Did a search, can't find it

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Hey all, I know that quite awhile back, someone posted the formula for calculating the weight of a chunk of steel based on its dimensions, I couldn't find it.  Does anyone know this formula?
Reply:found this for ya hope it helps ya it did for meThe following shape formulas can be used to calculate the nominal weights for various carbon steel shapes. These weight calculations are based upon the theoretical weight of steel at 40.80 pounds per square foot per one inch of thickness. These weight formulas are for nominal weights, (and are approximations), and should not be considered an exact weight. All dimensions are to be in inches.Rounds = Diameter squared x 2.67 = Weight in pounds per Linear Foot. Squares = Diameter squared x 3.4 = Weight in pounds per Linear Foot. Hexagons* = Diameter squared x 2.945 = Weight in pounds per Linear Foot. Octagons* = Diameter squared x 2.817 = Weight in pounds per Linear Foot. Plates, Sheets & Flats = Thickness x Width x 3.45 = Weight in pounds per Linear Foot. Plate Circles = Diameter squared x thickness x .2225 = Weight per Circle. Round Tubing = 10.68 x (O.D. – W.T.) x W.T. Square Tubing = 13.6 x (O.D. – W.T.) x W.T. Rectangular Tubing = 13.6 x [(SL + SS) – W.T.] x W.T. * Diameter is measured across the flats.O.D. = Outside DiameterW.T. = Wall ThicknessSL = Long SideSS = Short SideBuild It       Run ItBreak ItFix ItREPEAT
Reply:If you pm me with your email address, I can email you some .pdf files with weights per foot of various sizes of structural members (I/H-beam, c-channel, etc), pipe and tube.  I'm about to head out the door now but I can get that info for you later today.MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:For 'simple' shapes, just figure out the volume of steel in the chunk.  Then multiply by the density of steel of 0.283 lbs/in3.Example: a steel plate (welding table top maybe ) 3 ft by 5 ft by 3/4 inch thick3 ft x 12 in/ft x 5 ft x 12 in/ft x 0.75 in = 1620 in31620 in3 x 0.283 lb/in3 = 458.5 lbDesertRider33, post up the PDF's here.  I'm sure someone will find them useful.  The best laid schemes ... Gang oft agley ...
Reply:I always remember the densities from high school chemistry, in g/cm^3, so I have toconvert to Imperial for actual inch-based measurements, since I hate the metric system.These are easy to remember:Iron/Steel 7.9 g/cm^3Al            2.7 g/cm^3Lead      11.4 g/cm^3Gold      19.3 g/cm^3Also 1 inch = 2.54 cm (exactly).
Reply:Steel weighs 495 lbs /cu ft     1728 cu/in = 1 cu/ft, so then 1 cu/in wiehgs .286 lbsI missed moonrises post.
Reply:Cant go past this spread sheet.Just put in which size.Will give it for Steel. ally, copper , stainless.A great tool.http://www.atlasmetals.com.au/Weight...tion_Table.aspA good guess is better than a bad measurement
Reply:Originally Posted by MoonRiseFor 'simple' shapes, just figure out the volume of steel in the chunk.  Then multiply by the density of steel of 0.283 lbs/in3.Example: a steel plate (welding table top maybe ) 3 ft by 5 ft by 3/4 inch thick3 ft x 12 in/ft x 5 ft x 12 in/ft x 0.75 in = 1620 in31620 in3 x 0.283 lb/in3 = 458.5 lbDesertRider33, post up the PDF's here.  I'm sure someone will find them useful.
Reply:Use the "Go Advanced" button down in the "Quick Reply" area, then you just attach the PDF the same way you attach a jpeg.  Same file size limit too, 150K.  The best laid schemes ... Gang oft agley ...
Reply:I found the website-http://www.saginawpipe.com/product_charts.htmMM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:Thanks guys I appreciate all the helpful replies
Reply:Simplest rule to remember: 1" plate is 40lb/sq ft. Not too hard to convert most things to sq feet of 1" plate. Real handy in the field.