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1 Conductor weight â Sag of the conductor is directly proportional to its weight. The weight of the conductors is increased due to ice loading. 2  Span â Sag is directly proportional to the square of the span length. Longer span gives more sag.  Tension -The sag is inversely proportional to the tension in the conductor.
For each of the techniques highlighted, various factors can affect Tg. For DSC, the heating rate and sample heat history are a couple of factors that may affect the test result. For materials that have broad Tgs, DSC may not be sensitive enough to show a large enough transition for accurate calculation purposes.