Grzegorz K Precast System, Details, Sketches
Laurin Moseley Solid Wall Freehand Sketch
https://openlab.citytech.cuny.edu/btech3research/2017/04/26/solid-wall-section-sketch/
Solid Wall Sketch Detail
https://openlab.citytech.cuny.edu/eumana-eportfolio/btech-3/