Concrete Bollard Common Issues — Symptoms, Diagnosis, and Solutions
Most bollard problems are visible before they become structural failures. Here is the diagnostic table facility directors need to stay ahead of issues.
Issue: Corrosion at the Concrete Collar (Base)
Symptom: Orange-brown staining on the concrete collar at grade, rust streaks on the pipe surface near the slab. Diagnosis: Water is pooling at the bollard base—either from inadequate slope of the surrounding slab, or from a gap between the concrete collar and the pipe that channels surface water downward. The water sits in contact with the steel pipe below the powder-coat and initiates oxidation. In Utah's freeze-thaw climate, this water freezes, expands, and progressively spalls the concrete collar. Solution: Correct the drainage problem first. If the surrounding slab slopes toward the bollard rather than away, a concrete overlay or grading adjustment prevents re-accumulation. Clean the rusted area with a wire brush and angle grinder to bare metal. Apply cold-galvanizing compound (zinc-rich primer) to the bare steel. Re-apply DTM primer and two finish coats of traffic enamel. Seal the pipe-to-concrete gap with a polyurethane sealant (not silicone—silicone cannot be painted over). Inspect annually thereafter.
Issue: Powder-Coat Chipping and Fading
Symptom: Paint chipping in patches, particularly at the impact zone (30 to 45 inches above grade where vehicle bumpers typically contact), or uniform color fading across the entire bollard surface. Diagnosis: Impact chipping is mechanical—the bollard is doing its job. Fading is UV degradation; Utah's high-altitude UV exposure at 4,500 feet accelerates coating oxidation relative to lower-elevation climates. Solution for impact chipping: assess whether bare steel is exposed. If yes, touch up within 30 days with DTM primer and a DOT-grade traffic enamel match coat. A bollard with unprotected bare steel will rust visibly within one Utah winter. Solution for UV fading: the coating has reached end of service life. Full pipe surface preparation (clean, degrease, scuff-sand), DTM primer, and two coats of traffic enamel restore appearance and protection for another 5 to 8 years.
Issue: Removable Bollard Binding in Sleeve
Symptom: Removable bollard difficult or impossible to remove from the sleeve; locking mechanism does not engage or disengage smoothly. Diagnosis: Three common causes. (1) Sleeve drain hole is blocked—water accumulated in the sleeve, froze, and locked the bollard in ice. Remove the bollard with gentle rocking (do not force with mechanical leverage—this bends the lower shaft) after warming the sleeve with hot water. Clear and confirm drain hole is open. (2) Sleeve interior has corroded and the bollard shaft is binding on rust. Remove bollard, clean sleeve interior with a wire brush and penetrating oil, and apply corrosion inhibitor to both sleeve interior and bollard shaft. (3) The locking mechanism (key cylinder or padlock) has corroded or the key is worn. Replace the lock cylinder or padlock. Solution for recurring binding: apply a thin film of lanolin-based metal protector (not petroleum grease, which attracts dirt) to the bollard shaft annually and confirm drain hole is open at each inspection.
Issue: Bollard Out of Plumb After Impact or Winter
Symptom: Bollard is visibly tilted from vertical, or noticeably shifted from its installed position. Diagnosis: Three scenarios. (1) Vehicle impact has bent the pipe above grade—the concrete footing is intact and the pipe is bent at the strike point. This is repairable by removing the above-grade section and welding on a new pipe section if the below-grade pipe and footing are undamaged. In practice, replacement of the full bollard is often more cost-effective. (2) Vehicle impact has displaced the concrete footing—the entire assembly has shifted. This requires removal of the bollard assembly, repair of the concrete slab and sub-base, and re-installation. (3) Frost heave has lifted the footing—occurs in bollards installed in poorly compacted sub-base or in areas with recurring water saturation. Solution: in all three cases, contact us for an assessment before attempting to straighten the bollard. A plumb-corrected bollard with an undiscovered footing failure will shift again under the next traffic load.
Recent Concrete Bollards Projects
Common Questions
- How quickly does surface rust progress to structural failure on a bollard pipe?
- Surface rust (orange staining on the coating surface without exposed bare metal) is cosmetic and does not indicate structural compromise. Bare metal rust (coating has chipped off, orange-brown rust directly on the steel pipe) will progress in Utah's climate over 2 to 3 years to pitting corrosion that reduces pipe wall thickness. At 25 to 30 percent wall thickness loss, the pipe's impact resistance is measurably compromised. Annual inspection and spot-touch-up of any bare-metal exposure prevents this progression.
- Can a bent bollard be straightened in place?
- Not safely. Hydraulic straightening of a steel pipe embedded in concrete applies asymmetric loads to the footing that can crack the concrete collar without visible indication. A straightened bollard may look correct but have an invisible crack in the footing that will allow displacement on the next impact. Replacement is the correct answer for a bent embedded bollard.
- What does it mean if a bollard rings hollow when struck?
- A properly installed bollard filled with 4,000 PSI concrete should produce a solid thud when struck. A hollow ring indicates the concrete fill has settled away from the pipe interior, leaving a void. This reduces the bollard's impact resistance significantly—the pipe alone without concrete backing will deform at a much lower energy level. Drill a 1/2-inch inspection hole at mid-height to confirm; if hollow, inject with non-shrink grout.
Ready to Get Started?
Get a free, itemized estimate for your commercial concrete bollards project. We typically schedule site visits within 48 hours and deliver written quotes the next business day.
Get In Touch
Ready for a quote or have a question? We’re Utah-based, Utah-run, and we’ll come out to your property for a free on-site estimate.
Get A Free Quote