2
Lancaster
®
Auditorium Seating with Power & Data
Assembly Instructions
Assemble units as described herein only. To do otherwise
may result in instability. All screws, nuts and bolts must be
tightened securely and must be checked periodically after
assembly. Failure to assemble properly, or to secure parts
may result in assembly failure and personal injury.
Preliminary Mounting
Hole Layout
1. Follow the space-planning layout
provided and determine where
uprights with and without tablet
arms are located.
Note:
On radiused installations,
the front slots of the upright are
shifted closer together. Rear slots
always remain at the appropriate
dimension matching the seat size:
20”, 22”, 23
3
/
8
”, or 24” (Detail
A, “Radius Chart” and
“Tolerances for Mounting
Uprights”).
2. Carefully locate the upright
mounting holes and the
appropriate floor anchors as
specified in the space-planning
layout provided. Study “Detail A”,
the guidelines in the “Radius
Chart” and “Tolerances for
Mounting Uprights.”
Radius Chart
The chart is a guide to front slot,
center-to-center dimensions for
specific radius installations. This
dimension can be measured from
front bracket to front bracket. Rear
slot center-to-center dimension
must remain at 20”, 22”, 23
3
/
8
”,
or 24” for straight runs and radius
installations. For a radius of 40’ or
less,
1
⁄
8
” is added to nominal
center-to-center spacing of rear
slots.
RADIUS CHART – Front Hole Spacing for Upright Foot
Radius (ft)
20” Seat
21” Seat
22” Seat
23” Seat
24” Seat
20’*
19
19
/
32
”
20
25
/
32
”
21-
19
/
32
”
22
25
/
32
”
23
19
/
32
”
25’*
19
23
/
32
”
20
29
/
32
”
21
23
/
32
”
22
29
/
32
”
23
23
/
32
”
30’*
19
25
/
32
”
21”
21
25
/
32
”
23”
23
25
/
32
”
40’*
19
7
/
8
”
21
3
/
32
”
21
7
/
8
”
23
3
/
32
”
23
7
/
8
”
60’ 19
27
/
32
”
21
3
/
16
”
21
27
/
32
”
23
3
/
16
”
23
27
/
32
”
100’
19
29
/
32
”
21
1
/
4
”
21
29
/
32
”
23
1
/
4
”
23
29
/
32
”
200’
19
15
/
16
”
21
5
/
16
”
21
15
/
16
”
23
5
/
16
”
23
15
/
16
”
300’
19
31
/
32
”
21
11
/
32
”
21
31
/
32
”
23
11
/
32
”
23
31
/
32
”
400’-straight 20” 21
3
/
8
”
22”
23
3
/
8
”
24”
*
1
/
8
” is added to nominal center-to-center spacing of rear slots.
Note:
See space-planning layout for specific anchor bolt locations per seat, per row. The chart dimensions are
a reference to aid in upright alignment.
Note:
For seating with tablet arms, use the dimensions from the chart above. Tablet arms cannot be installed
on a radius less than 30 ft.
TOLERANCES FOR MOUNTING UPRIGHTS
Slot Centerline
Floor Bolt Centerline
Front
Rear
5/16” Diam.
3/8” Diam.
Minimum Radius (20”)
+7/16/-1/16
+/-3/16
+9/16/-3/16
+1/2/-1/8
Median Radius
+/-1/4
+/-3/16
+/-7/16
+/-3/8
Straight Installation
+1/16/-7/16
+/-3/16
+3/16/-9/16
+1/8/-1/2
