Iris hut
... that the Iris hut, used by the British in the Second World War alongside the better-known Nissen hut, had a major design flaw that caused it to collapse after snowfalls?
... that the <b id="mwCDs"><a href="./Iris_hut" id="mwCDw" rel="mw:WikiLink" title="Iris hut">Iris hut</a></b>, used by the British in the <a class="mw-redirect" href="./Second_World_War" id="mwCD0" rel="mw:WikiLink" title="Second World War">Second World War</a> alongside the better-known <a href="./Nissen_hut" id="mwCD4" rel="mw:WikiLink" title="Nissen hut">Nissen hut</a>, had a major design flaw that caused it to collapse after snowfalls?