Mueller 18x21 (D.I.Y.) with Optional Center Girts and Floor Kit - Manual (Page 12)

Mueller, Inc. 18x21 DIY Back Yard Kit Instructions; For additional information, see the D.I.Y. Installation Video
12
MaKE SURE ThE aSSEMBLY
IS SqUaRE aND LEVEL
BP-1
BP-1
Bc-1
Bc-1
C-1
C-1
C-1
C-1
C-1
C-1
C-1
C-1
r-1
eC-1
eC-1
r-1
r-2
Make sure the assembly is square.
assembly is square when the corner to
corner measurements are equal. Use
temporary bracing (not included) to
hold assembly square if required.