i would like to have a vaulted ceiling in a bathroom on my 2nd floor cape style home only 1 rafter tie in my way,running through the center of the ceiling from one wall plate to the other wall plate can i relocate this over a couple of rafters or maybe eliminate it? i'm trying to send a pic
That will have to be determined by an engineer. The tie is there for a reason. Altering it will affect the structure. Additional ties may be substituted, but this can only be determined by an engineer. I would suggest keeping the one tie and turning it into a decorative beam.
If you are willing/able, beefing up the roof rafters on both opposite sides will keep the rafters from bending down. Then even up the plane of the ceiling with other rafters. You must keep other rafter/collar ties.
Before you go full vault, recommend you do more research on vaulted ceiling insulation. A lot depends on the rafter size and how much insulation can be added with venting.
Depending on the pitch of the roof, you may be able to go to half way for the rafter ties, instead of recommended 2/3 way down from the ridge. This will give you high ceiling and room to insulate as much as you want.
A rafter tie is completely different than a collar tie. A collar tie is a horizontal element typically installed between every other or every third rafter, typically about 2/3 of the way up between the floor and the top of the rafter. The collar tie connects the two rafters together. A rafter tie is typically (but not always) the floor joist, and it connects the two walls of the building.
The purpose of a rafter tie is to keep the walls plumb, and to prevent sag of the roof ridge board. The purpose of a collar tie is to equalize uplift pressure on the roof during high wind events. The collar tie has no role in maintaining the walls in a plumb condition. Many people, including a fair number of framers and professionals, do not understand the true purpose of collar ties, and believe they help to hold the walls together.
In most cases, it is possible to relocate a collar tie one rafter over, with no noticeable effect. The same CANNOT be said about a rafter tie, which is generally installed at the same spacing as the rafter (often 16 inches OC), has a critical structural function and cannot be removed without special framing techniques. So if you are trying to create a vaulted ceiling, which you stated you want to do, I have to wonder what you plan to do with the ceiling joist which would otherwise be visible?
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