The strength of glulam beams with holes - A survey of tests and calculation methods

A compilation of available test results relating to the strength of glulam beams with holes is presented. A total of 182 individual tests from 8 different sources are described concerning material, test setup and recorded crack loads and failure loads. A brief description of some available methods for strength analysis of timber is given and specific calculation approaches for the strength of glulam beams with holes are compiled. Design rules according to some European codes are reviewed and compared to experimental test results. Fundamentally different design approaches are found among the reviewed codes and the comparison reveals significant discrepancies between the predicted strengths according to the different codes. (Less)

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