Expansion ring – Grain Systems PNEG-707GSI User Manual
Page 78
6. Tower Roof
78
PNEG-707 12', 18', 24' and 30' GSI Commercial Tower Dryer
Expansion Ring
After expansion ring clips are installed to tower roof sheets, install expansion ring sections as follows.
Use expansion ring hardware.
Double nut (spin two (2) nuts closely
together) each expansion bolt.
NOTE: Expansion bolts should be fully contracted during installation. In other words, leave double nuts
spun closely together until after expansion ring is complete.
1. Insert first expansion ring section into expansion ring clips.
Double nut an expansion bolt and screw into first expansion safety ring section.
Insert next expansion ring section into adjoining expansion ring clips. Screw second expansion ring
section onto free end of first expansion bolt.
Continue installing expansion ring sections until ring is complete around tower roof.
2. Tighten all tower roof bolts, including bolts on eave clips and intermediate eave clips.
3. Tighten expansion bolts between expansion ring sections by spinning double nuts apart. Spin nuts
evenly around tower roof until expansion ring lifts tower roof to show a slight crown.
Figure 6Y Expansion Ring Sections
Figure 6Z Expansion Ring Hardware
A
B
C
A. Expansion ring clip (4")
B. 1" x 6" (Full thread) Expansion bolts
C. 1" Expansion nuts