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Search: Posts Made By: wwhitney
Forum: Tile Forum/Advice Board 09-01-2019, 11:06 AM
Replies: 6
Views: 148
Posted By wwhitney
Can you find grade stamps on the 2x10s and the...

Can you find grade stamps on the 2x10s and the LVLs?

Is there any additional framing to ensure that a load on a single 2x10 will also engage its neighboring LVL? If not, I would think the LVLs...
Forum: Tile Forum/Advice Board 08-27-2019, 01:48 PM
Replies: 14
Views: 350
Posted By wwhitney
FWIW, 2015 IRC allowable span for 40 psf live, 20...

FWIW, 2015 IRC allowable span for 40 psf live, 20 psf dead, and #2 DF-L 2x6 is 9'-3". That means infill 2x6s could run either way in a 7' x 7' room. But if you run them parallel to the existing...
Forum: Tile Forum/Advice Board 08-27-2019, 10:56 AM
Replies: 14
Views: 350
Posted By wwhitney
You have the right idea, and you shouldn't need...

You have the right idea, and you shouldn't need to add footings, as long as your existing footings are adequately sized and in good condition.

Blocking between joists doesn't help with joist...
Forum: Tile Forum/Advice Board 08-24-2019, 09:21 AM
Replies: 5
Views: 213
Posted By wwhitney
FWIW, if the design total load for the floor is...

FWIW, if the design total load for the floor is currently 50 psf (40 psf live plus 10 psf dead), then the current maximum moment demand on a joist is 2700 ft-lbs [0.5 * 9 * 9 * 50 * 16/12].

If...
Forum: Professionals' Hangout 07-19-2019, 05:35 PM
Replies: 38
Views: 2,040
Posted By wwhitney
Oh, OK. Drop ears come in PEX x FIP, copper x...

Oh, OK. Drop ears come in PEX x FIP, copper x FIP, and copper x copper, maybe other combinations. "Drop ear" just refers to the location of the mounting holes. You can also get a "high ear" elbow...
Forum: Professionals' Hangout 07-19-2019, 07:40 AM
Replies: 38
Views: 2,040
Posted By wwhitney
So what's wrong with using a (non-PEX) drop ear...

So what's wrong with using a (non-PEX) drop ear 90 on a tub spout?

Thanks,
Wayne
Forum: Tile Forum/Advice Board 06-19-2019, 10:06 AM
Replies: 46
Views: 1,385
Posted By wwhitney
Simpson Strong-Tie, at least, for 2x8 through...

Simpson Strong-Tie, at least, for 2x8 through 2x12 joists publishes allowable load values when using a hanger one size smaller than the joist.

Cheers, Wayne
Forum: Tile Forum/Advice Board 06-17-2019, 04:51 PM
Replies: 46
Views: 1,385
Posted By wwhitney
So would a viable strategy be to put down outdoor...

So would a viable strategy be to put down outdoor carpet until the PT framing and plywood dries out, then rip it up, put down another layer of 1/2" non-PT plywood, then a tile waterproofing membrane...
Forum: Tile Forum/Advice Board 06-12-2019, 09:32 AM
Replies: 10
Views: 549
Posted By wwhitney
Di, On the page...

Di,

On the page https://www.johnbridge.com/vbulletin/forumdisplay.php?f=1 I see a "New Thread" button on the left just above the gold-colored bar at the top of the list of threads.

Cheers, Wayne
Forum: The Mud Box 06-10-2019, 09:48 PM
Replies: 86
Views: 3,791
Posted By wwhitney
If you want to keep out burrowing animals, you...

If you want to keep out burrowing animals, you can try trenching and burying some stainless steel hardware cloth. Then attach the hardware cloth to your on-the-ground 2x4.

Of course, if you...
Forum: Tile Forum/Advice Board 05-13-2019, 01:16 PM
Replies: 10
Views: 367
Posted By wwhitney
OK, I did the math, and for a cantilever of...

OK, I did the math, and for a cantilever of length 1/2 of the main span, the upwards maximum deflection of the main span from uniformly loading just the cantilever is 62% of the downwards maximum...
Forum: Tile Forum/Advice Board 05-12-2019, 09:41 AM
Replies: 10
Views: 367
Posted By wwhitney
I agree the cantilever is a big issue that...

I agree the cantilever is a big issue that requires some analysis. I guess the thing to do is to check deflection of the main span due to full live load on the cantilever only.

As to the subfloor...
Forum: Tile Forum/Advice Board 05-11-2019, 09:00 PM
Replies: 10
Views: 367
Posted By wwhitney
The deflectolator says: "For joists that are...

