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Science Fair Projects - List of masts (1517 words) |
 | Two shorter towers may be a better option the one taller one, for example, or a higher tower might not be useful if the signal is blocked by terrain nor if all the listeners are in a concentrated area and a higher tower cannot pay for itself. |
| The Petronius Compliant Tower, an oil platform) at 2100 ft or 640 m (to the top of the spire) is the tallest non-guyed structure in existence but it is mostly underwater (taller than all but the Warsaw radio mast). |
| The CN Tower at 553.33 metres (1,815 ft 4.5 in) is the tallest non-guyed structure on land, though it is shorter than many of the guyed towers. |
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