9
UNDERTRUSSING AND POLYTIER SUPPORTS
INSTALLATION OF UNDERTRUSSING
INSTALLATION OF POLYTIER SUPPORTS
When installing some conveyors, using a per-
manent support or ceiling hanger is simply not
practical. In this situation, three bed sections
(maximum) may be joined together utilizing
truss assembly, mounted underneath conveyor
(see illustration above).
Adjoin beds on floor using both connector rod
support assemblies and connector rods (5/8”
diameter-11UNC threaded rod). The diagonal
connector rod is used not only to support the
intermediate bed section joint but it is instru-
mental for setting and maintaining proper ten-
sion across intermediate spanned beds.
Use mechanical hoist (fork truck or other
means) to raise pre-assembled bed sections
(with undertrussing) to desired elevation
for final installation.
Use diagonal connector rods to level the under-
trussed beds both along and across the con-
veyor. Remember that the tension must provide
adequate for both dead load (conveyor weight)
and product load during unit operation.
WARNING:
It is the responsibility of the
customer and installation personnel to sup-
ply and install net or mesh guarding on
conveyors mounted overhead to prevent
product and/or debris from falling to floor
in areas where required.
NOTE:
To install, raise conveyor to
desired elevation, place cross pipe
underneath lower conveyor flange,
attach cross pipe to upright legs and use
U-shaped retainer (“hat”) bracket to con-
nect cross pipe to lower conveyor flange.
Polytier supports provide convenient
installation method for two or more tiers
of conveyor. To install, raise conveyor to
desired elevation (approximate). Place 1”
inside diameter cross pipe underneath
lower conveyor flange. Attach cross pipe
to upright legs. Use U-shaped retainer
(“hat”) bracket to connect cross pipe to
lower conveyor flange. Do not tighten
fully at this time.
There are two styles of attachment brackets
available for use with polytier supports.
Minimum elevation style (see TYPE “0”,
illustration above) offers lowest unit eleva-
tion, 0” + frame depth utilizing L-shaped
mounting bracket. Standard elevation style
offers unit elevation of 3-1/2” + frame
depth and includes bracket welded to cross
pipe which is bolted to upright legs during
installation.
When unit is at operating elevation and
unit has been checked across width for
level, tighten locking bolts in U-shaped
bracket. Add knee braces for unit rigidity.
*NOTE:
Overall conveyor height is dic-
tated by type of drive assembly used--i.e.
underneath, center drive, sidemount, etc.
TYPE “0”
MIN. ELEVATION
IS 7-1/4” T.O.R +
0”*
STD. STYLE
MIN. ELEVATION
IS 3-1/2”
+ 7-1/4”*
POLYIER SUPPORT CHANNEL HEIGHT
PSM-1
23”
PSM-6
53”
PSM-11
83”
PSM-2
29”
PSM-7
59”
PSM-12
89”
PSM-3
35”
PSM-8
65”
PSM-13
95”
PSM-4
41”
PSM-9
71”
PSM-14
101”
PSM-5
47”
PSM-10
77”
PSM-15
107”
Summary of Contents for 251CALR
Page 1: ......
