DUCT
A
CH
CV
E
F
SIZE
2-WAY
3-WAY
4-WAY
2″
8
11 3/8
14 3/4
3 7/16
3 7/16
4 1/4
1 3/4
3″
10 1/4
14 3/4
19 3/8
4 9/16
4 9/16
4 3/4
2 1/4
4″
12 1/4
17 3/4
24 1/4
5 9/14
5 9/16
5 1/4
2 3/4
 
1 1/2″ SEPARATION
DUCT
A
CH
CV
E
F
SIZE
2-WAY
3-WAY
4-WAY
2″
9 1/2
13 1/2
17 3/8
3 15/16
3 15/16
4 1/4
1 3/4
3″
11 1/4
16 1/4
21 3/8
5 1/16
5 1/16
4 3/4″
2 1/4″
4″
13 3/4″
19 3/4″
25 7/8″
6 1/16
6 1/16″
5 1/4″
3 1/8
5″
15 7/8″
22 7/8″
30″
7 1/16″
7 1/16″
5 7/8
3 5/8
6″
18
26 1/4″
34 3/8″
8 3/16″
8 3/16″
6 3/8″
4 1/4″
 
2″ SEPARATION
DUCT
A
CH
CV
E
F
SIZE
2-WAY
3-WAY
4-WAY
2″
10 1/4″
14 3/4″
19 3/8″
4 9/16″
4 9/16″
4 1/4″
1 3/4″
3″
12 1/4″
17 3/4″
24 1/4″
5 9/16
5 9/16″
4 3/4
2 1/4″
4″
14 1/4″
20 7/8″
27 1/4″
6 9/16″
6 9/16″
5 1/4″
3 1/8″
5″
16 3/8″
24 1/8″
31 3/4″
7 5/8
7 5/8
5 7/8″
3 5/8″
6″
19 1/2
27″
35 5/8″
8 5/8
8 5/8
6 3/8
4 1/4
 
3″ SEPARATION
DUCT
A
CH
CV
E
F
SIZE
2-WAY
3-WAY
4-WAY
2″
11 5/8
16 7/8″
22 1/8
5 1/4
5 1/4″
4 1/4″
1 3/4″
3″
14 1/4″
20 7/8″
27 1/4″
6 9/16″
6 9/16″
4 3/4
2 5/8″
4″
16 3/8″
24 1/8″
31 3/4″
7 5/8″
7 5/8″
5 7/8″
3 5/8″
5″
19 1/2″
27″
35 5/8
8 5/8
8 5/8″
6 3/8″
4 1/4
6″
19 1/2
29 1/8″
38 3/4″
9 5/8″
9 5/8″
6 3/8″
4 1/4″
 
1″ SEPARATION / BELL TELEPHONE
DUCT
A
CH
CV
E
F
SIZE
2-WAY
3-WAY
4-WAY
4″
11 11/16″
17 1/8″
22 3/8″
5 5/16
5 5/16
3 2/3″
2 5/8″
** Standard base clearance from trench floor is 1″ – 3″ is also available
A TYPE OF SPACER M – Module (Interlocking) U – Unit Type Spacer
MB – Module Base (Interlocking) IU – Interlocking Unit Spacer
IC – Interlocking Converter Module MC – Module Cap (Interlocking)
 
B Indicates the nominal duct size spacer is to accommodate.
Note: For converter module spacers, both duct sizes will be shown. (i.e. 5-4)
 
C  TYPE OF DUCT  A – Plastic duct; Iron pipe size    

T – Bell spec AT 8546, Plastic duct

 
D  Indicates number of ducts abreast for each tier.     
      
E Horizontal duct separation in 1/10″. Note: For interlocking caps, only horizontal dimension is shown.     
      
F Vertical duct separation in 1/10″.     
ABCDEF
TYPE OF
SPACER
NOMINAL
DUCT SIZE
TYPE OFDUCTDUCTS PER
TIER
HORIZONTAL SEPARATIONVERTICAL
SEPARATION
M5A32020

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