Mueller 9x12 (D.I.Y.) with Optional Center Girts and Floor Kit - Manual (Page 12)

Mueller, Inc. 9 x 12 DIY Back Yard Kit Instructions; For additional information, see the D.I.Y Installation Video
12
R-1
EC-1
EC-1
R-1
RP-1
RP-1
ROOF PURLIN
Open side of RP-1 faces to center of building