Are you in the construction trades?

This site is for contractors. The sister site, www.diychatroom.com has many excellent people who will jump in and help you.

 

What is your construction trade?

https://www.contractortalk.com/threads/whos-allowed-to-join-contractortalk-com.394977/

 

Do you have children?

 

I use this quite often www.headerwizard.com

 

How many queen studs and aces?

 

Use a ~28' LVL continuous header to get a 3 span effect....on the center spans, run the LVL past the first and last jamb ~14.5"
lower sunroom floor about 6" and make room 13' deep....... for far more usable space, shorter stairway from porch.

Use a quality 3/4" plywood sheathing, sideways(brick style) over openings/ jambs to splice columns to header lvl, shear panels under windows....

don't forget the tension ties/ hurricane/ tornado anchors. Use them to tie inside columns to lvl and top plate, strap studs to rim joists...rim joists to footing.....

I generally require 350.00$ to reassure any 'bad' feelings.

I'd hire someone that knows how to frame to code or better without using their Psychic Powers.........

On rereading OP, ? is"Backwall" the original house exterior wall instead of new exterior wall? if so why a header?

 

What's the distance from the heel to the toe on the rafter?
Is it larger than 3.50 MM?

 

So you are building a sunroom but, don't know how to do a simple take-off? Better watch some more how to videos.

 

I enjoyed you introduction. Now we know about you and your trade.