Hi studiolegalebonta
You're right, the 'content-mass-top' and 'content-mass-bottom' are not included in no-sidebar layout.
You can open that file: /tpls/blocks/mainbody/no-sidebar.php
and load these 2 positions like below:
<?php
/**
* @package T3 Blank
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
/**
* Mainbody 1 columns, content only
*/
?>
<div id="t3-mainbody" class="container t3-mainbody">
<div class="row">
<!-- MAIN CONTENT -->
<div id="t3-content" class="t3-content col-xs-12">
<?php if ($this->countModules('content-mass-top')) : ?>
<!-- CONTENT MASS TOP -->
<div class="t3-content-mass-top <?php $this->_c('content-mass-top') ?>">
<jdoc:include type="modules" name="<?php $this->_p('content-mass-top') ?>" />
</div>
<!-- //CONTENT MASS TOP -->
<?php endif ?>
<?php if($this->hasMessage()) : ?>
<jdoc:include type="message" />
<?php endif ?>
<jdoc:include type="component" />
<?php if ($this->countModules('content-mass-bottom')) : ?>
<!-- CONTENT MASS BOTTOM -->
<div class="t3-content-mass-bottom <?php $this->_c('content-mass-bottom') ?>">
<jdoc:include type="modules" name="<?php $this->_p('content-mass-bottom') ?>" />
</div>
<!-- //CONTENT MASS BOTTOM -->
<?php endif ?>
</div>
<!-- //MAIN CONTENT -->
</div>
</div>