Bridge design for vessel collision. A🧵. The main span of the Francois Scott Key Bridge is 1300 ft. It also has 185 ft of clearance, making this a massive bridge. This type of bridge is considered complex. Baltimore is in for a long haul before replacement. Here is why. 1/x

Demolition of the Howard Frankland Bridge in Tampa begins this week. The new bridge crossing opened for SB traffic in March 2025. Just recently the NB traffic has moved onto the old SB bridge, which opened in 1990. The bridge that is being removed was completed in 1960.

The demolition of the Francis Scott Key Bridge begins today. Cranes and equipment are now being mobilized to the site. The schedule for removal of the existing bridge estimates 9 months. This demolition work begins over 15 months after the Key Bridge collapse from the Dali.

RT @yacineMTB: If I can teach you one thing; it's to never ever doubt your instinct. If your instinct tells you something, it's right. Your….

The historic Joppa Iron Truss Bridge, built in 1907, has collapsed from the flooding in Central Texas.

The flooding in Texas is a tragedy with at least 46 deaths and many more missing. The emergency response rescue effort is on going. The final toll on life and infrastructure is still to be seen. This storm event is at least a 500 year storm. A tragedy. 8/8.

What made the historic Joppa Bridge a special bridge is not because it was a one of a kind bridge, but because it was a routine everyday bridge. It was reliable and cost efficient way to connect communities communities across the United States. 7/8

The top chord of this Truss bridge is in compression and the bottom is in tension. The diagonal struts experience both tension and compression. The patent for the Pratt Truss Bridge was the direction of the diagonals, sloping downward towards the center of the span. 6/8

The Pratt Truss Bridge was designed to be a structurally efficient bridge that optimized material use of the wrought iron or steel. From a bridge design perspective, it was a determinant structure, which simplified the engineering to calculate force effects. A basic truss. 5/8

In the late 1800s and early 1900s the Pratt Truss Bridge was one of the most common bridges to be built. Tens of thousands of these bridges were built across the United States. What made the Pratt Truss Bridge type so prevalent? 4/8.

A bond election was held in Burnet County, Texas in 1906 to fund the construction of three waterway bridges. The Joppa bridge crosses the North Fork of San Gabriel River and it was built near the church and school. This water crossing was the last of the three bridges. 3/8

The Joppa bridge floated away after the flood waters were overtopping the deck. Failure of the bridge either came from buoyancy forces lifting the structure off its bearings. Or from storm debris and scour destroying the column. 2/8.

The Joppa Bridge in Bertram was washed away during the catastrophic flooding in Central Texas. This historic bridge was built in 1907 and was a Pratt Truss Bridge with a span length of 136.2 feet. A brief🧵 on bridge design and history of this truss bridge. 1/8

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I worked on some of the preliminary engineering for Texas high speed rail. Funding is ready to be secured. This thing is ready to go if regulatory and legal hurdles are cleared.

Fall protection saves another life. Don't skip steps on traffic control.

We still fly flags on my bridges.

We hit our regulatory maximum of 2 fish each, great day. Back to shore on a rainy Florida afternoon.

There are no situations to be monitored today, only red snapper and grouper.