|
|
|
|
|
You can select which portions of the building on which to generate loads by using the load generation options in the Generate Loads form This feature is useful in isolating the loads that are generated on a particular surface result to verify that they are in accordance with your calculations. It can also be used to selectively determine which portions of the building you want create your own loads for.
Wind Direction
Shearwalls allows you to input loads for opposite wind directions, that is West to East and East to West, North to South and South to North. However, for most buildings with ridge lines down the center of all blocks, the resulting shear forces will be the same. If you wish to eliminate redundant output data in this case, you can generate for one direction only.
To do this, you have to select the direction you wish for one orientation, say North to South, generate loads, then select the other orientation, say East to West, and press Generate and Add to Loads.
Building Surfaces
You can choose to generate loads on walls, sloped roof surfaces, and gable end surfaces separately. The separation of gable ends from other walls was done for convenience given that gable ends are input as roof panels.
Building Face
You may choose to disable the generation of leeward or windward loads for a particular wind direction. This feature would be used rarely, when you wish to create your own loads manually on a building face.
Area Load or Line Loads
If you wish, you can specify that the loads are created as area loads with a tributary width corresponding to the area of the elements that generate the loads. This option has no effect on the loads that appear on the screen, as they have been converted to line loads and combined with other loads. It has no effect on the resulting shear line forces.
Exclude Roof Portion Covered by Other Roof
This allows you to model the shadowing effect of the roof from one block framing into the roof from another block. The portion of the roof that is not subjected to wind pressure because it is covered by the other roof is excluded.
You would uncheck this if you wanted a more simple load profile and were not concerned about the conservative duplication of loads on the shadowed portion.
Hip Roofs
This input is disabled for the Canadian version of the program and just indicates that the program treats low-rise hip roofs as side panels as discussed in Hip Roofs.