The paper presents new data of the glulam tensile strength. Using scientific computing, these data were determined with simulations. The basis are numerous realisations of simulated tension tests. The data cover the tensile strength of glulam members with varying lengths (0.15 – 108 m) and depths (0.12 – 0.6 m). Based on the data, a kℓ-factor is proposed, which is suitable to compensate length effects for tension members with a length up to 108 m. In comparison with current provisions, the compensation would be conservative. This is shown with reliability analyses performed as Monte Carlo simulations.