The idea being tested is how temporary braces are anchored to resist wind during tilt-up erection. A concrete deadman is buried behind the wall and acts as a counterweight to the lateral push from wind on the brace and form. Designers and field practice use a rule of thumb that the deadman’s weight should be on the same order of magnitude as the wind load the brace must resist. That sizing provides enough resistance through weight and soil friction to keep the brace from moving or pulling out while connections are made and curing proceeds. Of course the exact numbers depend on wind speed, brace geometry, wall height, soil conditions, and safety factors, but the general principle is that the deadman is nearly as heavy as the wind load it has to counter, which is why this statement is considered true.