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Table 1: Simple Two-Bolt Strap Hold-down on Flat Surface | |||||||||||
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Nominal |
Tensile |
Stress |
Strength |
Load (lbf) |
Battery (lb) |
Strength |
Load (lbf) |
Battery (lb) |
Strength |
Load (lbf) |
Battery (lb) |
|
#8 |
0.014 |
3.85 |
85.0 |
309.1 |
15.5 |
120.0 |
436.4 |
21.8 |
|
|
|
|
#10 |
0.0175 |
3.85 |
85.0 |
386.4 |
19.3 |
120.0 |
545.5 |
27.3 |
|
|
|
|
1/4 |
0.0318 |
3.85 |
33 |
272.6 |
13.6 |
85.0 |
702.1 |
35.1 |
120.0 |
991.2 |
49.6 |
|
5/16 |
0.0524 |
3.85 |
33 |
449.1 |
22.5 |
85.0 |
1156.9 |
57.8 |
120.0 |
1633.2 |
81.7 |
|
3/8 |
0.0775 |
3.85 |
33 |
664.3 |
33.2 |
85.0 |
1711.0 |
85.6 |
120.0 |
2415.6 |
120.8 |
|
7/16 |
0.106 |
3.85 |
33 |
908.6 |
45.4 |
85.0 |
2340.3 |
117.0 |
120.0 |
3303.9 |
165.2 |
|
1/2 |
0.1419 |
3.85 |
33 |
1216.3 |
60.8 |
85.0 |
3132.9 |
156.6 |
120.0 |
4422.9 |
221.1 |
|
9/16 |
0.182 |
3.85 |
33 |
1560.0 |
78.0 |
85.0 |
4018.2 |
200.9 |
120.0 |
5672.7 |
283.6 |
|
5/8 |
0.226 |
3.85 |
33 |
1937.1 |
96.9 |
85.0 |
4989.6 |
249.5 |
120.0 |
7044.2 |
352.2 |
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Table 2: Maxiumum Battery Weights | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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|
Nominal Bolt Size (inch) |
Tensile Stress Area (inch^2) |
Stress Conc. Factor |
Grade 1 Str (ksi) |
Max Load (lbf) |
Head Circum. (inch) |
Max Force per Inch |
Strap Str (ksi) |
Strap Thick- |
Min Strap Width (inch) |
Strap Cross Section (inch^2) |
Strap Str (ksi) |
Strap Thick- |
Min Strap Width (inch) |
Strap Cross Section (inch^2) |
|
#8 |
0.014 |
3.85 |
33 |
120.0 |
0.901 |
133.16 |
33 |
0.0155 |
0.936 |
0.01454 |
20 |
0.0256 |
0.936 |
0.024 |
|
#10 |
0.0175 |
3.85 |
33 |
150.0 |
1.04876 |
143.026 |
33 |
0.0167 |
1.0896 |
0.018 |
20 |
0.0275 |
1.0896 |
0.03 |
|
1/4 |
0.0318 |
3.85 |
33 |
272.6 |
1.37 |
198.41 |
33 |
0.0231 |
1.427 |
0.033 |
20 |
0.038 |
1.427 |
0.0545 |
|
5/16 |
0.0524 |
3.85 |
33 |
449.1 |
1.57 |
286.078 |
33 |
0.033 |
1.631 |
0.054 |
20 |
0.055 |
1.631 |
0.0898 |
|
3/8 |
0.0775 |
3.85 |
33 |
664.3 |
1.766 |
376.099 |
33 |
0.0439 |
1.835 |
0.0805 |
20 |
0.0724 |
1.835 |
0.133 |
|
7/16 |
0.106 |
3.85 |
33 |
908.6 |
1.9625 |
462.966 |
33 |
0.054 |
2.039 |
0.110 |
20 |
0.0891 |
2.03896 |
0.1817 |
|
1/2 |
0.1419 |
3.85 |
33 |
1216.3 |
2.355 |
516.470 |
33 |
0.060 |
2.4468 |
0.147 |
20 |
0.0994 |
2.447 |
0.243 |
|
9/16 |
0.182 |
3.85 |
33 |
1560.0 |
2.55 |
611.465 |
33 |
0.071 |
2.65 |
0.189 |
20 |
0.1177 |
2.65 |
0.312 |
|
5/8 |
0.226 |
3.85 |
33 |
1937.1 |
2.944 |
658.053 |
33 |
0.07677 |
3.058 |
0.2348 |
20 |
0.127 |
3.058 |
0.387 |
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|
Nominal Bolt Size (inch) |
Tensile Stress Area (inch^2) |
Stress Conc Factor |
Grade 5 Str (ksi) |
Max Load (lbf) |
Head Circum (inch) |
Max Force per Inch |
Strap Str (ksi) |
Strap Thick- |
Min Strap Width (inch) |
Strap Cross Section (inch^2) |
Strap Str (ksi) |
Strap Thick- |
Min Strap Width (inch) |
Strap Cross Section (inch^2) |
|
#8 |
0.014 |
3.85 |
85 |
309.1 |
0.901 |
342.985 |
33 |
0.040 |
0.936 |
0.037 |
20 |
0.066 |
0.936 |
0.0618 |
|
#10 |
0.0175 |
3.85 |
85 |
386.4 |
1.04876 |
368.400 |
33 |
0.0430 |
1.0896 |
0.0468 |
20 |
0.071 |
1.090 |
0.077 |
|
1/4 |
0.0318 |
3.85 |
85 |
702.1 |
1.374 |
511.067 |
33 |
0.0596 |
1.427 |
