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"Q=Quenched & Tempered" steel used in decking materials that requires a higher load strength. I believe the term has been degraded to refer to the Robertson System of "Q"- Decking, but I could be wrong. Larry Williams Project Analyst Dynamic Industries, Inc. New Iberia, La.
2" x 4"
There is no way to determine weight of random dimensions. The weight of 3.5 meters of thread is going to be vastly different than 3.5 meters of steel rod.
This depends on what type of steel. The density of carbon steel (one of the most common types of steel) is 7.85g/cm3Density = m/vradius of rod = 3.25mm (radius is 1/2 of diameter)3.25mm = .325 cm1 meter = 100cmvolume of cylinder = (pi)(radius)^2(h) = 33.18Density * Volume = mass7.85 * 33.18 = 260.46260.46 grams
The volume is 150.152 cm3. The density of steel varies according to the constituents but is normally between 7.75 and 8.05 grams per cm3. Using g = 9.8, this range would give a weight in the range 11.4-11.8 Newtons.