I have a site with a group "owners" and "members". I do not want members to have access to the ribbon or the the suite bar what do I have to modify in the master page to do that I believe I have found the correct section of the master page. I believe I should use the command:

`<SharePoint:SPSecurityTrimmedControl>` around the `<div id="s4-ribbonrow">` element but I do not know how to correctly apply this. Everything I have tried so far results in an error on the site 

    </SharePoint:AjaxDelta>
    		<div id="ms-hcTest"></div>
    		<div id="s4-ribbonrow" >
    		<div id="globalNavBox" class="noindex">
    	<div id="ribbonBox">
    	<div id="s4-ribboncont">
    		<SharePoint:AjaxDelta id="DeltaSPRibbon" BlockElement="true" runat="server">
    			<SharePoint:DelegateControl runat="server" ID="GlobalDelegate0" ControlId="GlobalSiteLink0" />
    			<SharePoint:SPRibbon
    				runat="server"
    				PlaceholderElementId="RibbonContainer"
    				CssFile="" >
    				<SharePoint:SPRibbonPeripheralContent
    					runat="server"
    					CssClass="ms-core-defaultFont ms-dialogHidden"
    					Location="TabRowLeft">
    				</SharePoint:SPRibbonPeripheralContent>
    				<SharePoint:SPRibbonPeripheralContent
    					runat="server"
    					Location="TabRowRight"
    					ID="RibbonTabRowRight"
    					CssClass="s4-trc-container s4-notdlg ms-core-defaultFont">
    					<SharePoint:SPSharePromotedActionButton runat="server"/>
    					<SharePoint:DelegateControl runat="server" ControlId="PromotedActions" AllowMultipleControls="true" />
    					<SharePoint:SPSyncPromotedActionButton runat="server"/>
    					<SharePoint:PageStateActionButton id="PageStateActionButton" runat="server" Visible="false" />

For anyone interested I accomplished this using a simple css edit in the head of the page code below if anyone needs: 

     <style type="text/css">
		#contentBox  {margin-left: 20px !important;}
		#SearchBox {display:none;}
		#suiteBarTop {display:none !important;}
		#s4-ribbonrow{display:none !important;}
	</style>
	<Sharepoint:SPSecurityTrimmedControl runat="server" PermissionsString="FullMask">
		<style type="text/css">
			#suiteBarTop{display:block !important;}
			#s4-ribbonrow{display:block !important;}
		</style>
	</Sharepoint:SPSecurityTrimmedControl>