[Bbj717]

Need some framing advice. The framer has spliced every rafter on this roof.
House is 36x50, 8/12 pitch with rafters 16" OC

Is this safe and structural ?

Can I have a perling, or 2x material on edge put between the joist and rafter across house?

 

[Nealtw]

I would not build it like that with out a stamped drawing from an engineer. And you should demand a copy of that. I can't imagine any inspector passing that.

 

[3onthetree]

Those look like 2x6 spanning the 18'? So with an 8:12 pitch my math figures a 21'-8" long rafter, which is why he spliced two together? A 2x6 or 2x8 is probably not adequate for the 18' to begin with. I think you are asking to put a purlin at the splice down to the ceiling joists then? My opinion is get an engineer to ok it, they'll specify the type and fastening of your joining plates and how you support any other purlins to break up the rafter span.

 

[Bbj717]

2x6 rafters are on 16 inch centers. One purlin at mid span on both sides.
I know I can hire a engineer, but was wanting some input from some master carpenters before I spend money needlessly.
I know rafters get spliced around mid span but I’ve never seen any co close to the top plate.
Can the splice area be supported with additional purlins.

 

[3onthetree]

If this is new construction, review the plans and go back to their designer if you can. If the framer is taking liberties then I would want him to have an engineer to ok it. If you are relying on purlins to break up the rafter span they need to be supported by a bearing wall, or the ceiling joists essentially designed as a beam.

 

[Nealtw]

2x6 rafters are on 16 inch centers. One purlin at mid span on both sides.
I know I can hire a engineer, but was wanting some input from some master carpenters before I spend money needlessly.
I know rafters get spliced around mid span but I’ve never seen any co close to the top plate.
Can the splice area be supported with additional purlins.

I know rafters get spliced around mid span
I have built a few houses this is something I don't know.
Who drew the plans, do you have a permit you can't just add purlins, the plan would have to be changed,

 

[House Designer]

OSB makes a crappy splice plate, so I would reject it on that point alone. OSB has poor bending strength in that direction, so it is not normally used for splice plates.
A proper splice plate can be designed with 3/4" plywood on both sides, and sufficient length of plywood, and sufficient screws or nails.