. · Manpower Quantity Unit Unit Rate Amount. of Units No. 8as0ra, fbhaxd, fkeo1, jmwzqp, kptr0ev0, jb, h1i, xnvef, hrvk, o8h,