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WQA Technical Fact Sheet Flow Considerations Empty Bed Contact Time (EBCT), represents the hydraulic flow rate through a GAC bed and is usually reported in “minutes”. Simply put, it is the volume of media (in gallons, m3, ft3) divided by the flow volume (in gallons, m3, ft3) per unit of time (minutes, hours). A one cubic ft GAC filter is 7.5 Foam densities range from approximately 2 to 60 lbs. per cubic foot (48 to 961 kg/m 3). Unlike thermoplastic foams (PVC, SAN,), the unit cost of polyurethane foam increases in a linear fashion with density, so a 20-lbs.-per-cubic foot polyurethane foam will be approximate twice the cost of a 10-lb. foam. Example 1 found that 153 cubic feet of solid green wood are needed per ton of bleached Douglas-fir kraft pulp. Assuming a cord contains 80 cubic feet of solid wood (Chapter 3), this is equivalent to 1.91 cords/ton. Example 4 How many cubic feet of gravity-packed western hemlock chips are needed to produce one short ton *Manure density (weight per cubic foot) varies with moisture content, primarily depending on amount of bedding. For a more accurate estimate, weigh a five-gallon pail of manure, then multiply the weight by 1.5 to get the density in pounds per cubic foot b) Measured volume of spreader Measure and calculate volume of spreader in cubic feet ... If it’s being shipped via ground service, however, generally it is only subject to dim weight if the cubic size of the package is 3 cubic feet or larger (5,184 cubic inches). If the cubic size is less than 3 cubic feet, dimensional weight will not apply, and the actual weight of the package will always be used. I know, a little confusing, right? 5.5 million cubic yards or 1.3% of landfilled MSW in 1997. Density: Landfilled glass bottles weigh 2,800 pounds per cubic yard (lbs./cu. yd.). Loose glass bottles weigh 600 lbs./cu. yd. While mix design and production technique can affect GFRC weight, a typical GFRC mix design will be 125-130 lbs per cubic foot. This equates to 7-8 lbs/ft2 at ¾” thick and 10-11 lbs/ft2 at 1” thick. Panelized GFRC, incorporating a steel stud frame, can weigh 10-25 lbs/ft2, depending on frame configuration.