 | 1906 - 1580 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...of 20 or 30 feet. 4. Short vertical rods should be erecled along minor pinnacles and connected with the upper horizontal conductor. 5. All roof metals,... | |
 | Royal Meteorological Society (Great Britain) - 1905 - 380 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...suitable position on the roof ; (6) at or near the ground line. 3. The upper horizontal conductor should be fitted with aigrettes or points at intervals of 20... | |
 | 1905 - 868 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...ridge, or any other suitable position on the roof ; (b) at or near the ground line. 3. The upper horizontal conductor should be fitted with aigrettes... | |
 | Killingworth Hedges - 1905 - 156 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...ridge, or any other suitable position on the roof; (b) at or near the ground line. 3. The upper horizontal conductor should be fitted with aigrettes or... | |
 | Killingworth Hedges - 1905 - 156 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...Horizontal conductors should connect all the vertical rods («) along the ridge, or any other suitable position on the roof ; (b) at or near the ground line.... | |
 | American Geographical Society of New York - 1906 - 906 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...ridge, or any other suitable position on the roof; (b) at or near the ground-line. 3. The upper horizontal conductor should be fitted with aigrettes,... | |
 | Alfred Judson Henry - 1906 - 28 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...ridge, or any other suitable position on the roof; (b) at or near the ground. 3. The upper horizontal conductor should be fitted with aigrettes or points... | |
 | 1906 - 388 Seiten
...lightning rods, one on each side, should be provided, extending from the top of each tower, spire, or high chimney stack by the most direct course to...connect all the vertical rods (a) along the ridge, 01 any other suitable position on the roof; (6) at or near the ground. 3. The upper horizontal conductor... | |
 | Alexander Russell - 1908 - 296 Seiten
...flash from one conductor to the other and as a partial protection also for the space between the two. 3. The upper horizontal conductor should be fitted...intervals of 20 or 30 feet. 4. Short vertical rods also should be erected along minor pinnacles, and connected with the upper horizontal conductor. 5.... | |
 | Alexander Russell - 1908 - 292 Seiten
...is a straight run for the conductor there is no need to keep it away from the surface of the wall. 2. Horizontal conductors should connect all the vertical rods (a) along the ridge, (6) at or near the ground line. This recommendation of the Committee was probably suggested to obviate... | |
| |
... (3) The upper horizontal conductor should be fitted with aigrettes or points, at intervals of 20 or 30 feet. (4) Short vertical rods should be erected along minor pinnacles and connected with the upper horizontal conductor. (5) All roof metals, such... 
