AASHTO LRFD is applicable, usually supplemented by proeject specific design criteria. We typically incorporate some of PTI's recommendations for stay cable design, testing, and installation.
Also, ASCE has a slim booklet "Guidelines for the Design of Cable Stayed Bridges".
For spread footings for bridges, the AASHTO LRFD specifications have rules for maximum eccentricity under strength load combinations: For spread footings on soil e < B/4, where B is footing width, for rock e < 3/8 B. Therefore, assuming triangular distribution, on soil you will need compression...
Wx is the equivalent of Sx - W stands for "Widerstandsmoment".
Moment of Inertia is usually denoted either Ix or Jx in German.
1000 cm3 = 61 in3
Gregor Wollmann
