Methods are available for predicting the directional properties of glass-cloth plastic laminates from a knowledge of the properties associated with their natural axes. The mechanical properties of cross-laminated or composite laminates may also be calculated from the basic properties of parallel laminates made of the component fabrics. Tests at the Forest Products Laboratory have shown that the suggested methods are reasonably correct for the range of glass-cloth plastic laminates presently being used in aircraft.

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