wood connections - built up member

huangyhg

wood connections - built up member
i need to design a wood member (either sawn or engineered lumber) that will act as a single unit under load.  the section will be built up from pieces fastened face to face and on edge.  for instance, if (4) 1 1/2 x 7 1/4 units are to be used in the final section, two will be on the bottom, two on top, so the final section is a 3"x14 1/2" member.  how can i calculate a fastening that will ensure these members act as one piece?
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