250050 R1
113
Figure 80.
Roof Stiffening Rings Installation
Figure
9.
Roof
Stiffening
Rings
Installation
Do
not
position
more
than
one
roof
ring
joint
on
the
same
roof
sheet
Offset
roof
ring
joints
more
than
one
roof
sheet
over
Do
not
position
temperature
cable
support
on
a
roof
sheet
that
has
a
roof
ring
joint
Do
not
position
roof
ring
joints
on
a
roof
sheet
that
has
a
ladder
rung
c. Join roof stiffening rings together by inserting a ring splice into the facing ends and pushing everything
together tightly.
d. Secure the splice to the roof ring with a self-drilling screw.
Figure 81.
Stiffening Ring Connection
RING EXPANDER
RING SEGMENT
SELF DRILLING
SCREW OPTIONAL
STIFFENING RING
EQUAL
STIFFENING RING
BRACKET
5
16
" x 1
1
4
"
BOLT & NUT
STIFFENING RING
SEGMENT
EQ
EQUAL
EQ
Step #8: Remember to install inspection-hatch roof panel where required. The inspection-hatch
can be pre-assembled if desired. (See installation of "Inspection Hatch" detail page) Install
the roof ladder on the adjacent roof sheet. (see "Roof Ladder and Sheet" detail page).
Enough roof-ladder-rungs are supplied to bridge across every pair of holes on a single roof-
panel. Where roof stiffening-ring-brackets are placed, the ladder-rung can be skipped. The
roof-ring will serve as a rung in this location. Roof-ladder-rungs are installed with the higher
vertical flange facing the peak-ring.
Step #9: Add roof-rings (if required). See
“Roof Reinforcing Matrix” table below
for standard locations. Roof Rings
are joined together by inserting a
Ring Splice into the facing ends and
pushing everything together tightly.
Secure the splice to the roof ring with
a self drilling screw (see Detail 8).
The final connection uses a Ring
Expander inserted between the final
ring sections, and threading the
expansion bolts until everything is
tight. Slide stiffening ring tubes into
brackets as required. Use an
expander to make the last
connection.
On rings with multiple
expanders, the expanders should
be evenly spaced around the roof.
On roofs with multiple stiffening
rings, stagger the ring joints to
avoid having more than one joint
on same roof sheet. (Detail 7)
The last stiffening ring segment
must be field cut such that there is
a 2½" gap between the mating
tubes. With nuts close to one end,
insert long end of Ring Expander
into one tube and, by flexing both
tubes, make the connection to the
mating tube. Then thread both
nuts towards the center. The
green paint on the threaded portion
indicates the center (Detail 9)
Install the remaining stiffening
ring clips. Tighten roof hardware.
(see ‘Recommended Bolt Torque
Table’) Expand nuts on stiffening
ring expanders until slack has
been taken up and roof is snug.
Do not overtighten and crown the
roof. Nuts must be centered on
the threaded rod. Use the painted
marking as a guide. On rings with
multiple expanders, the distance
between the nuts on all of them
should be equal. (Detail 9)
Do not position more than one
roof ring joint on the same
roof sheet
Do not position
temperature cable support
on a roof sheet that has a
stiffening ring joint
Offset roof ring joints
more than one roof
sheet over
Page C4
Detail 7
Detail 9
NOTE
:
Before expanding, or “tightening” the roof, all
nuts on the Ring Expanders should be tight together
and centered.
SPLICE
e. Field cut the last stiffening ring segment so there is a 2½" gap between the mating tubes.
f. To make the final connection, insert a ring expander between the final ring sections.
g. Remove one nut from the ring expander, slide the ring expander retaining clip onto the threaded portion
against other nut. Thread removed nut back on. (See
).
h. With nuts close to one end, insert the long end of the ring expander into one tube and, by flexing both
tubes, make the connection to the mating tube. (See
i.
Thread both nuts toward the center.
The green paint on the threaded portion indicates the center.
j.
Slide stiffening ring tubes into the brackets.
EASYDRY® WIDE-CORR CENTURION® GRAIN BIN – GRAIN BIN DRYER
