Android : Toolbar gets pushed back in landscape

Within my layout-sw600dp-land folder this layout file is for the main activity the app starts with. Once the app has started, two fragments are programmatically added to the relevant frame layouts.

This current layout causes the toolbar to be pushed back behind both frame layouts.

The viewpager fragment and the fragment on the right take up the toolbars space and the toolbar gets pushed back behind them both.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        android:orientation="horizontal" >

        <android.support.v7.widget.Toolbar
            android:id="@+id/my_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:minHeight="?attr/actionBarSize"
            app:theme="?attr/ToolBarStyle" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:baselineAligned="false"
            android:orientation="horizontal" >

            <FrameLayout
                android:id="@+id/fragment1"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:paddingRight="4dp" />

            <FrameLayout
                android:id="@+id/fragment2"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:paddingRight="4dp" />
        </LinearLayout>

        <include layout="@layout/nav_drawer_layout" />
    </android.support.v4.widget.DrawerLayout>

</LinearLayout>

What is the appropriate syntax for a dualpane(fragments) toolbar layout?