FFXI Haven - Ваш Источник #1.

If the sound test indicates no serious internal decay above ground (verified by borings when in doubt), the next step is excavating the soil to about 18 inches (450 millimeters). It may be necessary to excavate deeper in dry or porous soils, and this can be determined as the work progresses. When there is danger of toppling the pole by digging, provide temporary propping of poles. The hole should be wide enough to permit use of the borer below the ground line. Care must be taken not to cut or disturb the ground wire.

(2) Inspection. With a blunt tool, probe the surface of the pole gently below the ground line to see if the wood is intact and firm or if decay is present as evidenced by soft, spongy wood. Close attention

should be given to the vicinity of any separation checks. If the ground is wet, the wood may be soft but not decayed, so examine a sliver of the wood to see if it breaks easily or crumbles. Look and smell for preservative on the surface of the pole (a musty smell often indicates active decay). Remove as much decayed wood as possible with the spade and clean the surface with a wire brush. Open pockets of decay and determine their extent by probing. Interior decay at the ground line may be checked by taking borings.

(3) Measuring pole circumference. After removal of all decayed wood, the remaining circumference of the pole just below ground line should be measured. Deduction from this measured circumference is made for any external or internal decay pockets in order to determine whether the pole meets the minimum circumference permitted by the NESC.

(a) If the ground-line circumference is below the permissible minimum, the pole should be promptly replaced or reinforced.

(b) If the ground-line circumference is above the permissible minimum, the pole should be ground-line treated as covered in section VI.

4-16.

BACK | NEXT

Easy Access To All Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135