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Place a bathroom scale under the center of the door to get the weight of the door.
Then use this chart to determine the correct springs for the door.
| 7' door weight |
8' door weight |
Spring(s) to use |
| 77lbs |
88lbs |
(.207 x 1-3/4 x 26) |
| 90lbs |
103lbs |
(.218 x 1-3/4 x 29) |
| 108lbs |
123lbs |
(.225 x 1-3/4 x 28) |
| 122lbs |
139lbs |
(.234 x 1-3/4 x 30) |
| 138lbs |
158lbs |
(.243 x 1-3/4 x 32) |
| 152lbs |
174lbs |
(.250 x 1-3/4 x 33) |
| 154lbs |
176lbs |
(.207 x 1-3/4 x 26) & (.207 x 1-3/4 x 26) |
| 167lbs |
191lbs |
(.207 x 1-3/4 x 26) & (.218 x 1-3/4 x 29) |
| 180lbs |
206lbs |
(.218 x 1-3/4 x 29) & (.218 x 1-3/4 x 29) |
| 185lbs |
211lbs |
(.207 x 1-3/4 x 26) & (.225 x 1-3/4 x 28) |
| 198lbs |
226lbs |
(.218 x 1-3/4 x 29) & (.225 x 1-3/4 x 28) |
| 199lbs |
227lbs |
(.207 x 1-3/4 x 26) & (.234 x 1-3/4 x 30) |
| 212lbs |
242lbs |
(.218 x 1-3/4 x 29) & (.234 x 1-3/4 x 30) |
| 215lbs |
246lbs |
(.207 x 1-3/4 x 26) & (.243 x 1-3/4 x 32) |
| 216lbs |
247lbs |
(.225 x 1-3/4 x 28) & (.225 x 1-3/4 x 28) |
| 228lbs |
261lbs |
(.218 x 1-3/4 x 29) & (.243 x 1-3/4 x 32) |
| 229lbs |
262lbs |
(.207 x 1-3/4 x 26) & (.250 x 1-3/4 x 33) |
| 230lbs |
263lbs |
(.225 x 1-3/4 x 28) & (.234 x 1-3/4 x 30) |
| 242lbs |
277lbs |
(.218 x 1-3/4 x 29) & (.250 x 1-3/4 x 33) |
| 244lbs |
279lbs |
(.234 x 1-3/4 x 30) & (.234 x 1-3/4 x 30) |
| 246lbs |
281lbs |
(.225 x 1-3/4 x 28) & (.243 x 1-3/4 x 32) |
| 260lbs |
297lbs |
(.225 x 1-3/4 x 28) & (.250 x 1-3/4 x 33) |
| 260lbs |
297lbs |
(.234 x 1-3/4 x 30) & (.243 x 1-3/4 x 32) |
| 274lbs |
313lbs |
(.234 x 1-3/4 x 30) & (.250 x 1-3/4 x 33) |
| 276lbs |
315lbs |
(.243 x 1-3/4 x 32) & (.243 x 1-3/4 x 32) |
| 290lbs |
331lbs |
(.243 x 1-3/4 x 32) & (.250 x 1-3/4 x 33) |
| 304lbs |
347lbs |
(.250 x 1-3/4 x 33) & (.250 x 1-3/4 x 33) |
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