In a high-rise building with curtain walls, the hazard from glass is primarily due to which phenomenon?

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Multiple Choice

In a high-rise building with curtain walls, the hazard from glass is primarily due to which phenomenon?

The key idea is that the exterior curtain wall presents a major risk from glass flying outward when exposed to fire. Curtain walls are non-structural, glass-faced exteriors attached to the building’s frame. When a high-rise fire heats these panels, the glass can heat unevenly and fail or shatter, and pressure differences between inside and outside (plus wind) can propel broken glass away from the building. Those shattered pieces become high-velocity projectiles that can injure firefighters and occupants at a distance or through openings. Internal smoke layers and debris from equipment are hazards in fires, but they aren’t the primary danger presented by curtain-wall construction. Structural cracking of the core is a structural concern, not the main hazard associated with the curtain-wall glass itself. So, the protective takeaway is to anticipate and mitigate flying glass when operating around curtain walls, maintaining distance and using strategies that reduce exposure to potential glass projectiles.

The key idea is that the exterior curtain wall presents a major risk from glass flying outward when exposed to fire. Curtain walls are non-structural, glass-faced exteriors attached to the building’s frame. When a high-rise fire heats these panels, the glass can heat unevenly and fail or shatter, and pressure differences between inside and outside (plus wind) can propel broken glass away from the building. Those shattered pieces become high-velocity projectiles that can injure firefighters and occupants at a distance or through openings.

Internal smoke layers and debris from equipment are hazards in fires, but they aren’t the primary danger presented by curtain-wall construction. Structural cracking of the core is a structural concern, not the main hazard associated with the curtain-wall glass itself.

So, the protective takeaway is to anticipate and mitigate flying glass when operating around curtain walls, maintaining distance and using strategies that reduce exposure to potential glass projectiles.

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