Plastic Covers for Steel Fence Posts
for
Royco Inc.
Route 1 Box 3380
Dora MO 65637

Summary
(click on numbers for details)
Geometry Information Sample with
extra ribs		 Sample without
extra ribs
Cross-Sectional Area 1.026 in2 0.869 in2
Effective Cross-Sectional Area 0.880 in2 0.723 in2
Centroid Location Relative to Center of Circle X 0.000 in
Y 0.050 in		 X 0.000 in
Y 0.155 in
Moment of Inertia About Centroid X 0.509 in4
Y 0.393 in4		 X 0.412 in4
Y 0.388 in4

Mechanical Property

 70 oF -20 oF 70 oF -15 oF
Rockwell Hardness R93 R112 R101 R114
Flexure Modulus 370 ksi   260 ksi  
Compression Modulus 330 ksi 550 ksi 275 ksi 420 ksi
Compressive Strength 4.7 ksi 6.7 ksi 4.6 ksi 5.7 ksi
Axial Compression Load (6") 4500 lbs 6500 lbs 4000 lbs 5000 lbs
Lateral Compression Load (3") 75 lbs 100 lbs 65 lbs 75 lbs