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what city are you near, snow load can vary?
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You can use a W10x26 (50 ksi) steel beam. The beam is 5.75” wide, 10.375” deep, and it weighs 26 pounds per linear foot. You can use 3” diameter steel, schedule 40, standard pipes for supports.
You could also use a 3-1/2” x 18” Versa-Lam 2.0 3100 SP or DF. Your supports can be 4”x6” timber posts.
This is a Boise Cascade product and you can go to the following link to find distributors in your area. http://www.bc.com/wood/ewp/distributors.html
Your concrete footings should be 30”x30”x12” deep. Use 4-#5 steel rebar in each direction and place them with a minimum of 3” of clearance from the bottom of the footing.
No problem, I will open up the whole area by pulling all the rock in said area. I have 2x6 ceiling joists @ 16oc and 2x6 rafters @ 24oc . Its a hip so that may complicate it abit. lets just say that the entire room I am hoping to open up is 26' long with the 24' span. one end will have the tripod of commons and the other will be straight gable. 2x4 exterior walls @16oc. classic rambler