Hanger Span
|
Deflection Criteria
|
||||||
L/350*
|
L/450* |
L/550* |
|||||
ft |
m |
lbs |
kg |
lbs |
kg |
lbs |
kg |
5 |
1.524 |
1100 |
499 |
950 |
431 |
700 |
317 |
6 |
1.829 |
1100 |
499 |
950 |
431 |
700 |
317 |
7 |
2.133 |
1050 |
476 |
875 |
397 |
500 |
227 |
8 |
2.438 |
1050 |
476 |
775 |
351 |
500 |
227 |
9 |
2.743 |
950 |
431 |
675 |
306 |
425 |
193 |
10 |
3.048 |
850 |
385 |
650 |
295 |
425 |
193 |
11 |
3.353 |
700 |
317 |
550 |
250 |
350 |
159 |
12 |
3.658 |
550 |
240 |
450 |
204 |
300 |
136 |
13 |
3.962 |
500 |
227 |
385 |
175 |
250 |
113 |
14 |
4.267 |
435 |
197 |
300 |
136 |
250 |
113 |
15 |
4.572 |
350 |
159 |
250 |
113 |
200 |
90 |
16 |
4.877 |
335 |
152 |
250 |
113 |
200 |
90 |
17 |
5.181 |
280 |
127 |
175 |
79 |
150 |
68 |
18 |
5.486 |
265 |
120 |
175 |
79 |
150 |
68 |
19 |
5.791 |
230 |
104 |
150 |
68 |
125 |
56 |
20 |
6.096 |
210 |
95 |
150 |
68 |
125 |
56 |
21 |
6.401 |
195 |
88 |
125 |
57 |
125 |
56 |
22 |
6.706 |
175 |
79 |
125 |
57 |
100 |
45 |
23 |
7.010 |
160 |
73 |
125 |
57 |
100 |
45 |
24 |
7.315 |
145 |
66 |
100 |
57 |
75 |
34 |
0.017 x total mass = maximum effort (in lbf) required to overcome inertia. Effort required to sustain movement is generally 0.35 x effort to overcome inertia e.g.,
250 lb. (113 kg) mass x 0.017 = 4.25 lbf (1.9 kg) to overcome inertia
4.25 (1.9 kg) x 0.35 = 1.48 lbf (0.67 kg) to sustain movement