A standard non vaulted ceiling has horizontal joists that span wall to wall to help support the roof structure above.
Removing horizontal beams from hip roof.
Roof spread and how to resist it by john davis.
If you remove the ceiling joists its like removing the bottom leg of a triangle.
Internal roof elements to consider during loft conversions consist of a number of sub structures such as ridge boards rafters purlins joists wall plates and steel beams.
Static 6 jun 2011 7.
Stick with the se s advice put in some steels and support the roof.
They make the surrounding walls taller often by adding taller support beams.
Once a roof spreads its impossible to correct and would require the entire thing to be stripped and replaced.
Without joists the walls can bow outward and the roof ridge line may sag.
If you don t have sufficient space above the room then a contractor has to raise the roof in order to elevate the ceiling.
When you remove the joists you must provide adequate support through the use.
These horizontal framing members tie a building s outer walls together and resist the outward force exerted by the roof rafters in conventional framing.
The trick in framing a vaulted ceiling is figuring out what to do with the ceiling joists.
A structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself.
The loads on the ridge beam are carried by vertical posts at the beam ends down through the building structural walls to the building foundation.
Without it the weight on the roof will cause the rafters to flatten particularly at the center of the span and bow the wall out where the rafters connect to the wall plate and ultimately fail.
Ridge boards in the roof space as the name suggests the ridge board is the length of timber which runs horizontally along the apex of the roof.