That is a big span for diy built trusses. For smaller spans I designed triangulated trusses with plywood gusset plates.
May not work for your spans though
Their rationale is that the code has 2 significant figures (1.0) so 1.03 round to 1.0
1.04 is 1.1
Never liked it but that is industry standard...
A few times against my strong opinion they asked for mill test report and used higher steel grade....
It's a wonder how more don't fail!
When ia was in Pemb I was told toe design to 1.03 ratio
Reason being code specifies to design to 1.0 so the 1.03 becomes 1.0 when rounding.
That is rhe tRick they used.
Best
I spec bluesman
https://henry.com/residential-and-light-commercial/foundation-and-below-grade/blueskin-wp200
As well as waterstops at wall to ftg interface when water level is high
Skel
I have that document and very informative.
And agree with you that drift occurs, we've had several collapses 5 years ago...
But getting aggravated when other engineering colleuages say they never consider it for part 9.
This is a large custom homes with large wide open walls, irregular...
I'd like clarification whether we need to consider snow drift on a FLAT LOWER ROOF based on part 9 of the national.bldg code of Canada.
9.4.2.1 seems to indicate you do.
A9.4.2.2 seems to say you don't
I've been including snow drift on all my part 9 projects but beginning to question this...
