Dear blink black,
Because sj health template is responsive, the width of left, main, right groupd is automatically changed on each different devices.
If we fix the width, the template is not good on each different devices.
If you want to still to fix it, you can set it in the layout files.
Example: left-main-right.xml file in "templates\sj_health\layouts", finding:
<content html5tag="section" order="6" id="content">
<positions>
<position class="span12" group="left" style="ytmod2" type="modules">position-6</position>
<position
class="span12"
group="main" type="message"></position>
<position
class="span12"
group="main" style="ytmod" type="modules">breadcrumb</position>
<position
class="span12"
group="main" type="component">component</position>
<position
class="span12"
group="main" style="ytmod2" type="modules">position-5</position>
<position class="span12" group="right" style="ytmod" type="modules">position-7</position>
<position class="span7 first-child" data-stablet="span12" style="ytmod" type="modules">position-c</position>
<position class="span5" data-stablet="span12" style="ytmod" type="modules">position-d</position>
</positions>
</content>
change to your mean.
Thanks