USEFUL DATA |

To find circumference of a circle, multiply diameter by 3.1416. |

To find diameter of a circle, multiply circumference by .31831. |

To find area of a circle, multiply square of diameter by .7854 |

Area of a rectangle = length multiplied by breadth. Doubling the diameter of a circle increases its area four times. |

To find area of a triangle, multiply base by ½ perpendicular height. |

Area of ellipse = product of both diameters times .7854. |

Area of parallelogram = base times altitude. |

To find side of an inscribed square, multiply diameter by 0.7071 or multiply circumference by 0.2251 or divide circumference by 4.4428. |

Side of inscribed cube = radius of sphere times 1.1547. |

To find side of an equal square, multiply diameter by .8862 Squared. A side multiplied by 1.4142 equals diameter of its circumscribing circle. |

A side multiplied by 4.443 equals circumference of its circumscribing circle. |

A side multiplied by 1.128 equals diameter of an equal circle. |

A side multiplied by 3.547 equals circumference of an equal circle. |

To find cubic inches in a ball, multiply cube of diameter by .5236. |

To find cubic contents of a cone, multiply area of base by 1/3 the altitude. |

Surface of frustrum of cone or pyramid = sum of circumference of both ends times ½ slant height plus area of both ends. |

Contents of frustrum of cone or pyramid = multiply area of two ends and get square root. Add the 2 areas and multiply 1/3 altitude. |

Doubling the diameter of a pipe increases its capacity four times. |

A gallon of water (U.S. standard) weighs 8-1/3 lbs. and contains 231 cubic inches. |

A cubic foot of water contains 7-1/2 gallons, 1728 cubic inches, and weighs 62-1/2 lbs. |

To find the pressure in pounds per square inch of a column of water, multiply the height of the column in feet by .434. |

To find capacity of tanks any size, given dimensions of a cylinder in inches, to find its capacity in U.S. gallons: square the diameter, multiply by the length and by .0034. |

# Useful Data

## References

- A.I.S.C. Hot-Rolled Structural Steel Shape Designations
- AISI / SAE Steel Compositions
- AISI System if Identification
- Angles Structural Steel
- Approximate Minimum Mechanical Properties of Some Steels
- Average Mechanical Properties
- Carbon Grating General
- Carbon Steel Bars
- Cardinal Metals, Inc.
- Channels
- Chemical Properties
- Circumference / Area of Circles o 50″
- Circumference / Area of Circles to 120
- Cold Finish Flat Bar
- Cold Round Bar
- Conditions of Sale
- Contact
- Converting Inches to Decimals of a Foot
- Decimal Equivalents
- English to Metric Conversion Table
- Floor Plate
- Floor Plate
- Fractional Equivalents
- Galvanized Sheets
- Grating and Flooring
- Hardness Conversion Table
- Hot Rolled Flat Bar
- Hot Rolled Rounds and Squares
- Hot-Cold Sheets
- Metric Measurement and Converison
- Metric to English Conversion Table
- Mill Edge Hot Rolled Strip
- News
- Parts
- Parts List
- Pipes and Tubing
- Plate
- Plate Stock Sizes
- Plate Typical Properties
- Rectangle Structural Steel Tubing
- Round Bar
- Seamless and Welded Pipe Weight and Dimension
- Sheet and Coil
- Sheet Products
- Sheet Thickness
- Square Structural Tubing
- Steel Terminology
- Structural Steel
- Summary of Specs
- Tank Volume
- Tees-Zees and Rails Structural Steel Shapes
- Tolerances 1010 Tubing
- Universal Mill Edge Plate
- Useful Data
- Weight Formulas
- Welded and Seamless Pipe
- Wide Flange Beams