Mueller 12x21 (D.I.Y.) with Optional Center Girts and Floor Kit - Manual (Page 6)

Mueller, Inc. 12x21 DIY Back Yard Kit Instructions; For additional information, see the D.I.Y Installation Video
6
FLOOR KIT (OPTIONAL)
NOTE: Mueller recommends the building be placed on leveling blocks (not included) to support the base channel
and purlins. Mueller also recommends the building be anchored to the ground or foundation. The method of
anchor is at the owner’s discretion.