Square feet

EPDM is by far the most widely used material in the ballasted roofing system constmction. Because of EPDM s flexibiHty, very large sheets of up to 10,000 square feet (929 m ) can be deHvered to the job site in compact roUs that offer reduced labor on the roof in the seaming process. The typical EPDM sheet size used in ballasted systems is 12 by 30 m and 1.1 mm thick. EPDM is also widely used in both the fully adhered and mechanically fastened roofing systems. In these constmctions, both 1.1- and 1.5-mm thick material is used with widths from 2.1 to 15 m. A majority of the installations use nonreinforced sheet, although reinforced membrane can also be used in all of the system types. The majority of the reinforced sheets go into mechanically fastened systems. 

Acres Square feet 43,560 B.t.u. (60 F.) per degree Fahrenheit Calories per degree centigrade 453.6... 

Square feet per hour Square meters per second 2.581 X 10 =... 

Diffusivity to convert square centimeters per second to square feet per hour, multiply by 3.8750 to convert square meters per second to square feet per hour, multiply by 38,750. 

To convert inches to milhmeters, multiply by 25.4 to convert square inches to square mdhmeters, multiply by 645 to convert feet to meters, multiply by 0.3048 to convert square feet to square meters, multiply by 0.0929 to convert pounds per foot to kilograms per meter, multiply by 1.49 to convert gallons to cubic meters, multiply by 3.7854 x 10 and to convert pounds to kilograms, multiply by 0.4536. 

To convert British thermal units per hour-square foot-degrees Fahrenheit to joules per meter-second-kelvins, multiply hy 1.7307 to convert British thermal units per ciihic foot-degrees Fahrenheit to joules per ciihic meter-kelvins, multiply hy (6.707)(10 ) and to convert square feet per hour to square meters per second, multiply hy (2.581)(10 ). 

Common practice is to specify exchanger surface in terms of total external square feet of tubing. The effective outside heat-transfer surface is based on the length of tubes measured between the inner faces of tube sheets. In most heat exchangers there is little difference between the total and the effective surface. Significant differences are usually found in high-pressure and double-tube-sheet designs. 

FIG. 11-41 Costs of basic exchangers—all steel, TEMA Class R, 150 Ibl/in, 1958. To convert pollnds-force per square inch to Idlopascals, mllltiplyhy 6.895 to convert square feet to square meters, mllltiplyhy 0.0929 to convert inches to millimeters, multiply hy 25.4 and to convert feet to meters, multiply hy 0..3048. 

NOTE To convert feet to meters, multiply by 0.3048 to convert square feet to square meters, multiply by 0.0929 and to convert inches to millimeters, multiply by 25.4. 

FIG. 14-67 Effective interfacial area based on data of Fellinger. (a) 1-in Raschig rings, (h) 1-in Berl saddles. To convert square feet per cubic foot to square meters per cubic meter, multiply by, 3.28 to convert pounds per hour-square foot to kilograms per second-square meter, multiply by 0.001,356. [Shul-man. Am. Inst. Chem. Eng. J., i, 2,57 (I,9,5,5).]... 

FIG. 14-69 Comp arisen of effective and wetted areas, 25-mm Raschig rings. To convert ciiLic feet per square foot-hoiir to ciiLic meters per square meter-second, multiply hy 8.47 X 10 to convert square feet per ciiLic foot to square meters per ciiLic meter, multiply hy 3.28. [Yoshida and Koyanagi, Am. Inst. Chem. Eng. J., 8, 30,9 (1962).]... 

FIG. 22-12 Pulsed -column capacity versus column size for 65 percent p-xylene feed. To convert gallons per hour to cubic meters per hour, multiply hy 0.9396 to convert square feet to square meters, multiply hy 0.0929. (McKay et al., prepr., 59th nat. meet. AIChE, East Columbus, Ohio.)... 

To convert pound-square feet to Idlogram-square meters, multiply by 0.0421 to convert revolutions per minute to radians per second, multiply by 0.1047 and to convert pound-force-feet to newton-meters, multiply by 1.356. 

This makes a mix with a viscosity of 5000-7000 centipoise. The total mix solids are 40% and the resin solids in the mix are 26%. A mix like this would be used on Douglas fir veneer at the rate of about 55 pounds per 1000 square feet of veneer surface (double glue line basis). The 43% solids resin would be used at about 500 cps viscosity. 

The spiral-plate exehanger is eompaet 2000 square feet of heat transfer surfaee ean be obtained in a unit 58 inches in diameter with a 72 ineh wide plate. 

In condensation of streams consisting primarily of steam, the condenser size ranges from 10, 000 to 60,000 square feet per shell (bundle), the tubes averaging 26 feet long. 

Your facility is located in a semi-arid region of the United States which has an annual precipitation (including snowfall) of 12 inches of rain. (Snowfall should be converted to the equivalent inches of rain assume one foot of snow is equivalent to one inch of rain.) The area covered by your facility is 42 acres (about 170,000 square meters or 1,829,520 square feet). The area of your facility is 50 percent unimproved area, 10 percent asphaltic streets, and 40 percent concrete pavement. 

Square feet of solar collector fabricated in 1989/square feet of solar collector fabricated in 1988. 

Models typically range from 10 to over 1000 square feet of effective flotation area for raw wastewater flows to over 1000 gallons per minute. Complete systems often include chemical treatment processes. A dissolved air... 

Single-zone systems deliver conditioned air to a single thermal zone. These systems are popular iu small buildings (fewer than 10,000 square feet) and in... 

Since the adoption of the Act in 1992, state-of-the-art energy codes have been extended to cover an additional 39 percent of residential construction and 26 percent of commercial construction. Two-thirds of new U.S. residential construction (1 million homes annually) fall under federal, state, and local energy codes that meet or exceed the 1995 version of the Model Energy Code (MEC). An additional 975 million square feet of commercial construction falls under codes that meet or exceed ASHRAE/IES Standard 90.1-1989. Table 4 shows the status of state residential code adoption as of August 1999. 

A3 = exposed surface area of the vessel, in square feet. 

Wetted Area" (square feet) Venting Requirement (cubic feet of free air " per hour) Wetted Area" (square feet) Venting Requirement (cubic feet of free air per hour)... 

A = wetted surface area, in square feet (see Table 3, Footnote a). 

---