0.085 |
20 |
0.0983 |
1.427 |
0.140 |
|
5/16 |
0.052 |
3.85 |
85 |
1156.9 |
1.57 |
736.868 |
33 |
0.0860 |
1.631 |
0.140 |
20 |
0.142 |
1.631 |
0.231 |
|
3/8 |
0.0775 |
3.85 |
85 |
1711.0 |
1.766 |
968.741 |
33 |
0.113 |
1.835 |
0.2074 |
20 |
0.186 |
1.835 |
0.342 |
|
7/16 |
0.106 |
3.85 |
85 |
2340.3 |
1.9625 |
1192.489 |
33 |
0.139 |
2.039 |
0.284 |
20 |
0.2296 |
2.03896 |
0.468 |
|
1/2 |
0.1419 |
3.85 |
85 |
3132.9 |
2.355 |
1330.300 |
33 |
0.155 |
2.447 |
0.379 |
20 |
0.256 |
2.447 |
0.6266 |
|
9/16 |
0.182 |
3.85 |
85 |
4018.2 |
2.551 |
1574.986 |
33 |
0.1837 |
2.650 |
0.487 |
20 |
0.303 |
2.650 |
0.804 |
|
5/8 |
0.226 |
3.85 |
85 |
4989.6 |
2.944 |
1694.984 |
33 |
0.198 |
3.058 |
0.6048 |
20 |
0.326 |
3.058 |
0.998 |
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|
Nominal Bolt Size (inch) |
Tensile Stress Area (inch^2) |
Stress Conc Factor |
Grade 8 Str (ksi) |
Max Load (lbf) |
Head Circum (inch) |
Max Force per Inch |
Strap Str (ksi) |
Strap Thick- |
Min Strap Width (inch) |
Strap Cross Section (inch^2) |
Strap Str (ksi) |
Strap Thick- |
Min Strap Width (inch) |
Strap Cross Section (inch^2) |
|
#8 |
0.014 |
3.85 |
120 |
436.4 |
0.90118 |
484.2136 |
33 |
0.0565 |
0.936 |
0.0529 |
20 |
0.0932 |
0.9363 |
0.08727 |
|
#10 |
0.0175 |
3.85 |
120 |
545.5 |
1.0488 |
520.0947 |
33 |
0.0607 |
1.0896 |
0.066 |
20 |
0.100 |
1.0896 |
0.1091 |
|
1/4 |
0.0318 |
3.85 |
120 |
991.2 |
1.374 |
721.5060 |
33 |
0.084 |
1.427 |
0.120 |
20 |
0.1389 |
1.427 |
0.198 |
|
5/16 |
0.0524 |
3.85 |
120 |
1633.2 |
1.57 |
1040.285 |
33 |
0.121 |
1.631 |
0.198 |
20 |
0.200 |
1.631 |
0.3266 |
|
3/8 |
0.0775 |
3.85 |
120 |
2415.6 |
1.766 |
1367.634 |
33 |
0.1596 |
1.835 |
0.293 |
20 |
0.263 |
1.835 |
0.483 |
|
7/16 |
0.106 |
3.85 |
120 |
3303.9 |
1.9625 |
1683.514 |
33 |
0.196 |
2.039 |
0.400 |
20 |
0.324 |
2.039 |
0.661 |
|
1/2 |
0.1419 |
3.85 |
120 |
4422.9 |
2.355 |
1878.071 |
33 |
0.219 |
2.447 |
0.536 |
20 |
0.362 |
2.447 |
0.885 |
|
9/16 |
0.182 |
3.85 |
120 |
5672.7 |
2.551 |
2223.51 |
33 |
0.259 |
2.651 |
0.688 |
20 |
0.428 |
2.651 |
1.135 |
|
5/8 |
0.226 |
3.85 |
120 |
7044.2 |
2.944 |
2392.91 |
33 |
0.2792 |
3.058 |
0.854 |
20 |
0.4606 |
3.058 |
1.409 |
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Table 3: Hold-down Bolt Size for Rack or Box-Mounted Box | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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|
Nominal Size (inch) |
Tensile |
Stress |
Strength |
Load (lbf) |
Battery (lb) |
Strength |
Load (lbf) |
Battery (lb) |
Strength |
Load (lbf) |
Battery (lb) |
|
#8 |
0.014 |
3.85 |
33 |
120.0 |
15.0 |
85.0 |
309.1 |
38.6 |
120.0 |
436.4 |
54.5 |
|
#10 |
0.0175 |
3.85 |
33 |
150.0 |
18.8 |
85.0 |
386.4 |
48.3 |
120.0 |
545.5 |
68.2 |
|
1/4 |
0.0318 |
3.85 |
33 |
272.6 |
34.1 |
85.0 |
702.1 |
87.8 |
120.0 |
991.2 |
123.9 |
|
5/16 |
0.0524 |
3.85 |
33 |
449.1 |
56.1 |
85.0 |
1156.9 |
144.6 |
120.0 |
1633.2 |
204.2 |
|
3/8 |
0.0775 |
3.85 |
33 |
664.3 |
83.0 |
85.0 |
1711.0 |
213.9 |
120.0 |
2415.6 |
301.9 |
|
7/16 |
0.106 |
3.85 |
33 |
908.6 |
113.6 |
85.0 |
2340.3 |
292.5 |
120.0 |
3303.9 |
413.0 |
|
1/2 |
0.1419 |
3.85 |
33 |
1216.3 |
152.0 |
85.0 |
3132.9 |
391.6 |
120.0 |
4422.9 |
552.9 |
|
9/16 |
0.182 |
3.85 |
33 |
1560.0 |
195.0 |
85.0 |
4018.2 |
502.3 |
120.0 |
5672.7 |
709.1 |
|
5/8 |
0.226 |
3.85 |
33 |
1937.1 |
242.1 |
85.0 |
4989.6 |
623.7 |
120.0 |
7044.2 |
880.5 |