Shotcrete/concrete construction: Back form and reinforcing for application of shotcrete to create reinforced concrete wall between cast in place concrete columns. Reinforcing steel and concrete side of form is on left side, and bracing and form away from concrete is on right side. In background, readymix concrete truck, concrete pump, compressor, and crew are placing shotcrete on walls background right. A worker is trowelling shotcrete to smooth finish on bottom half of wall background left. Pallazo, Westwood, Los Angeles, California, January 2006.