AECT250-Lecture 41

AECT250-Lecture 41 - Lecture 41 Metric Metric units are...

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Lecture 41 - Page 1 of 11 Lecture 41 – Metric Metric units are used everywhere in the world EXCEPT the USA. It is based on scientific measurements, not the length of a king’s foot or the weight of a chicken. Metric Conversion Factors Multiply: By: To Obtain: inches 25.4 millimeters (mm) inches 0.0254 meters (m) feet 304.8 millimeters (mm) feet 304.8 meters (m) Length yards 0.9144 meters (m) in 2 645.2 mm 2 ft 2 92,909 mm 2 ft 2 0.0929 m 2 Area yd 2 0.836 m 2 in 3 16,387 mm 3 ft 3 28,317,000 mm 3 ft 3 0.0283 m 3 gallons 0.003785 m 3 = 1000 liters Volume gallons 3.785 liters Weight pounds 0.454 kilograms (kg) pounds 4.448 Newtons (N) kips 4448 Newtons (N) Force pounds per foot (PLF) 14.594 Newtons per meter (N/m) Lb-In 0.11299 N-m Lb-Ft 1.3559 N-m Kip-Ft 1355.9 N-m Kip-Ft 1.3559 kN-m Moment Kip-In 112.99 N-m Unit weight Lb per ft 3 (PCF) 0.1571 kN/m 3 Lb per in 2 (PSI) 6895 Pascals = Pa = N/m 2 Lb per in 2 (PSI) 6.895 kPa = kilopascals = 1000 Pa Lb per in 2 (PSI) 0.0006895 mPa = megapascals = N/mm 2 Kips per in 2 (KSI) 6895 kPa Kips per in 2 (KSI) 6.895 mPa Lb per ft 2 (PSF) 47.88 Pa Lb per ft 2 (PSF) 0.04788 kPa Kips per ft 2 (KSF) 47.88 kPa Stress (pressure) Kips per ft 2 (KSF) 0.04788 mPa
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Lecture 41 - Page 2 of 11 Example 1 GIVEN : All road construction projects in New York State have drawings with metric measurements. All metric drawings always use units of mm for everything. (Reminder: 1 m = 1000 mm) REQUIRED : Convert 1500 mm as shown on the drawings into feet/inch/sixteenths. Use the conversion 1 inch = 25.4 mm Number of inches = inch per mm mm _ _ 4 . 25 1500 = 59.055118 inches = 48” + 11.055118” = 4’ + 11.055118” = 4’ + 11” + (0.055118 x 16 th ) = 4’ + 11” + ths 16 88 . 0
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AECT250-Lecture 41 - Lecture 41 Metric Metric units are...

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