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You set up your roof configuration for each roof block using the Roof Construction section of Roof Input Form.
Flat Roof - If this is checked, the building is given a flat roof. No wind loads are generated for the roof, but the roof is considered for enclosure calculations and for seismic building mass.
Hip construction – Either end can be designated as having hip construction. When this is selected, the end is given the default angle in the design settings. Hip ends are treated as side panels in the wind load calculations.
Gable end construction – Either end can be designated as a gable end. Such ends are treated as walls for wind load and seismic building mass calculations, however they are not designed as shear walls and do not appear in the Wall Input Form.
Joined construction – This selection is enabled if a roof end can frame into another building block. It can only do so if the end is entirely contained within the edge the other block. When Joined is selected, the block is resized so that the end is at the same location as the edge of the other block, and the angle is set to 180 degrees minus the angle of the joining side.
Joined sides are not included in wind load or seismic mass calculations. The current version of Shearwalls does, however include the shadowed portion of the block that is being joined.
Ridge direction – When the ridge direction is changed, the roof angles are rotated in a clockwise direction. Previously "joined" ends are made into hips or gables according to the default settings. Hip and gable ends are not automatically rejoined - this must be done manually. Hip end slope angles are adjusted if necessary.