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B-174
Pipe Straps, Conduit Clamps and Hangers
Metal Framing & Cable Tray — Superstrut
®
Metal Framing System
CHAIR
NO. BARE PIPE SIZE
C-789
1" COV. 25
C-789A
1
1
⁄2" COV. 38
C-789B
2" COV. 51
C-789C
2
1
⁄2" COV. 64
C-789D
3" COV. 76
C-789E
4" COV. 102
1
25
⁄32 2 — — — — — —
— 2
1
⁄2
3
⁄4–3
3
⁄4–2
1
⁄2
3
⁄4–1
3
⁄4 — — —
— 3 20–80 20–65 20–40 — — —
— 3
1
⁄2 — — — — — —
1 4 4–6 3–5 2–4
3
⁄4–1
1
⁄2 — —
— 5 100–150 80–125 50–100 20–40 — —
— 6 — — — — — —
2 8 8 6–8 5–8 2–5 2–6 4–5
— 10 200 150–200 125–200 50–125 50–150 100–125
3 12 10–12 10–12 10–12 6–8 8 6–8
— 14 250–300 250–300 250–300 150–200 200 150–200
4 16 14–18 14–18 14–18 10–16 10–14 10–12
— 18 350–450 350–450 350–450 250–400 250–350 250–300
— 20 — — — — — —
5 24 20 20 18–20 18–20 16–18 14–18
5 600 500 500 450–500 450–500 400–450 350–450
6 30 24 24 24 24 20–24 20–24
6 750 600 600 600 600 500–600 500–600
7 36 30 30 30 30 30 28
— 900 750 750 750 750 750 700
7 42 40 36 36 36 36 32
— 1,050 1,000 900 900 900 900 800
• Material: Carbon Steel Chair and
Axle with Cast Iron Pipe Roll.
Use a Figure 17 when a Cast Iron
Chair is required.
Do not exceed 450° F/232° C at the
contact point to the roll.
• Compliance: Federal Specification
A-A-1192A Type 44, MSS-SP-69
Type 44.
• Finish: Black (add suffix “-B”).
Electro-Galvanized (add suffix
“-HDG”).
For pipe with insulation and a pipe
covering protection saddle,
the S-730-C will have to be
oversized to suit.
Please see the Table below showing
the correct sizing for insulated pipe.
• Ordering: Specify chair number,
catalog number and finish.
.................................... Specifications ...................................
CAT. NO.
CHAIR
NO.
MAX. LOAD
(LBS.)
BARE PIPE
SIZE (IN.)
DIMENSIONS (IN.)
WT. EACH
(LBS.)
C D E J K M N O P S
S-730-C-1A 1
25
⁄32 390 2 6 8
1
⁄2 1
1
⁄2 6
1
⁄2 1
1
⁄4 2
47
⁄64 3
1
⁄2 4
1
⁄8 7.0
2
1
⁄2 1
3
⁄4
3 2
1
⁄8
3
1
⁄2 2
3
⁄8
S-730-C-1 1 950 4 6 10
1
⁄8 2
3
⁄4 8 1
1
⁄4
23
⁄8
47
⁄64 4
3
⁄4 4
3
⁄4 10.5
5 3
3
⁄8
6 3
7
⁄8
S-730-C-2 2 2,100 8 7 9 5
1
⁄8 4 1
3
⁄8
33
⁄4
11
⁄16 7 5 16.5
10 6
1
⁄4
S-730-C-3 3 3,075 12 8 11 7
3
⁄8 5
3
⁄4 1
3
⁄8
43
⁄4
11
⁄16 9 6 26.8
14 8
S-730-C-4 4 4,980 16 9 12
1
⁄2 8
7
⁄8 6
3
⁄4 1
1
⁄2
43
⁄4
13
⁄16 10 6
1
⁄2 40.5
18 10
20 11
S-730-C-5 5 6,100 24 8
7
⁄8 13
3
⁄4 13 7
1
⁄2 1
5
⁄8
47
⁄8
13
⁄16 11
1
⁄2 6
3
⁄4 51.0
S-730-C-6 6 7,500 30 11 17
1
⁄4 16
1
⁄4 10 1
5
⁄8 5
5
⁄8
13
⁄16 14
3
⁄4 8 89.8
S-730-C-7 7 12,000 36 12 20 20 12 1 1 5
7
⁄8
11
⁄16 17 9 145
42 23
1
⁄8
C
S
K
D
J
P
K
D
J
P
C
S
O
O
E
E
N
N
Chair No. 1A & 1
Chair No. 2 thru 6
S-730-C
S-730-C — Chair and Roll
Designed for longitudinal movement of pipe where vertical adjustment is
not required. Because the chair is made of steel, it can be either welded or
bolted in position.