Furling Shop Fabrication Time
4/15/08
(1) Furling system stand off, 4”x 4”x ¼” steel tubing, 26” long
24 cuts at 3 minutes per cut= 72 minutes
24 holes at 2 min/hole= 48 minutes (tower mount holes)
4 holes x 24 pieces x 1 hole/min= 96 minutes (rail mount plates)
(2) Strut bar to brace tower top leg 4”x 4”x ¼” steel angle
4 pieces x 2 holes/piece x 2 min/hole= 16minutes drilling
(3) Tower top leg 4”x 4”x ¼” steel tubing, 8’ long
Joint plate weld, 16” x 4 x 1”/min= 64 minutes weld time
Clamp plate holes 4 holes x 3 min/hole= 12 min
(4) Tubing supports, 4”x 4”x ½” steel angle, 4” long, same as tower pieces
24 cuts at 3 min/cut= 72 minutes
12” weld x 24 pieces x 1”/min= 288 min
(5) Garage channel mount plate 2” x ¼” x 8’ long (note 1)
12 pieces x 2 holes x 1 min/hole= 24 min
(6) Garage channel mount plate 2” x ¼” x 10’ long (note 1)
18 pieces x 2 holes x 1 min/hole= 36 min
(7) Bearing mount plates 4” x ½” x 8” long, see detail drawing
18 cuts x 2 minutes /cut= 36 minutes
18 pieces x 12” weld x 1”/min= 216 minutes
18 pieces x 4 holes x 2 min/hole= 144 minutes
18 pieces x 1 hole and slot cut x 4 min/slot= 72 minutes
(8) End clamp plate 4”x 8” x Y” thick, same as tower pieces
16 cuts at 3 min each= 48 minutes
16 plates x 2 holes/plate x 2 min/hole= 96 minutes
(9) Panel Cross Rails 1 ½” x 1/8”, 9’4” long,
48 cuts to 9’4” x 2 min/cut= 96 minutes
9” of weld per rail x 48 rails x 1”/min= 432 minutes
28 holes/panel x 3 panels x 1 min/hole= 84 minutes
(10) Panel Side Rails 2” x ¼” steel angle, 5’ long
15 cuts x 2 min/cut= 30 minutes
20 axles/panel x 4 holes x 3 panels x 1 hole/minute= 240 minutes
4 axles/panel x 4 holes x 3 panels x 1 hole/min= 48 minutes
(11) Chain end plate, #35 chain
12 pieces 4 holes/plate x 1 min/hole= 48 minutes
(12) Furling panel counter weight, 6 each of 6” pipe, 24” long, with chain attachment bar and hole to fill pipe.
6 cuts x 4 min/cut= 24 minutes to cut pipe
12 cuts x 3 min/cut= 48 minutes to cut top and bottom plate
12 cuts x 2 min/cut= 24 minutes for chain attachment plates
6 holes x 4 min/hole= 24 minutes drilling fill holes
12 holes x 3 min/hole= 24 minutes drilling chain attachment holes
12 welds x 19” x 1”/min= 228 minutes end plate welds
12 welds x 15” x 1”/min= 180 minutes chain attachment plates
Note 1: Need detail of garage rail mounting to determine holes to be drilled in this rail and time in shop fabrication.
Shop Fabrication Time by operation
Cutting Drilling Welding
(1) 72 144
(2) 16
(3) 12 64
(4) 72 288
(5) 24
(6) 36
(7) 36 216 216
(8) 48 96
(9) 96 84 432
(10) 30 288
(11) 48
(12) 72 48 408
426 1012 1408
2846 minutes of shop fabrication time on the furling system
47 hours of shop fabrication time
Does not include vertical webs for furling panels and some drilling for garage rail mounting.
