Site work for the rebuild of the collapsed Francis Scott Key Bridge finally begins next week.

This 🧵 overviews the what will occur next on the reconstruction of the Key Bridge.

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Many such cases when contractors underestimate form pressure from wet concrete.

Concrete is 2.5 times denser than water.

Rebar is artwork buried in concrete.

The Daniel Carter Beard Bridge was severely damaged in a fire.

The fire originated from a wooden playground with a rubber flooring underneath the bridge.

The highly combustible material burned with such intensity that it separated the steel bridge beams from the concrete deck.

Francis Scott Key Bridge rebuild and bridge design update.

This 🧵 overviews the bridge type, span lengths, pier protection, and how the replacement Francis Scott Key Bridge will be constructed. 1/9

The Francis Scott Key Bridge fell after the MV DALI lost power and struck a channel pier.

The pier column was hollow.

In this 🧵 details about the reinforced concrete pier design of the Key Bridge. 1/9

Bridge design and the rebuild of the Francis Scott Key Bridge.

A brief 🧵 about foundations for bridge structures and info on the upcoming Early Works construction of the replacement Key Bridge.

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Bridge design and the rebuild of the Francis Scott Key Bridge.

A brief 🧵 about foundations for bridge structures and info on the upcoming Early Works construction of the replacement Key Bridge.

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Reconstruction of I-26 over the Nolichuky River in Tennessee is making progress after being destroyed by Hurricane Helene.

The bridge abutment has been rebuilt and new prestressed concrete girders have been installed.

The other bridge on the left is open to one lane each way.

The Francis Scott Key Bridge fell after the MV DALI lost power and struck a channel pier.

The pier column was hollow.

In this 🧵 details about the reinforced concrete pier design of the Key Bridge. 1/9

Do not ever straighten rebar like this.

I cannot emphasize how bad this is for structural integrity of reinforced concrete structures.

Francis Scott Key Bridge update on removal of the existing bridge.

Bridge Demolition is the first work package that has been released by the Progressive Design Builder, Kiewit.

Bidding closed on a Prime Subcontract for turnkey demolition of the existing bridge on land.

Francis Scott Key Bridge rebuild and bridge design update.

This 🧵 overviews the bridge type, span lengths, pier protection, and how the replacement Francis Scott Key Bridge will be constructed. 1/9