I wan to do this:

<rich:scrollableDataTable
 value="#{historico}" var="per" rowKeyVar="rkv"
 frozenColCount="0" height="400px" width="1150px" rowClasses="popo">
 <rich:column>
 <f:facet name="header">
 <h:outputText value="Acta" />
 </f:facet>
 <h:outputText value="#{per.acta}" />
 <br/>
 <h:outputText value="#{per.acta2}" />
 </rich:column>
</rich:scrollableDataTable>

I tried with:
.popo {
height: 50px;
}
and i just can see "#{per.acta}", but "#{per.acta2}" i see distorted

Thanks, sorry my bad english, im from Paraguay