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Introduction to Truss Loading Course Workbook

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Fifth Load Case (Steeple 5) The fifth load case accounts for the maximum unbalanced wind load with snow right to left that is perpendicular to the ridge. In our example, the -1000 and 1400 pound concentrated loads shown below have been calculated to reflect these loads. Notice that the snow load is only applied to the top chord from the peak to the right end of the truss. Use the same steps as the first load case, add the point loads. Remember to Set the Current load case field to "Steeple 4" before beginning. Method 2 NOTE For adding the load cases In Method 1, we copied the STD.AUTO.LOAD load case for each of the five load cases that were created and changed the New Description each time (i.e. Steeple 1, 2, 3, 4, and 5). In Method 2, we will copy different load cases which are listed below. You will use the same steps from above to copy the load cases. - First Load Case (Steeple 1) – Is copied from the STD.AUTO.LOAD load case. - Second Load Case (Steeple 2) – Is copied from the worst case downward MWFRS case parallel to the ridge. - Third Load Case (Steeple 3) – Will be copied from the worst case uplift MWFRS case parallel to the ridge. - Fourth Load Case (Steeple 4) – Is copied from the worst case uplift MWFRS case that is perpendicular to the ridge and from the right side of the truss. - Fifth Load Case (Steeple 5) – Is copied from the worst case uplift MWFRS case that is perpendicular to the ridge and from the left side of the truss.

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