New eave member

[Tarnowski]

The new eave member will be 3x3x.090 to meet the code change
requirements in December.

Ferdi Baler and I have gone over these calculations extensively in the
last few weeks and agree that this will be the new member size required
to meet 140mph Exp C wind loads using 6063-T6 alloy. We found that the
new wind loads and not the 300lb point load controlled in this design
for an 8' maximum eave rail span. Smaller sections would work for Exp B
and stronger alloys. I plan on getting a die drawing with screw slots
and spline grooves made for this 3x3x.090 ASAP. A snap option with a
1x3 patio is also going to be considered.

Gus Tarnowski, PE

[David W Miller]

Gus:

I have a snap design for a 3X3 eave rail, which I will furnish. I also have
standardized dimensions for both the screw slot and spline groove. I'll get
them to you tomorrow morning.

David Miller

[Tarnowski]

We will also create a die for a 3x3x.072" extrusion. This extrusion
will work for Exp. B 140mph winds, which covers 90% of the jobs in the
Palm Beach county area. This 3x3x.072" will also work for the other
areas in Florida that have 130 mph and 120mph wind velocity
requirements.
If you have any questions please feel free to email me or call me for I
work around the clock and rarely sleep.

[adam]

Gus

why not have just one new perimeter .072 and cut down the tributary
width to 7'-0" in catagory c areas It will get confusing having so many
different shapes. Also I was thinking for the center of the state,
would the existing perimiter 2x2 w/1x2 snap work so nothing would have
to be changed

Adam

[Brian Smith]

Why would it be different in the center of the state 300 pounds is 300
pounds

[Tarnowski]

Brian is right. The 300 pound point load would control in the design
in the lower wind velocity areas of Florida. So the 2x2/1x2 combination
would not work at all in Florida after the new code, unless you design
with very tight column spacings.