WMATA: Dulles Corridor Metrorail Project Pictures 05 07 2011,
Lifting Gantry #1



Post-tension lifting gantry support stand.


Post-tension lifting gantry support stand.


Post-tension lifting gantry support stand.

The first group of pictures, below, of the north side of the gantry were taken in the morning shortly after 9:00 AM, the second from the south side were taken around 12:30 PM.

You will notice in the AM group that 2 of the 9 segments in span have been set to their final position. In the PM group 7 of the 9 segments have been set to their final position. As I was taking the second group of pictures the operators working hoist on the gantry were positioning the 8th segment to its final position.

It appears that all of the segments in a given span, provided the contractor it not restricted by the movement of traffic under the gantry, can set all of segments in a single day.

Obviously the gantry can't be advanced to the position of the next span until the cement between the segment has cured and tensions cables have been installed and pulled fastened in place.


North side post-tension lifting gantry #1 Scotts Crossing Road.


North side post-tension lifting gantry #1 Scotts Crossing Road.


North side post-tension lifting gantry #1 Scotts Crossing Road.


North side post-tension lifting gantry #1 Scotts Crossing Road.


North side post-tension lifting gantry #1 Scotts Crossing Road.


Post-tension lifting gantry #1 east of Tysons East (Tysons McLean).


Post-tension lifting gantry #1 Scotts Crossing Road.


Post-tension lifting gantry #1 Scotts Crossing Road.


Post-tension lifting gantry #1 Scotts Crossing Road looking east.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.


Post-tension lifting gantry #1 Scotts Crossing Road looking north.

1017 06 05 2011

© 2011 John R Cambron

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