A documented pile-and-anchor system
David Cefali's June 7, 2018 update identifies soldier piles and tiebacks as Cefali's work at 8777 Washington. Those elements work together: the wall retains the ground, and anchors transfer loads into the ground behind it.
The excavation and the new structure
An earth retention layout needs to fit the full excavation and the space required for foundations. Geotechnical criteria, wall position, adjacent construction, and the contractor's access plan determine which support arrangements can be developed.
Room behind and inside the wall
Tiebacks use ground behind a wall, while internal braces occupy the excavation. Available property rights, buried obstructions, and construction space therefore affect system selection. The appropriate arrangement is established from the conditions of each project.