The factors that affect the finished height of the new structure are:
The wall height
The jumbo Bracket length
The header beam size
To set the desired FFL height of your structure (from floor to underside of roof sheet) you must take all these into account.
Open your Attachment by selecting the area above the structure and choose Modify Attachment.
From the drop-down menu, select Flyover.
The settings required will appear:
Area Pitching Height
=
Wall height + Riser height
Eave Width will determine how much of your structure projects past the house
In a structure 4000mm wide (frame to frame).
A 600mm eave will mean only 3400mm of the new structure will extend past the existing roof.
A 450mm eave will mean 4550mm of the new structure will extend past the existing roof.
You can set a partial attachment if only a portion of the structure is attached.
The software will automatically calculate the number of brackets needed based on structure size and Wind data calculations, this can be overridden at your own discretion, but if there are not enough supports, your Engineering will not pass.
You could choose to design your structure with the attachment along the projection of the structure, instead of the back. This requires careful consideration:
Is the fall of the new structure going to impact the existing roof?
Will the starting height of the new structure be tall enough to allow the end of the structure to still sit above the existing roof line with the minimum clearance required?
When you open your Attachment Options and enter the figures into the fields, the picture on the right represents the structure.
You can see at the far right of the 3D picture there is a red area, indicating that the structure is not going to work in this setting.
The 3D model also shows the issue.
This case can be solved by reducing the pitch of the new structure, by changing the roof sheet type from Custom Orb to Flatdek.
END OF DOCUMENT