Axial and rotational stiffness model of metal-plate-connected wood truss joints

An analytical model that predicts the axial and rotational stiffness values of metal-plate-connected wood truss joints is developed by considering a p late tooth as a cantilever beam in an elastic foundation. Given lumber spec ific gravity, moisture content, plate and tooth geometry, and loading condi tions, the model predicts axial and rotational stiffness values. A total of 33 actual tension splice and heel joints were tested to validate the predi ctions of the model. To test the scope of the model, joints were fabricated from wood specific gravity ranging from 0.30 to 0.70, and moisture content ranging from 1 to 19%. Heel joint top chord slopes were 3.5 on 12 and 5 on 12. The joints were tested by applying concentric and eccentric loads. The model predicts within 10% of experimental values.