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• board foot formula -✓✓T x W x L / 12
-T = the thickness of the board in inches
-W = the width of the
board in inches
-L = the length of the board in feet.
• Board foot example:
how many board feet are in a 16 foot long
piece of 2 x 8 lumber? -✓✓2 x 8 x = 21.33 board feet
• 18'-8"= ?' -✓✓18.667'
• Converting to decimal feet -✓✓X"/12
• Area of a circle -✓✓A=πr²
• Drilled Hole Volume per foot -✓✓-Diam.=CF
-12" 0.785
-14" 1.069
-16" 1.396
-18" 1.767
-20" 2.182
• #3 Reinforcing Bar= ? LF -✓✓0.376
• #4 Reinforcing Bar= ? LF -✓✓0.668
• #5 Reinforcing Bar= ? LF -✓✓1.043