Modified Rafter Design
Modified Rafter Design
(OP)
I have a roof system in which the total span is 17' and the rafters are 2 x 6s. The ceiling rafters were removed and the 2 x 6 rafters are now supported with 2 x6 attached at the eave at one end and at the rafter (approx top 1/3) on the opposite end. Does this mean that I still have a collar tie at the former ceiling level? This was installed as a modified cathedral ceiling.
Thanks
Thanks





RE: Modified Rafter Design
If so, this is a big nono as 2X6's will not span 17 feet. There is also the matter of enough depth for insulation... and venting.
If I understand the problem correctly here, you relly need to engage the help of a local structural engineer here... and REAL, REAL soon. Temporary shoring at the least would be very appropriate.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Modified Rafter Design
RE: Modified Rafter Design
RE: Modified Rafter Design
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Modified Rafter Design
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: Modified Rafter Design
As noted - get some experienced help.
RE: Modified Rafter Design
RE: Modified Rafter Design
It may just be possible?? Need all info - or better yet the guy in your area who is familiar with this type of construction will need it.
RE: Modified Rafter Design
A little bit of knowledge can be a dangerous thing.
RE: Modified Rafter Design
You should should hire a local structural engineer to review the situation and prepare any repair sketches that may be required.
RE: Modified Rafter Design