"Lou" wrote in message
...

I've been a carpenter for 30 years. I have yet to
see a communities building code that doesn't require
doubling up the rafters. It's typical for bigger towns
and cities.

Absolutely not. I call you on this. You may have been a handyman for 30
years, a carpenter, no. There's no code which calls for "doubling rafters",
in the OP's situation.

In fact, type into your favorite search engine on how to install a
skylight.