File:Temporary Post-Tensioning and Slab Alignment-2 VA (8496286346).jpg

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Description	Each slab was post-tensioned partially during installation. This process was termed “temporary post-tensioning” and utilized bars at two of the post-tensioning ducts instead of tendons. This process also used minimal post-tensioning forces and served to improve the alignment of each slab as it was installed. The FHWA, Highways for LIFE project with VDOT demonstrated the use of precast concrete pavement system (PCPS) technology and jointed precast pavement system-Super-Slab® to replace concrete slabs on a section of I-66 and a ramp lane leading to US-50 West during nighttime partial or full closures.
Date	8 October 2009, 02:02
Source	Temporary Post-Tensioning and Slab Alignment-2_VA
Author	Federal Highway Administration

Licensing

This image was originally posted to Flickr by Federal Highway Administration (FHWA) at https://flickr.com/photos/64293484@N05/8496286346 (archive). It was reviewed on 17 August 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

17 August 2018

This image is a work of a United States Department of Transportation employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:33, 17 August 2018		2,048 × 1,536 (1.19 MB)	Tyler ser Noche (talk \| contribs)	Transferred from Flickr via #flickr2commons

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Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Camera manufacturer	SONY
Camera model	DSC-W90
Author	Federal Highway Administration
Exposure time	1/6 sec (0.16666666666667)
F-number	f/3.5
ISO speed rating	160
Date and time of data generation	02:02, 8 October 2009
Lens focal length	8.7 mm
Image title	Each slab was post-tensioned partially during installation. This process was termed “temporary post-tensioning” and utilized bars at two of the post-tensioning ducts instead of tendons. This process also used minimal post-tensioning forces and served to improve the alignment of each slab as it was installed. The FHWA, Highways for LIFE project with VDOT demonstrated the use of precast concrete pavement system (PCPS) technology and jointed precast pavement system-Super-Slab® to replace concrete slabs on a section of I-66 and a ramp lane leading to US-50 West during nighttime partial or full closures.
Short title	Temporary Post-Tensioning and Slab Alignment-2_VA
Orientation	Normal
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
File change date and time	02:02, 8 October 2009
Y and C positioning	Co-sited
Exposure Program	Normal program
Exif version	2.21
Date and time of digitizing	02:02, 8 October 2009
Meaning of each component	Y Cb Cr does not exist
Image compression mode	4
APEX shutter speed	2.584963
APEX aperture	3.61471
APEX exposure bias	0
Maximum land aperture	3 APEX (f/2.83)
Metering mode	Pattern
Light source	Unknown
Flash	Flash fired, strobe return light detected, compulsory flash firing
Supported Flashpix version	1
Color space	sRGB
File source	Digital still camera
Scene type	A directly photographed image
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Scene capture type	Standard
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Date metadata was last modified	04:51, 20 February 2013
Unique ID of original document	00A155F78B1BEEF63F2652CF437B3F56
Copyright status	Copyrighted
Keywords	slab post-tension precast concrete pavement systems PCPS precast prefabricated US 50W I-66 Chantilly Fairfax County VA 2009
Contact information	www.fhwa.dot.gov 1200 New Jersey Avenue, SE Washington, DC , , 20590 United States
IIM version	4

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File:Temporary Post-Tensioning and Slab Alignment-2 VA (8496286346).jpg

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