Studied from its original page

Culmann earth-pressure construction

Culmann's earth-pressure construction · Culmann line · Druck eines Erdkörpers auf eine ihn stützende Wand

See the original page — Taf. 28, left half (archive leaf n787); right half leaf n788

Published 1866 (A) and Culmann died in 1881, so life+70 ended in 1951 (B).

The data it needs

trial direction parameter ordering the trials · angle · degree
ordinate value per trial · quantitative · force (drawn as a length on the force scale)
maximum output (design value) · quantitative · force

Built in 6 steps, as its maker described

§157, pp. 563–571; Taf. 28 (bound after the text, archive leaves n787–n788)

Skeleton drawing, not the original plate

121 other forms share this skeleton

Attribution checked against the source