Keywords: Haer PBG erection force Diagram part.png en Erection Sequence and Force Diagram Three Sisters Bridges from HAER Reduced from original TIF file found here http //memory loc gov/cgi-bin/displayPhoto pl path /pnp/habshaer/pa/pa3600/pa3659/sheet topImages 00002a gif topLinks 00002r tif 00002a tif title displayProfile 0 and then edited to remove non erection sequence/force diagram material rearrange some text and convert to png which I believe does not change the public domain status of the image but in case my changes to it require license I hereby release back to PD see below ; Original Image Drawing 2 of 8 Reuse or reproduction requests credit to original draftsmen to wit Delineated by Julie A Maleeva James P Hanley Susan H Gordon 1998 Thomas M Behrens 1999 en wikipedia Jay8g CommonsHelper 2006-01-21 Delineated by Julie A Maleeva James P Hanley Susan H Gordon 1998 Thomas M Behrens 1999 technology HABS PD-USGov-Interior-HABS Lar Original upload log page en wikipedia Haer_PBG_erection_force_Diagram_part png 2006-01-21 05 18 Lar 1320×320× 11028 bytes <nowiki> Summary Erection Sequence and Force Diagram Three Sisters Bridges from HAER Reduced from original TIF file found here and then edited to remove non erection sequence/force diagram material rearrange some text and convert to png which does not cha</nowiki> Three Sisters Pittsburgh |