Poor Old Guy needs help

[POG]

Hello my name is Bill

1. Area that I'd like to tile is kitchen/dining of 16'X28' and adjoining entry/hallway of 4'X12'.
2. All joists are 2x10, 16" OC. 3/4" OSb (OXBOARD) subfloor with all cabinets, vinyl and 1/4" ply removed.
3. 16'X28' area has 30"X8' cantalever for sliding glass door along 28' edge.

I have done the following:

1. Installed 5 1/2"X9"X28' beam glued and nailed fron six 14' LVLs under kitchen/dining splitting span into 9' and 7' sections. Beam supported on ends by foundation and 2X6 stud wall and by jack posts spaced 7' apart.
2. Installed 2X10 sisters along joists on the 7' side including out under the cantalever and 2X6 sisters under 9' side (2X10 wouldn't fit because of HVAC and wiring)
3. Installed five 1 1/2"X9 1/2" LVL sisters under 4'X12' entry /hall area.
4. One 2X10 on 9' side has been cut out for ducting. I plan on reinforcing it with steel angle or I-beam.
5. Plan on installing solid blocking between joists.
6. Will use 12"X12" porcelain tile.

Question:
Am I good to go with thinset, 1/2" permabase, thinset, and tile or will the floor benifit substantially from adding 1/2" ACX/BCX installed with yellow glue and 1 1/4" underlayment screws (SENCO)
Locally, the tile contractors I've called would install without added plywood but I'm kind of hung up at this point and need to make a decision as D-I-V-O-R-C-E would be a bit costly at this point in my life!!

ALSO! GREAT FORUM ..Thanks for the hours of info/entertainment

[Davestone]

I'm sorry p-o-g, but p-o-d read this three times and still doesn't quite get it,hopefully someone else will before the d-i-v-o-r-c-e.bump

[Colt]

Wow thats alot a work,!!
Likely drive truck on that floor , not a tile guy but sounds solid to me , heck add the ply and use stone
there is an engineer around here that will prob see this then youl know for sure
whats the deflecto say?
how long did it take you to do all that?
did you try flowers? (doesnt always work for me either)

[Davestone]

Deflecto won't help with that menagerie.

[Colt]

YA Dave ,
agree its alittle bit of a jumble but the 9 foot span checks out to 1083
and the 7 foot to 1813 , not even counting the sistering (were things get alittle confusing.)
Bill , check your solid spans with the deflecto meter up top

[Raymond S]

Menagerie is right. Sounds ok, but I'd wait for Bbcamp.

[Davy]

I'll send up a smoke signal for Bob, he's probably getting a head start on hiding eggs.

[cx]

Wellcome, Bill.

It all sounds fine to me. Injineer Bob gits a little twitchy when you talk about cantilevers and deflection standards on accounta it gets a little complicated. But I think he's gonna give you a green tag on all your sturcture.

As for additional plywood, it appears from my first reading that you have sistered joists everywhere on 16" spacing. The minimum standard for CBU over OSB is generally 3/4 inch over 16" on center spacing. That allows a 14 1/2 inch span for the subflooring. Keep in mind that's the minimum. You are spanning only 13 inches, so you're above the minimums for ceramic tile. We don't like to see people using the minimum required subflooring, and usually recommend they add some plywood. You are clearly not a guy who accepts the minimum on your framing, so I'm gonna leave it up to you.

My biggest question is the "Permabase." I'm not at all familiar with that product. I trust you have read their specs or contacted them for their recommendations on installation?

My opinion; worth price charged.

[bbcamp]

Floor framing looks good!

Permabase is a fiberglass mat cement backerboard. Their minimum installation specs for 1/4" thickness are for 5/8" plywood or OSB over joists on 16 inch centers. I'd say you are well above the minimums.