Section 27-233. Abbreviations

bhp: brake horsepower          mph: miles per hour
  Btu: british thermal unit      oz.: ounce
  C: centigrade                  P.C.E.: pyrometric cone
  cfm: cubic feet per minute       equivalent
  cps: cycles per second         pcf: pounds per cubic foot
  cu. ft.: cubic feet            plf: pounds per linear foot
  db: decibel                    psf: pounds per square foot
  dia.: diameter                 psi: pounds per square inch
  F: fahrenheit                  psia: pounds per square inch
  fpm: feet per minute             absolute
  fps: feet per second           psig: pounds per square inch
  fsp: fire standpipe              gauge
  ft.: foot                      rpm: revolutions per minute
  gal.: gallon                   sec: second
  gpm: gallons per minute        swp: steam working pressure
  gps: gallons per second        sq. ft: square foot
  h.p.: horsepower               sq. in.: square inch
  hr.: hour                      sq. yd.: square yard
  in.: inch                      STC: sound transmission class
  INR: impact noise rating       Tag: tagliabue
  I.P.S.: iron pipe size         wwp: water working pressure
  lb.: pound
    Note:  For  abbreviation of name of referenced national organizations,
  see reference standard RS 2-1.