They noted that although the blast wave was of about the same pressure as that of a high-explosive bomb, the duration of the effect was longer and that brick buildings were collapsed as far as at Hiroshima and at Nagasaki, while traditional wood houses were about the same, while reinforced-concrete structures suffered structural damage or collapse up to at Hiroshima and at Nagasaki.
They noted that although the blast wave was of about the same pressure as that of a high-explosive bomb the duration of the effect was longer and that brick buildings were collapsed as far as at Hiroshima and at Nagasaki while traditional wood houses were about the same while reinforced-concrete structures suffered structural damage or collapse up to at Hiroshima and at Nagasaki