Tower Shop Fabrication Time
02/26/2008
(Does not include furling system or augmenter components such as welding on the furling standoff support brackets.)
Does not include the strut brace fabrication details.
Does not include drilling holes in the legs for the clamp plates.
Does not include drilling holes in the cross braces or cross bars for attachment to legs.
Does not include holes in top cross braces for strut bars.
1) Tubing Supports 4” x 4” x ½” steel angle, 118 pieces Drawing D-02
117 cuts @ 3 minutes each = 351 cutting minutes
12” weld per piece x 118 pcs. = 1416 welding minutes
2) 1/8” Fabreeka Pad for bearings, 130 pieces, Drawing D-11A
Cut to dimension and drill or punch holes
130 cuts @ 3 minutes each = 390 cutting minutes
3) Thrust bearing Support 4” x 4” x ½” x 8” long steel angle Drawing D-02
11 cuts @ 3 minutes each = 33 cutting minutes
48 holes @ 1 minute each = 48 drilling minutes
24” weld per piece x 12 pieces = 288 welding minutes
4) ½” Fabreeka Pad for legs, 8 pieces, Drawing D-14A
Cut to dimension and drill or punch holes
8 cuts @ 8 minutes each = 64 cutting minutes
5) Bearing Plates for rotors, 8” w x 11” l x ½” t, 72 pieces, Drawing D-04
71 cuts @ 3 min each = 213 cutting minutes
6 holes x 72 plates x 1 minute= 432 drilling minutes
16” weld x 72 plates x 1” min = 1152 welding minutes
6) Bearing plates above thrust bearing support and top cross bar, 24 pieces, 8”W x 7 ½” L x ½” T, Drawing D-13A
24 cuts @ 3 min each= 72 cutting minutes
4 holes x 24 plates x 1 min= 96 drilling minutes
16” weld x 24 plates x 1” min= 384 welding minutes
7) Foot Plates, 12” x 12” x 1”, 8 pieces, Drawing D-05
8 cuts @ 12 minutes each= 96 cutting minutes
4 holes/plate x 8 plates x 3 min/hole= 96 drilling minutes
8) Generator Mounting Plates 12”W x 32”L x ½”T, 12 pieces, no drawing
12 cuts @ 6 min each= 72 cutting minutes
6 holes/plate x 12 plates x 1 min/hole= 72 drilling minutes
24” weld x 12 plates x 1”/min= 288 welding minutes
9)Leg joint plate 7” x 7” x Y” thick, 24 pieces, no drawing
24 cuts @ 4 min/cut= 96 cutting minutes
4 holes/plate x 24 plates x 1 min/hole= 96 drilling minutes
16” of weld x 24 plates = 384 welding minutes
10) End clamp plates 4”W x 8”L x Y” thick, 112 pieces, no drawing
112 cuts @ 2 min/cut= 224 cutting minutes
2 holes/plate x 112 plates x 1min/hole= 224 drilling minutes
11) Straddle clamp plates 4”W x 12”L x Y” thick, 144 pieces, no drawing
144 cuts @ 2 min/cut= 288 cutting minutes
3 holes/plate x 144 plates x 1 min/hole= 532 drilling minutes
12) Cable Stay Anchors, 3”W x 6”L x 3/8” T, 20 pieces, no drawing
20 cuts @ 2 min/cut= 40 cutting minutes
2 holes/plate x 20 plates x 1 min/hole= 40 drilling minutes
8” weld/plate x 20 plates= 160 welding minutes
13) Bearing Plate Gussets, 2” x ½” flat bar, 24 pieces, 32” long, no drawing
24 cuts @ 2 min/cut= 48 cutting minutes
64” weld x 24 pieces x 1”/min= 1536 welding minutes
14) Leg Gussets, 4”W x ½”T x 12”L flat bar steel, 32 pieces, no drawing
32 cuts @ 3 min/cut= 96 cutting minutes
144” weld/leg x 8 legs x 1”/min 1152 welding minutes
15) Tower leg holes for clamp and straddle plates, no drawing
56 end clamp holes x 1 min/hole= 56 drilling minutes
38 straddle clamp holes x 1 min/hole = 38 drilling minutes
Cutting Minutes Drilling minutes Welding minutes
1) 351 1416
2) 390
3) 33 48 288
4) 64
5) 213 432 1152
6) 72 96 384
7) 96 96
8) 72 72 288
9) 96 96 384
10) 224 224
11) 288 532
12) 40 40 160
13) 48 1536
14) 96 1152
15) 94
2083 1730 6760
176 hours of shop fabrication time for the tower structure only.