The deflectolator says:

"For joists that are SYP or Douglas Fir, in good condition, 13 inches tall, 3.5 inches wide, 24 inches on center, and 12 feet long between supports, the deflection...
Forum: Tile Forum/Advice Board 05-10-2019, 09:34 AM
Replies: 9
Views: 284
Posted By wwhitney
FWIW, there's a simple formula for determining...

FWIW, there's a simple formula for determining deflection when you have sistered two different types of joists. Namely, if joist type 1 alone would have deflection L/A, and joist type 2 alone would...
Forum: Tile Forum/Advice Board 04-21-2019, 08:30 PM
Replies: 22
Views: 637
Posted By wwhitney
PC, I don't doubt your calculations. I'm just...

PC, I don't doubt your calculations. I'm just pointing out how to leverage the Deflecto tool that is already available. The Deflecto uses a deflection formula with an explicit shear contribution,...
Forum: Tile Forum/Advice Board 04-21-2019, 06:30 PM
Replies: 22
Views: 637
Posted By wwhitney
Also, for the 4x12s, we can enter everything...

Also, for the 4x12s, we can enter everything except the spacing of 65" o.c. If we instead enter a spacing of 10" o.c., and use the worst case of a 9.5' span, the Deflecto gives an output of L/5447. ...
Forum: Tile Forum/Advice Board 04-21-2019, 06:25 PM
Replies: 22
Views: 637
Posted By wwhitney
The Deflecto can be made to model the car decking...

The Deflecto can be made to model the car decking deflection with a little manual post processing. One should also check the 4x12 deflection, which is a separate matter.

For the car decking, we'd...
Forum: Tile Forum/Advice Board 04-05-2019, 09:44 AM
Replies: 19
Views: 702
Posted By wwhitney
If you're going to have an AAV in a ventilated...

If you're going to have an AAV in a ventilated accessible wall box, then you don't actually need to do any wet venting. You can plumb the DWV like this:

For the toilet, the drain goes straight...
Forum: Tile Forum/Advice Board 04-05-2019, 08:32 AM
Replies: 19
Views: 702
Posted By wwhitney
918.3.1 addresses this: I thought that...

918.3.1 addresses this:


I thought that part about "horizontal branch drain" might limit what one can do, but looking at the definition it is pretty broad.

So I was mistaken about the six...
Forum: Tile Forum/Advice Board 04-04-2019, 07:04 PM
Replies: 19
Views: 702
Posted By wwhitney
I'm not aware of any code limits on the number of...

I'm not aware of any code limits on the number of bends in a vent line.

I believe air admittance valves have to be above the flood rim level of the fixture(s) they serve, so you'll need to at...
Forum: Tile Forum/Advice Board 04-04-2019, 01:37 PM
Replies: 19
Views: 702
Posted By wwhitney
If there is an existing vent 15 feet away, can...

If there is an existing vent 15 feet away, can you not get a combined vent for your new bathroom group through the interior walls/floors/attic to tie into that existing vent?

Your vent takeoff for...
Forum: The Mud Box 02-28-2019, 07:51 PM
Replies: 7
Views: 400
Posted By wwhitney
Check out DCA6, the Prescriptive Residential Wood...

Check out DCA6, the Prescriptive Residential Wood Deck Construction Guide, published by the American Wood Council:

https://awc.org/codes-standards/publications/dca6

It answers your questions...
Forum: Tile Forum/Advice Board 02-25-2019, 11:22 AM
Replies: 354
Views: 26,961
Posted By wwhitney
The diagram posted is not drawn well, so the...

The diagram posted is not drawn well, so the offsets appear inconsistent, but based on the numbers it represents a consistent 8" offset with corners wrapped. [Except for the righthand corner in the...
Forum: Tile Forum/Advice Board 02-25-2019, 10:00 AM
Replies: 354
Views: 26,961
Posted By wwhitney
No, you're not missing anything. When the back...

No, you're not missing anything. When the back wall is 3-1/2 tile widths, and you are doing a 1/3 offset with all 3 shifts, you are going to end up with 1/6 width tiles on the back wall. That is,...
Forum: Professionals' Hangout 02-16-2019, 11:20 AM
Replies: 36
Views: 1,409
Posted By wwhitney
The interesting part of that video, to me, starts...

The interesting part of that video, to me, starts at the 7:06 mark.

Because the room is only 60" wide stud-to-stud, and hence only 59" wide drywall-to-drywall, tub installation is tricky. It...
Showing results 1 to 25 of 500

 
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