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Old 03-11-2010, 09:33 AM   #1
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Removing collar ties - Plywood gussets ?


Quote:
Originally Posted by AtlanticWBConst. View Post
If they are there, then there is a reason for it...(example: the ridge beam and rafters sound undersized and this was a way of compensating)

Solution:

1.) Add knee wall framing and collar ties to each side (sandwiching) the rafters at a higher location.

or

2.) Create plywood gussets and install them at a higher location on EACH rafter.

Do not move them so far up that you defeat the purpose of the collar ties...

MOST IMPORTANTLY:
I would recommend that you have someone knowledgable, view the rafter layout on site to see if there are other structural areas that could be affected ... BEFORE you start to do anything up there.
I've seen a few people mention replacing the ties with plywood gussets. My question is how big do they have to be(ridge to bottom of triangle)? Also guessing it needs 3/4" plywood??? Anyone have a pic of the plywood gussets? thanks
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Old 03-11-2010, 10:46 AM   #2
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Old 03-11-2010, 10:53 AM   #3
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I just did this with approval by the Building Inspector. I did need to get an engineer to evaluate the plan first. The plywood gussets, the bottom came to the top of the collar ties so I gain close to 6". They were made with 3/4" structural plywood and need to be sandwiched on each side of the rafters. I used construction adhesive and nails. Worked well.
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