In mechanically jointed plywood timber beams, the deformation of the connection has an important influence on the stiffness of the beam and the distribution of internal forces. To quantify this influence, the mechanical behavior of the connection, expressed by its non-linear load-slip relationship, is required. In the linear elastic range, load and slip are related by the slip modulus. This study deals with the analytical determination of the slip modulus of nailed connections based on the theory of beam on elastic foundation, in which the wood foundation modulus was estimated through the embedment test. In general, the conclusion is that this model is adequate for the description of the behavior of the connection in the linear limit range and its main parameter is the wood foundation modulus, which needs further investigation regarding data for tropical species of wood and plywood. © 2009 Elsevier Ltd. All rights reserved.23827312737Girhammar, U.A., Gopu, K.A., Composite beam-columns with interlayer slip - exact analysis (1993) J Struct Eng, 119 (4), pp. 1265-1282prEN 1995-1-1 (2003) EUROCODE 5design of timber structures - part 1-1: General rules and rules for buildings, , European Committee for Standardization, Brussels, Belgium;Kreuzinger H. Mechanically jointed beams and columns. In: Blass HJ et al., editors. Timber engineering - step 1. Almere (Netherlands): Centrum Hout1995. p. B11-1-8Santana, C.L.O., Mascia, N.T., Stiffness of nailed connections in wooden beams (1998) Proceedings of the 5th world conference on timber engineering, 1, pp. 810-811. , Montreux, SwitzerlandAugustJohansen KW. Theory of timber connections. Bern (Switzerland): International Association of Bridge and Structural Engineering1949 [Publ. 9]Kuenzi EW. Theoretical design of a nailed or bolted joint under lateral load. Forest Products Laboratory, Forest Service, United States Department of Agriculture, Madison, USA1955 (Rep. D1951). 31 pHetenyi, M., (1946) Beams on the elastic foundation, , University of Michigan Press, MichiganFoschi R, O., Load-slip characteristics of nails (1974) Wood Sci, 7 (1), pp. 69-76Patton-Mallory, M., Pellicane, P.J., Smith, F.S., Modeling bolted connections in wood: review (1997) J Struct Eng, 123 (8), pp. 1054-1062ABNT/NBR 7190 - Projeto de Estruturas de Madeira (Wood structures design). Rio de Janeiro, Brazil1997Riley, G., Gebremedhin, K.G., Axial and rotational stiffness model of metal-plate-connected wood truss joints (1998) Proceedings of the 5th world conference on timber engineering, 2, pp. 153-160. , Montreux, SwitzerlandAugustWilkinson, T.L., Analysis of nailed joints with dissimilar members (1972) J Struct Div, 98 (ST9), pp. 2005-2013Wilkinson, T.L., Theoretical lateral resistance of nailed joints (1971) J Struct Div, 97 (ST5), pp. 1381-1398Riley, G., Gebremedhin, K.G., An empirical model for predicting the foundation modulus of wood (1998) Proceedings of the 5th world conference on timber engineering, 1, pp. 862-863. , Montreux, SwitzerlandAugustSantana, C.L.O., Mascia, N.T., Calil Jr., C., Analytical determination of the slip modulus of nailed wood connections (2008) Proceedings of the 10th world conference on timber engineering, 1, pp. 1-10. , Miyazaki, JapanJuneStamato, G.C., Calil Jr., C., Resistência ao embutimento da madeira compensada (Embedment strength for plywood) (2002) Cadernos de Engenharia de Estruturas, (18), pp. 49-76. , University of Sao Paulo, Sao Carlos;Porteous, J., Kermani, A., (2007) Structural timber design to Eurocode 5, , Blackwell