The line loads of Bollards can be influenced by numerous factors including vessel size, wind conditions, current conditions, passing vessels, elasticity of the Bollards lines, vessel deck equipment, tidal levels, Bollards spacing, and numerous other factors.

Materials for Bollards are typically manufactured using the sand casting methods with the materials of choice being either steel or ductile iron.

Cast steel for Bollards are available in a wide range of strengths. This allows the Bollards  to be commercially competitive versus thicker cast iron Bollards .

Ductile Iron Bollards  is more corrosion resistant than Steel Bollards  and can tolerate compromised coatings better than steel Bollards .