A-A-50210 Revision A, May 18, 1988
RODS, LEVEL, PHILADELPHIA
Includes all amendments and changes through Validation Notice 2, March 29, 2007
The General Services Administration has authorized the use of this commercial item description in preference to Federal Specification GG-R-1506.
This description covers Philadelphia-type level rods and targets with a separate marking strip which are components of survey equipment and are intended for use as self-reading or target rods for measuring vertical distances from a horizontal line of sight.