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Table 2: AutoTight® Holdown
System
Bearing Plates and
Capacitiesą |
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Bearing Plate3,4 |
Min. Plate Thickness |
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Model |
Capacity2 |
Plate Dimensions T X W X L |
IBC 2003 |
1997 UBC |
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S4 |
3,606 |
3/16" X 2-1/2" X 2-1/2" |
0.140 |
0.121 |
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S5 |
5,625 |
1/4" X 3" X 3" |
0.206 |
0.178 |
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S8 |
8,125 |
3/8" X 3-1/4" X 4" |
0.338 |
0.292 |
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S10 |
10,156 |
1/2" X 3-1/4" x 5" |
0.469 |
0.406 |
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S12 |
12,188 |
5/8" X 3-1/4" X 6" |
0.601 |
0.521 |
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S14 |
14,219 |
3/4" X 3-1/4" X 7" |
0.700 |
0.606 |
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S16 |
16,250 |
1" X 3-1/4" X 8" |
0.832 |
0.720 |
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S19 |
19,688 |
1" X 3-1/2" X 9 |
0.963 |
0.834 |
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S22 |
21,875 |
1-1/4" X 3-1/2" X 10" |
1.095 |
0.948 |
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S24 |
24,063 |
1-1/4" X 3-1/2" X 11" |
1.227 |
1.063 |
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S26 |
26,250 |
1-1/2" X 3-1/2" X 12" |
1.318 |
1.141 |
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S28 |
28,438 |
1-1/2" X 3-1/2" X 13" |
1.449 |
1.255 |
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L21 |
21,875 |
5/8" X 5" X 7" |
0.659 |
0.571 |
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L25 |
25,000 |
3/4" X 5" X 8" |
0.791 |
0.685 |
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L28 |
28,125 |
1" X 5" X 9" |
0.922 |
0.799 |
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L32 |
32,813 |
1" X 5" X 11" |
1.186 |
1.027 |
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1. Capacities are in Pounds Force (lbf). For SI: 1 inch = 25.4mm.
1lbf = 4.45N, 1 psi = 6.89 kPa.
2. The capacity is limited by the bearing area Fc = 625 psi (d.
fir-larch). For Southern Pine multiply by 0.904 (565/625 psi.) For
Spruce-Pine-Fir (SPF) multiply by 0.68. (425/625 psi.). For Hem-Fir
(HF) multiply listed by 0.65) (405/625)
3. Bearing Plate Material conforms to ASTM A36
4. Bending calculations assume the bearing plate is supported at the
ends.
5. Std Hole Size-S4-5 = 5/8", S8-16= 1", S19-S28 and L21-L32 =
1-1/4. Specify other sizes as needed. |
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CAT
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Copyright 2005
Commins Manufacturing, Inc., Friday Harbor, WA 98250, Tel (360) 378-9484 |
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AutoTight® Rod Holdown Systems and components are covered by one or more
of the following U.S. Patents 6,390,747; 6,585,469; 6,625,945, other
patents both foreign and domestic are pending. |
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