ROUND FIBERGLASS
HOLE FORMS FOR MORTAR JOINTS IN STRAIGHT WALL/ FLATWALL STRUCTURES
For holes not intended
for field installed rubber connectors
Hole diameters shown below are measured at the face of the Hole Form or at the core surface of the form
Both through holes and
partial indentation knock out forms available* *partial hole/knockouts
must be ordered with attachment so they can be held tight
to jacket wall
Hole form diameters do
not represent specific inside pipe diameter applications
Hole
Dia.
6"
Wall
Taper
8"
Wall
Taper
12"
Wall
Taper
Hole Form
Face Diameter
Part
No.
Degrees
Part No.
Degrees
Part No.
Degrees
4"
46
10
48
10
5"
56
6
6"
665
5
68
5
6"
66
15
8"
86
10
88
10
10"
106
10
108
10
12"
126
12
128
12
14"
146
10
148
10
15"
156
10
158
10
16"
166
10
168
10
18"
186
10
188
10
20"
206
10
20810
10
201210
10
21"
216
10
22"
226
10
228
10
23"
236
10
24"
246
15
24815
15
24125
5
25"
256
3
26"
26610
10
26810
10
26125
5
27"
276
5
278
5
28"
286
18
288
28810
18
10
281210
10
30"
306
10
308
10
30125
5
32"
326
10
32810
10
34"
34610
10
34810
10
341210
10
36"
366
10
36810
10
361210
10
38"
386
20
38820
20
40"
406
18
408
18
401210
10
41"
416
10
418
10
42"
426
10
428
10
421210
10
44"
446
14
448
14
48"
486
10
488
10
52"
526
6
528
6
55"
556
5
558
5
58"
586
5
588
5
60"
606
10
608
5
62"
626
10
628
10
65"
656
10
658
10
70"
706
10
708
10
72"
726
10
728
10
78"
786
10
788
10
Calculation
for determining largest opening of hole form WITH known wall
taper:
(((WALL TAPER X TANGENT) X 2) X WALL THICKNESS) + FACE DIAMETER
This catalog page is available as an excel speadsheet to include
large diameter opening of hole form.
