Archive for the ‘structural steel’ Tag

Second TZ Section, this over Metro-North, Gone

You may recall when the first girder assembly was pushed over the Hudson Line train tracks to the first set of piersPhotos courtesy of New York State Thruway Authority.

This was followed by the second and third girder installations. Each time, Metro-North adjusted its schedule to accommodate the maneuvers.

Last Friday night, the super crane removed a second section of steel, this above the Metro-North tracks, and schedules were accommodated.

Such is the start of the changing view that will slowly evolve during the next year.

I’d like to know what you think.

Copyright © Janie Rosman and Kaleidoscope Eyes 2017

Super Crane removes first section of Tappan Zee

Another moment in history: the super crane’s first lift in a year-long process of dismantling the Tappan Zee Bridge. One hundred thirty-three deck panels and two moveable barrier machines will be sent to nearly 12 state and local municipalities.

Twenty-nine months ago the giant crane lifted its first set of structural steel girders onto piers for the new bridge near the Rockland shoreline.

Below is a cross-section of the Tappan Zee Bridge’s Westchester approach span, a little like when someone cuts into a sheet cake and lifts out a precise piece.

Eight local munis and the New York State Department of Transportation (NYSDOT) asked for desk panels, valued at nearly $3 million including removal and delivery. Details here. Photos courtesy of New York State Thruway Authority.

Each of those panels — in use until last month —  is approximately 13 feet wide by 50 feet long, 8.25 inches thick and approximately between 75,500-86,500 pounds.

The moveable barrier system will head to the New York City Department of Transportation. To learn about the bridge that will slowly disappear, click here.

I’d like to know what you think.

Copyright © Janie Rosman and Kaleidoscope Eyes 2017

E’bound Main Span Steel, all Stay Cables in Place

Earlier this week, crews set the last section of main span steel on the eastbound span. Photos courtesy of New York State Thruway Authority.

You want numbers? Here they are:

The section was 24 feet long, adding to the more than 74 million pounds of all-American-made steel and concrete across the 2,230-foot cable-stayed part of the bridge. In case you were wondering, all 192 stay cables are now installed.

One more month, and bye-bye Tappan Zee Bridge drive. Eastbound traffic joins westbound traffic on the newly-opened span so the TZB’s landings can be demolished, and the eastbound span can be connected . . . because car-jumping from approach span to land is prohibited.

I’d like to know what you think.

Copyright © Janie Rosman and Kaleidoscope Eyes 2017

Final E’Bound Main Span Steel add is Next Week

The final section of steel for the eastbound main span (above photo, courtesy of New York State Thruway Authority) was to have been added yesterday; however, nature said otherwise, and plans were moved to next week. Earlier this month, crews installed that bridge’s next-to-last section of main span structural steel.

Close-up of the eastbound span and its blue steel girders was taken by yours truly last month during the westbound span’s opening ceremony. View from that span.

I’d like to know what you think.

Copyright © Janie Rosman and Kaleidoscope Eyes 2017

Bridge Progress and Four Years in Two Minutes

Blue jump forms will help build the main span’s 419-foot towers./Photo: NYSTA

Taking a look back two years ago when the main span towers were beginning. Here are the past four years in two minutes courtesy of the project team.

I’d like to know what you think.

Copyright © Janie Rosman and Kaleidoscope Eyes 2017

%d bloggers like this: