PWS_Exhibit_B_Pole_Circumference_Safety_Factors.docx
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- Wood Pole Inspection
- Solicitation number
- DE-SOL-0005899
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Attachment B
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Other files
| File | Type | Posted |
|---|---|---|
| WoodPoleLocationMaps.zip | ZIP file | |
| Sol_Face_Page.pdf | ||
| DE-SOL-0005899.docx | DOCX document | |
| PWS_SNR_Wood_Pole_Inspection.docx | DOCX document | |
| PWS_Exhibit_A_Required_Pole_List.xlsx | XLSX spreadsheet | |
| PWS_Exhibit_C_Transmission_Line_Inspection_Report.pdf |
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Exhibit B
WOOD UTILITY POLE INSPECTION AND TREATMENT SERVICES,
TRANSMISSION AND DISTRIBUTION LINES
WITHIN THE SIERRA NEVADA REGION
Table 1
POLE CIRCUMFERENCE SAFETY FACTORS (SF)
Original Circumference (inches)
SF4
Reduced Circumference
SF 3.5
SF 3.0
SF 2.65
SF 2.5
SF 2.0
28.7
27.3
26.1
25.6
23.8
29.7
28.2
27.0
26.5
24.6
30.6
29.1
27.9
27.4
25.4
31.6
30.0
28.8
28.2
26.2
32.5
30.9
29.6
29.1
27.0
33.5
31.8
30.5
29.9
27.8
34.4
32.7
31.4
30.8
28.6
35.4
33.6
32.3
31.6
29.4
36.3
34.5
33.1
30.2
37.3
35.4
34.0
33.3
31.0
38.3
36.3
34.9
34.2
31.8
39.2
37.3
35.7
35.1
40.2
38.2
36.6
35.9
33.3
41.1
39.1
37.5
36.8
34.1
42.1
40.0
38.4
37.6
34.9
43.0
40.9
39.2
38.5
35.7
44.0
41.8
40.1
39.3
36.5
45.0
42.7
41.0
40.2
37.3
45.9
43.6
41.8
41.0
38.1
46.9
44.5
42.7
41.9
38.9
47.8
45.4
43.6
42.7
39.7
48.8
46.3
44.5
43.6
40.5
49.7
47.2
45.3
44.5
41.3
50.7
48.2
46.2
45.3
42.1
51.6
49.1
47.1
46.2
42.9
52.6
50.0
47.9
47.0
43.7
53.6
50.9
48.8
47.9
44.4
54.5
51.8
49.7
48.7
45.2
55.5
52.7
50.6
49.6
46.0
56.4
53.6
51.4
50.4
46.8
57.4
54.5
52.3
51.3
47.6
ALLOWABLE REDUCED CIRCUMFERENCE SAFETY FACTORS
No single pole to have SF less than 2.65.
No H-structure to have SF less than 2.65 and no pole to have SF less than 2.
For H-structures, add the SF for each pole together and divide by 2 to obtain the structure SF.
For tension-type structures (dead ends), no pole to have SF less than 2.65.
Table 2
Reduction in Measured Circumferences to Compensate for External Pockets
Measured Circumferences of Pole (inches)
Width of Pocket (inches)
Depth of Pocket (inches)
30 to 40
40 to 50
50 to 60
Table 3
Reduction in Measured Circumferences to Compensate for Hollow Heart
Measured Circumferences of Pole
Minimum Thickness of Shell (inches)
3 1/2
4 1/2
30 to 40
Table 4
Reduction in Measured Circumferences to Compensate for Enclosed Pockets
Measured Circumferences of Poles (inches)
Diameter of Pocket (inches)
Measured Thickness of Shell (inches)
30 to 40
Table 5
Reduction in Measured Circumferences to Compensate for External Pockets
Measured Circumferences of Pole (inches)
Width of Pocket (inches)
Depth of Pocket (inches)
30 to 40
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