François Coignet
... that François Coignet was the first builder to use iron reinforced concrete?
... that <b id="mwCpU"><a class="new" data-mw-i18n='{"title":{"lang":"x-page","key":"red-link-title","params":["François Coignet"]}}' href="./François_Coignet?action=edit&amp;redlink=1" id="mwCpY" rel="mw:WikiLink" title="François Coignet" typeof="mw:LocalizedAttrs">François Coignet</a></b> was the first builder to use iron <a href="./Reinforced_concrete" id="mwCpc" rel="mw:WikiLink" title="Reinforced concrete">reinforced concrete</a>?