Dormer Oblique Rafters

The function 'inclined rafters' exists only for trapezoidal dormers, because the inclined rafters are required only for the lateral projecting surfaces of the trapezoidal dormer.

With the selection list at the top of the dialog box you can choose existing settings. Using the disk icon you can save the current setting under the same name or a new name. Via the management icon you can create new settings, also by adopting existing settings, or modify or delete existing settings. See 'Save settings' in the 'General Help' manual.

Fixed rafters

Using the partial dialog box 'fixed rafters' one can enter fixed rafters in various installation positions. Via the rocker at the upper edge of the inputs one can switch from one fixed rafter to the next. This allows any number of fixed rafters to be defined. The two numbers on the rocker indicate how many fixed rafters exist in total and which numbered fixed rafter is currently displayed. The first number always indicates the number of the current fixed rafter and the second number indicates the total number of defined fixed rafters.

For each fixed rafter one can first specify the installation position and, depending on the type, the bottom distance is measured differently. The installation positions are 'parallel to the verge', 'perpendicular to the shed slope' and 'parallel to the shed slope':

After selecting the installation position, choose the rafter setting in which the inclined rafter is defined. These are the same inclined rafter settings that are also used and stored in the normal roof structural input. Using the edit icon at the right edge of the field you can review and modify the setting values.

Partition rafters

With the partial dialog box 'partition rafters' you can divide the projecting surfaces with rafters. Here, too, you first select the installation position of the inclined rafters (see fixed rafters) and the inclined rafter setting in which the rafter dimensions and connections are defined.

Using the 'start spacing' and 'end spacing' you can place the first and last rafter at a fixed distance from the field boundaries. The remaining rafters are distributed in between. The distribution can be done either by a fixed bundle dimension, a free bundle dimension or the number of members. With a fixed bundle dimension the inclined rafters are created exactly at the entered spacing. Any resulting remainder is inserted either into the first field (start), into the last field (end) or evenly into both fields (distribute). With the free bundle dimension the inclined rafters are created with equal spacing so that the entered spacing is the maximum distance between the inclined rafters. When entering the number of rafters, equal spacing between the rafters is also generated automatically.

Here as well there is a rocker at the upper edge of the settings. This allows you to create any number of inclined rafter settings if you have inclined rafters in different positions of the projecting surfaces.