Bearing Construction

In the purlin input you can select settings for rafter roof constructions. You can modify or create these settings using the browser button at the right end of the drop-down list.

With the drop-down list at the top of the dialog box you can save the settings under any name or delete them again. These setting names will then also be available in the purlin input drop-down list.

Depending on the selection of the construction type you can set either a corbel construction or a bearing construction. For the bearing construction the following settings are available:

Construction type: Here you select whether you want to configure a corbel construction or the bearing construction. Depending on this setting the subsequent fields in the dialog box will change.

Lower edge of post at: Here you set where the post should start at its lower end. The options are 'Lower edge of purlin', 'Upper edge of purlin' and 'Upper edge of beam'. The purlin refers to the purlin to which the information for the bearing is attached.

Beam ID number: The ID number determines the material of the beam. Using the button at the end of the field you can branch into the database and select a material.

Beam width: Width of the beam, measured perpendicular to the rafters.

Beam height: Height of the beam, measured in the side face of the rafters.

Beam offset: The beam can be offset relative to the upper edge of the purlin. With a value of 0.000 the beam lies flush on the purlin. If the beam is moved downward, a rabbet is formed in the beam. Depending on the connection between post and beam, the post is shortened or lengthened with the beam offset.

Post ID number: The ID number determines the material of the post. Using the button at the end of the field you can branch into the database and select a material.

Post width: Width of the post, measured perpendicular to the rafters.

Post height: Height of the post, measured in the side face of the rafters.

Post offset: The post can be offset relative to the rear edge of the purlin. With a value of 0.000 the post lies flush with the rear edge of the purlin. If the post is moved forward, a rabbet is formed in the post. The beam automatically shortens or lengthens with the post offset.