The center post in the back has cracked at the joint on the bottom.  It is a straight t joint that the poles snap into.  The designer doubt was an engineer.  For the weight that the pieces are made from metal is not heavy enough.  They needed to have at least one more between each existing pole on the sides and up and across the top. also, there were simple bars from the corner poles to the base pole.  There should also been stability bars from the center poles to the bass and from each pole at the top to the poles that make up the roof to the center pole.  It was designed to break.  It has half the strength as the smaller fenced in yard with door for chickens.  I love the size though. Now they cN bicker and have room to keep out of each others ways.  If I move it I will have to get at least 3 other people to help me.  I will need to move it so. I can cut down a broker limb and it is right under it.