Mueller 12x21 (D.I.Y.) with Optional Center Girts and Floor Kit - Manual (Page 14)

Mueller, Inc. 12x21 DIY Back Yard Kit Instructions; For additional information, see the D.I.Y Installation Video
14
EC-1
EC-1
EC-1
EC-1
R-1
R-1
R-2
RP-1
RP-1
ROOF PURLIN (RP-1)
Open side of RP-1 faces to center of building