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Infographic: What caused the collapse?

One possible reason for the balcony collapse that killed six people in Berkeley was water getting into the horizontal wooden beams supporting the balcony, causing dry rot, according to Gene St. Onge, a civil and structural engineer in Oakland. Read the story

The Library Gardens complex, built in 2007.

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Balcony

before

collapse

40 ft.

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Before

The balcony was supported by seven

Advertisement

horizontal wood beams.

After

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Broken wood beams protruding from the

building showed signs of dry rot.

Advertisement

All measurements are approximate.

The Library Gardens complex, built in 2007.

Advertisement

Balcony

before

Advertisement

collapse

40 ft.

Advertisement

Before

The balcony was supported by seven

Advertisement

horizontal wood beams.

After

Advertisement

Broken wood beams protruding from the

building showed signs of dry rot.

Advertisement

All measurements are approximate.

The Library

Advertisement

Gardens complex,

built in 2007.

Advertisement

Balcony

before

Advertisement

collapse

40 ft.

Advertisement

Before

The balcony was

Advertisement

supported by seven

horizontal wood

Advertisement

beams.

After

Advertisement

Broken wood

beams protruding

Advertisement

from the building

showed signs of

Advertisement

dry rot.

All measurements are approximate.

Advertisement

Before

After

Advertisement

The balcony was supported by

seven horizontal wood beams.

Advertisement

Broken wood beams protruding from

the building showed signs of dry rot.

Advertisement

The Library Gardens

complex, built in 2007.

Advertisement

40 ft.

All measurements are approximate.

Advertisement

Before

After

Advertisement

Broken wood beams protruding from

the building showed signs of dry rot.

Advertisement

The balcony was supported by

seven horizontal wood beams.

Advertisement

The Library Gardens

complex, built in 2007.

Advertisement

40 ft.

All measurements are approximate.

Advertisement

Sources: Google Earth, Gene St. Ong, civil and structural engineer, Bernard Cuzzillo, consulting engineer. Graphics reporting by Rong Gong-Lin II.

Kyle Kim, Raoul Ranoa, Lorena Iniguez Elebee@latimesgraphics




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