This was on a 100+ year-old house with original 2x4 rafters. As a means to provide additional support for the rafters, it appears they’ve attached another 2x4 directly under the rafter on edge and then nailed OSB on each side to hold it all together. It kind of looks like an attempt to create an after-the-fact laminated beam. Seems to me like they are actually making it worse by adding more weight for the original rafter to support. Any of you seen this method used before?