Does anyone know a good source for how much vertical deformation occurs specifically due to wood studs loading plates?
ASTM D245 establishes Fc perp by compressing a 2" wide steel plate on a 2"x2"x6" wood specimen and recording the stress at 0.04" deformation. NDS states the deformation at a stress of 0.73 x Fc perp = 0.02". NDS states "For the same stress, deformation of a joint consisting of two wood members both loaded perpendicular to grain will be approximately 2.5 times that of a metal to wood joint." I remember reading an estimation method out on the interwebs that suggested a stud bearing on a plate would experience approximately 1.75 times that of a metal to wood joint, which seems reasonable to me, but I can't find it now.
Typically plates in my structures average about 0.73 times their capacity when fully loaded, and both top and bottom plates contribute, so I'm thinking my deformation per floor due to plate crushing is like 0.02" x 2 x 1.75 = 0.07".
ASTM D245 establishes Fc perp by compressing a 2" wide steel plate on a 2"x2"x6" wood specimen and recording the stress at 0.04" deformation. NDS states the deformation at a stress of 0.73 x Fc perp = 0.02". NDS states "For the same stress, deformation of a joint consisting of two wood members both loaded perpendicular to grain will be approximately 2.5 times that of a metal to wood joint." I remember reading an estimation method out on the interwebs that suggested a stud bearing on a plate would experience approximately 1.75 times that of a metal to wood joint, which seems reasonable to me, but I can't find it now.
Typically plates in my structures average about 0.73 times their capacity when fully loaded, and both top and bottom plates contribute, so I'm thinking my deformation per floor due to plate crushing is like 0.02" x 2 x 1.75 = 0.07".
