Question

Please include the explanation of calculations

Member Sizing We recommend you develop a spreadsheet for both problems on this homework. Using spreadsheets to do repetitive calculations is an indispensable tool in structural design, and can help you to quickly develop your intuition. However, you may elect to perform the calculations by hand-it is up to you PROBLEM While working at an internship you are asked to assist in the member design for the structural elements to a wood deck. Your task is to recommend the most efficient dimensions for beam A and rim joist 8 (edge) (shown here in plan): NOTES A) Beam B) Girder DEAD LOAD: 40 PSF 30 16 Material: .Douglas fir is the wood species provided for the girder and beam selection above. The corresponding stresses are below: o Fv (shear) allowable- 95 psi o Fb (bending) allowable- 1500 psi 1 Determine the Tributary Area; Loads; and Support Reactions. 2.Draw axial, shear and bending diagrams for Beam A and Girder B. 3.Determine the maximum internal axial stress, bending, and shear stress 4.Specify the 'most efficient' cross sectional area for beam A and rim joist B under the given load condition above. Remember, the most efficient is categorized as the section with the least area, and a section modulus, that will yield stresses less than the allowable shear and bending stresses provided. Choose your lumber from the following list: 2x6, 2x8, 2x10, 2x12, 3x10, 3x14, 4x8, 4x10, 4x12, 6x8, 6x10. "Remember that actual wood dimensions are smaller than their nominal sizes

Answer 1