Abstract: As part of a parent study of possible environmental effects on the long‐term load‐carrying performance of structural lumber, the material characteristics of a lumber sample are evaluated in several hygrothermal states. The ...

Abstract: An existing four‐element viscoelastic model is used to model the creep response of lumber as a function of load and is modified to account for thermal and moisture effects, including mechanosorptive effects (i.e., the ...

Abstract: A critical strain‐energy‐density failure criterion is introduced to describe the load‐duration (creep‐rupture) behavior of structural lumber. From extensive ramp, constant, and step‐constant load tests in various constant ...

Abstract: The effect of environmental histories on the load‐duration behavior of structural lumber is presented. Select Structural Douglas‐fir nominal 2‐by‐4 lumber was tested in bending for this investigation. Constant load tests ...