Mueller 12x18 D.I.Y. Greenhouse - Manual (Page 5)

Mueller, Inc. 12x18 D.I.Y. Greenhouse Instructions; For additional information, see the D.I.Y Installation Video
5
MAKE SURE THE ASSEMBLY IS SQUARE
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.
Make sure the assembly is
square. Assembly is square
when the corner to corner
measurements are equal.
12'
18'