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</topic><topic id="https://vocabularios.eca.usp.br/vcaa/skos/706"><instanceOf><topicRef xlink:href="#term"/></instanceOf><baseName><baseNameString>lajes protendidas</baseNameString></baseName>  <occurrence>    <instanceOf>      <topicRef xlink:href="#scope-note"/>    </instanceOf><baseName><baseNameString><![CDATA[ <p><span data-sheets-root="1">Lajes protendidas, também conhecidas como lajes com armaduras ativas, são aquelas cujo aço passa pelo processo de protensão. Comparadas às lajes convencionais, são mais esbeltas e suportam vãos maiores entre os apoios. Isso porque a técnica de protensão, que alonga os cabos e cordoalhas da armadura por meio de uma ação externa com macacos hidráulicos, garante esforços de tração permanentes ao aço e maior compressão ao concreto.<br /><br />Fonte: <a class="in-cell-link" href="https://www.aecweb.com.br/revista/materias/lajes-protendidas-vencem-grandes-vaos-e-reduzem-o-peso-da-estrutura/16200" target="_blank" rel="noopener">https://www.aecweb.com.br/revista/materias/lajes-protendidas-vencem-grandes-vaos-e-reduzem-o-peso-da-estrutura/16200</a> </span></p> ]]> </baseNameString></baseName>  </occurrence></topic>  <association>    <instanceOf>      <topicRef xlink:href="#broader-narrower"/>    </instanceOf>    <member>      <roleSpec>  <topicRef xlink:href="#narrower"/>      </roleSpec>      <topicRef xlink:href="#https://vocabularios.eca.usp.br/vcaa/skos/706"/>    </member>    <member>      <roleSpec>  <topicRef xlink:href="#broader"/>      </roleSpec>      <topicRef xlink:href="#https://vocabularios.eca.usp.br/vcaa/skos/700"/>    </member>  </association></topicMap>