A blast-protected structure need not look like a fortress. This general consulate building has hardening in the walls, and a special blast-wall along the driveway. The fenced “secure perimeter” creates protective standoff, and the lower concrete portion of the perimeter wall helps deflect energy of a detonation in the street.
Ordinary reinforced concrete disintegrates under the blast impact of a close or contact detonation. Spaces between reinforcing bars “punch out” easily, and transferred energy blows out spalls on the opposite side that can become lethal projectiles.