What diameter should steel bollards for vehicle protection have?

What diameter should steel bollards for vehicle protection have?

• A. 3 inches
• B. 5 inches
• C. 4 inches
• D. 6 inches

Answer: (C)

Protective bollards need a diameter that provides enough strength to resist vehicle impact without being wasteful or hard to install. A moderate, standard size hits that balance: it has enough cross-section to stay upright and distribute force during a collision, while avoiding the extra weight, cost, and installation effort that come with larger diameters. If the bollard is too small, it can bend or fail under impact, undermining protection. If it’s larger than necessary, you pay more for material and labor with little additional benefit for typical protection scenarios. For vehicle protection around propane tanks and similar equipment, using that standard, balanced size is the practical choice, providing reliable protection at a reasonable cost.

Protective bollards need a diameter that provides enough strength to resist vehicle impact without being wasteful or hard to install. A moderate, standard size hits that balance: it has enough cross-section to stay upright and distribute force during a collision, while avoiding the extra weight, cost, and installation effort that come with larger diameters. If the bollard is too small, it can bend or fail under impact, undermining protection. If it’s larger than necessary, you pay more for material and labor with little additional benefit for typical protection scenarios. For vehicle protection around propane tanks and similar equipment, using that standard, balanced size is the practical choice, providing reliable protection at a reasonable cost.