Meaning of cross-lot bracing

cross'-lot brac'ing

Pronunciation: (krôs'lot", kros'-), [key]
— Engin., Building Trades. Engin.,Building Trades.
  1. bracing extending from one side of an excavation to the opposite to retain the earth on both sides.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.