Post-Event and Post-Storm Inspection Protocols

The annual inspection establishes a baseline condition for the bleacher structure and identifies deterioration that has developed over the preceding year. But bleacher structures face their greatest stresses during two specific events: large crowds and severe weather. A structure that was in acceptable condition at the last annual inspection can sustain significant damage during a single high-attendance event or a severe storm.

Post-event and post-storm inspections are not a substitute for the annual inspection — they are a complement to it. They catch damage when it occurs, before the next annual inspection, and before the damaged structure is used again.

Post-Event Inspections

When a Post-Event Inspection Is Warranted

Not every event requires a post-event inspection. The inspection is warranted when:

• Attendance was at or near capacity. High-attendance events impose the maximum design loads on the structure. If the structure was at or near its posted occupant load, a post-event inspection is prudent.
• Crowd behavior was unusual. Rhythmic crowd motion — spectators jumping, stomping, or swaying in unison — imposes dynamic loads that can exceed the static design loads. If the crowd was unusually active, inspect the structure.
• An incident occurred. Any incident involving the bleacher structure — a spectator fall, a guardrail impact, a reported structural noise — warrants a post-event inspection before the facility is used again.
• The event involved unusual loads. Events that involve equipment on or near the bleacher structure — media platforms, temporary lighting, sound equipment — may impose loads that were not anticipated in the original design.

What to Check After an Event

Post-event inspections are targeted, not comprehensive. Focus on the elements most likely to be affected by crowd loading:

Guardrails and handrails: Check for bent or displaced guardrail posts, loose connections at the base of guardrail posts, and damaged handrails. Crowd pressure against guardrails during high-attendance events can impose loads that approach or exceed the design capacity of the guardrail connections.

Connections at high-stress locations: Check the connections between columns and beams, between diagonal braces and main members, and at any location where the structure has shown signs of stress in previous inspections. Look for newly loose bolts, new cracks in welds, and new deformation at connection hardware.

Seat planks and footboards: Walk every row and check for newly cracked or broken planks. High-attendance events concentrate foot traffic on the planks and can cause failures that were not present before the event.

Aisle surfaces: Check for damage to aisle surfaces, particularly at the nosing strips on stair treads. Heavy foot traffic during egress can dislodge or damage nosing strips.

Accessible features: Verify that wheelchair spaces and the accessible route are undamaged and unobstructed.

Documentation

Document the post-event inspection with the same rigor as the annual inspection: date, inspector, findings, photographs of any deficiencies. Note the attendance and any unusual crowd behavior that prompted the inspection.

If deficiencies are found, assess their severity using the same three-level rating (critical, significant, maintenance) used in the annual inspection. Critical deficiencies must be corrected before the facility is used again.

Post-Storm Inspections

When a Post-Storm Inspection Is Warranted

A post-storm inspection is warranted after:

• High winds. Wind loads on bleacher structures can be significant, particularly for tall grandstand structures with large exposed surfaces. Inspect after any wind event that exceeds the design wind speed for the structure, or after any wind event that caused visible damage to nearby structures or trees.
• Heavy snow or ice. Snow and ice loads can exceed the design loads for bleacher structures, particularly in regions where heavy snowfall is unusual and the structure was not designed for high snow loads. Inspect after any snow or ice event that deposited significant accumulation on the structure.
• Flooding. Flooding can undermine bleacher foundations, deposit debris in the structure, and accelerate corrosion. Inspect after any flooding event that reached the bleacher structure.
• Hail. Large hail can damage aluminum members, dent steel members, and break wood components. Inspect after any hail event with hailstones larger than 1 inch in diameter.
• Lightning strike. A lightning strike to or near the bleacher structure can cause structural damage and can damage electrical systems associated with the structure. Inspect after any lightning strike to or near the structure.

What to Check After a Storm

Wind damage:

• Bent or displaced structural members, particularly diagonal braces and secondary members that are more susceptible to wind loads than primary members
• Displaced or missing roof or canopy panels, if the structure has a canopy
• Damaged or displaced guardrails — wind loads on guardrails can be significant, particularly for tall guardrails with solid infill panels
• Debris impact damage — flying debris during high winds can dent, crack, or puncture structural members

Snow and ice damage:

• Bent or buckled roof or canopy members from snow accumulation
• Deformed or displaced structural members from ice loading
• Damage to wood components from the weight of ice
• Foundation displacement from frost heave if the storm was accompanied by a freeze-thaw cycle

Flood damage:

• Foundation undermining — check for voids beneath column base plates and footings
• Debris accumulation in the structure — remove debris that retains moisture
• Corrosion acceleration — flooding deposits minerals and contaminants that accelerate corrosion; clean the structure after flooding
• Damage to electrical systems

General post-storm checks:

• Walk the perimeter of the structure and look for any visible damage before entering
• Check that the structure is plumb and level — storm damage can cause racking that is visible as out-of-plumb columns or uneven row heights
• Check all accessible connections for looseness or damage
• Inspect the foundation for cracking, displacement, or undermining

The Decision to Close

After a storm, the default position should be to keep the facility closed until the post-storm inspection is complete. Do not allow spectators to use the facility until you have confirmed that it is safe.

If the post-storm inspection reveals damage that you cannot fully assess — damage to structural members, foundation displacement, or any condition that raises questions about the structural integrity of the facility — close the facility and call a structural engineer before reopening.

The pressure to reopen quickly for a scheduled event is real, but it is not a valid reason to use a facility that may be structurally compromised. A structural engineer can typically conduct an emergency assessment within 24 to 48 hours. The cost of that assessment is trivial compared to the cost of a failure.

Building a Post-Event and Post-Storm Inspection Program

Designate Responsible Personnel

Designate specific individuals who are responsible for conducting post-event and post-storm inspections. These individuals should be trained in what to look for and should have the authority to close the facility if they find critical deficiencies.

Develop a Checklist

Develop a written checklist for post-event and post-storm inspections. The checklist should be shorter and more targeted than the annual inspection checklist, focused on the elements most likely to be affected by the specific event type.

Establish a Reporting Chain

Establish a clear reporting chain: who conducts the inspection, who reviews the findings, who makes the decision to reopen or keep the facility closed, and who is responsible for arranging repairs. The reporting chain should be documented and communicated to all relevant personnel.

Integrate With the Annual Inspection

Post-event and post-storm inspection findings should be incorporated into the annual inspection record. A pattern of post-event damage — repeated loosening of the same connections, repeated damage to the same guardrail section — is a signal that the underlying condition needs to be addressed, not just repeatedly repaired.

Train Your Staff

The effectiveness of a post-event and post-storm inspection program depends on the knowledge and judgment of the people conducting the inspections. Train your staff in what to look for, how to assess severity, and when to call for professional evaluation. A well-trained facility manager who knows what to look for is a far more effective safety tool than a formal inspection program conducted by someone who does not know what they are looking at.