文档介绍：CONVERSIONS BETWEEN . CUSTOMARY UNITS AND SI UNITS (Continued)
Times conversion factor
. Customary unit Equals SI unit
Accurate Practical
Moment of inertia (area)
inch to fourth power 416,231 416,000 millimeter to fourth
power mm4
inch to fourth power ϫ 10Ϫ6 ϫ 10Ϫ6 meter to fourth power m4
Moment of inertia (mass)
slug foot squared slug-ft2 kilogram meter squared kg·m2
Power
foot-pound per second ft-lb/s watt (J/s or N·m/s) W
foot-pound per minute ft-lb/min watt W
horsepower (550 ft-lb/s) hp 746 watt W
Pressure; stress
pound per square foot psf pascal (N/m2)Pa
pound per square inch psi 6890 pascal Pa
kip per square foot ksf kilopascal kPa
kip per square inch ksi megapascal MPa
Section modulus
inch to third power 16, 16,400 millimeter to third power mm3
inch to third power ϫ 10Ϫ6 ϫ 10Ϫ6 meter to third power m3
Velocity (linear)
foot per second ft/s * meter per second m/s
inch per second in./s * meter per second m/s
mile per hour mph * meter per second m/s
mile per hour mph * kilometer per hour km/h
Volume
cubic foot ft3 cubic meter m3
cubic inch ϫ 10Ϫ6 ϫ 10Ϫ6 cubic meter m3
cubic inch cubic centimeter (cc) cm3
gallon (231 ) gal. liter L
gallon (231 ) gal. cubic meter m3
*An asterisk denotes an exact conversion factor
Note: To convert from SI units to USCS units, divide by the conversion factor
5
Temperature Conversion Formulas T(°C) ϭᎏᎏ[T(°F) Ϫ 32] ϭ T(K) Ϫ
9
5
T(K) ϭᎏᎏ[T(°F) Ϫ 32] ϩ ϭ T(°C) ϩ
9
9 9
T(°F) ϭᎏᎏT(°C) ϩ 32 ϭᎏᎏT(K) Ϫ
5 5
This page intentionally left blank
Structural Analysis
Fourth Edition, SI
Aslam Kassimali
Southern Illinois University—Carbo