On Sat, 10 Nov 2012 00:41:31 +0000, Danny D. wrote:

Here are the particulars:
1. Old & new spring ID = 2.0 inches 2. Old & new wire gauge = 0.2343" &
0.250"
3. Old & new length = 26.5" & 36"
4. Old & new wind = right hand wind 5. Door height = 7'
6. Track radius = 13" (only affects the duty cycle)
7. Door weight = unknown 8. Ends = standard cones 9. Drum = 4.0 inches
diameter 10. Bearing-to-drum distance = 60"-18"=42 inches 11. Spring
stretch ~= 36" + 9 turns = 38.25 inches 12. Old & new duty cycle = ?
cycles & 34000 cycles 13. Number of cycles per day ~= 2 14. Door width =
8 feet 15. Total cost (so far) ~= $75

I'm getting estimates in the $165 to $180 range for the installation
(with bar).

The door is apparently 135 pounds.