![]() ![]() Generated optimized section for the roof truss using the Sk圜iv S3D member design optimizer.įigure 26. Once we commit the changes, it will automatically recalculate the model and check if the section is adequate.įigure 25. The optimizer result is then suggesting that we can use L2x2x1/8 for this truss. Options for Sk圜iv S3D member design optimizer. We just need to set the criteria, and the optimizer will automatically select the most economical section for the roof truss.įigure 24. To further increase the economy of the design, we can use the optimizer. Bill of material using L2.5”x2.5”x3/16” for the roof truss. In this model, setting unit cost per kg of steel to $0.8:įigure 23. Using the Bill of Materials add-on we can set a price per kg for the section. We can see that the section we used – L2.5”x2.5”x3/16” – is adequate and passed the design checks. Member design results using L2.5”x2.5”x3/16” in accordance to AISC 360-16 LRFD. AISC 360-16 LRFD Member Design.įigure 22. Axial load result from the analysis.įrom these loads, we can already design the roof truss member using the Sk圜iv Member Design Module and selecting AISC 360-16 LRFD:įigure 21. Solving the model by clicking Linear Static + Buckling in the Solve button, we can get the following envelope forces:įigure 19. ![]() Since we are using an angle section, we need to also consider buckling. Using the Load Combination for ASCE 7-16 LRFD, the forces needed to design the member can be generated:įigure 18. Applying the roof loads and multiplying each load that we calculated above to the member length to convert it to nodal loads: Dead Load In addition, the members are modeled as truss – where the node fixity are released for the local Y- and Z-axis. The initial section we will be using is an AISC L shape – 2.5”x2.5”x3/16”. We will assume that the roof truss is simply supported and will be analyzed in 2D by adding supports on each node with code RRFRRR to only fix the Z-axis displacement. Using the Sk圜iv S3D, we can analyze the roof truss: For roof trusses, using spacing equal to 3.33m from center to center (critical member), the superimposed dead load is: The self-weight will be checked when we already have the initial section and will iterate the design from this data.
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