Rafter to Ridge connection

[escanlan (Emmanuel Scanlan, TREC# 7593)]

2003 IBC:

2308.10.4 Ceiling joist and rafter framing.
Rafters shall be framed directly opposite each other at the ridge. There shall be a ridge board at least 1-inch (25 mm) nominal thickness at ridges and not less in depth than the cut end of the rafter. At valleys and hips, there shall be a single valley or hip rafter not less than 2-inch (51 mm) nominal thickness and not less in depth than the cut end of the rafter.

Don’t know why the IRC did not choose to use an exact extraction from existing codes.