Mueller 18x21 (D.I.Y.) with Optional Center Girts and Floor Kit - Manual (Page 32)

Mueller, Inc. 18x21 DIY Back Yard Kit Instructions; For additional information, see the D.I.Y. Installation Video
32
TOTaL BUILDINg MEaSUREMENTS
21'2" 18'2"
8'2"
9'1"