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CONVERSION OF UNITS
CHAPTER 2 DRAFTING  EQUIPMENT

Engineering Aid 3 - Beginning Structural engineering guide book
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To convert (for example) 7 3/8 in. carpenter’s measure  to  engineer’s  measure,  you  have  the following: For a great many types of conversions there are tables in which you can find the desired values by  inspection.  Various  publications  contain  tables for  making  the  following  conversions: Meters to feet Feet to meters Degrees Centigrade to degrees Fahrenheit Degrees Fahrenheit to degrees Centigrade Inches  and  sixteenths  to  decimals  of  a  foot Sixteenths  of  an  inch  to  decimals  of  a  foot Minutes  to  decimals  of  a  degree Degrees to roils and roils to degrees Grads  to  degrees,  minutes,  and  seconds A  conversion  factor  is  a  number  that,  if multiplied   by   a   value   expressed   in   terms   of one  unit,  will  produce  the  equivalent  value  ex- pressed  in  terms  of  a  different  unit.  The  factor  for converting  linear  feet  to  miles,  for  instance,  is 0.00019. If you multiply 5,280 ft by 0.00019, you get 1.0032 miles, which is close enough to a mile to  satisfy  most  practical  purposes. When  you  know  the  ratio  between  two different  units,  you  can  easily  work  out  your conversion  factor.  For  example,  you  know  that the ratio of degrees to roils is The  conversiom  factor  for  converting  degrees  to roils is the number of roils in 1 degree, which is The conversion factor converting roils to degrees is  the  number  of  degrees  in  a  roil,  which  is Some  of  the  common  conversion  factors  are as  follows  : Linear feet x 0.00019 Linear yards x 0.0006 Square inches x 0.007 Square feet x 0.111 Square yards x 0.0002067 Acres  x  4840.0 Cubic  inches  x  0.00058 Cubic  feet  x  0.03704 =  miles =  miles =  square  feet =  square  yards =  acres =  square  yards =  cubic  feet =  cubic  yards 1-35







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