I have seen very basic half lap joints, 2' long with 1-1/2" maple pegs, four of them per splice. One of the rare times I have seen hard wood used as pegging stock. The other place I have seen hard wood used is with a single peg, 1", shaved and tapered, red oak, at the dropped tie with a wedge, there was 8 of them in the whole frame, this is rare in my area. They looked much different than the spruce ones. Tim