Improvements in the calculation of over-the-ground transport of solid objects by air blast have been made so that the DIAL PACK results are satisfactorily simulated with constant parameters over the range of incident pressures 15 to 100 psi. These calculations have then been combined with computational techniques for predicting unreinforced masonry wall collapse to derive an outline scenario for blast impact on an actual building at two incident overpressures, 1 and 30 psi.