assembly_hard_2.xml

<?xml version="1.0"?>
<!-- This is hard assembly 2 -->
<assembly>
    <component beam="b7" base="True"/>
    <component beam="b4" />
    <component beam="b5" />
    <component beam="b6" />
    <component beam="b9" />
    <component beam="b8" flipped="True"/>
    <connection name="C1">
        <element component="b4" joint="b4j1" />
        <element component="b7" joint="b7j1" />
    </connection>
    <connection name="C2">
        <element component="b5" joint="b5j1" />
        <element component="b7" joint="b7j5" />
    </connection>
    <connection name="C3">
        <element component="b4" joint="b4j3" />
        <element component="b8" joint="b8j1" />
    </connection>
    <connection name="C4">
        <element component="b5" joint="b5j3" />
        <element component="b8" joint="b8j5" />
    </connection>
    <connection name="C5">
        <element component="b6" joint="b6j1" />
        <element component="b7" joint="b7j2" />
    </connection>
    <connection name="C6">
        <element component="b6" joint="b6j2" />
        <element component="b9" joint="b9j3" />
    </connection>
    <connection name="C7">
        <element component="b6" joint="b6j3" />
        <element component="b8" joint="b8j4" />
    </connection>
</assembly>