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-   -   Stair Stringer capacity for tile? (http://www.diychatroom.com/f5/stair-stringer-capacity-tile-22737/)

tigerbalm2424 06-24-2008 06:36 AM

Stair Stringer capacity for tile?
 
Looking to stone tile my stairs. Should I have any concerns of weight of stone tile on them? What would stringer requirements need to be for stone tile?

Termite 06-24-2008 07:55 AM

To install tile of any kind on stairs, you need the stairs to be stiff. If they have any deflection in them, the grout joints won't survive long. The weight of the stone will contribute, but won't be as big of a factor because it is a static load on the stairs at all times and doesn't cause movement of the whole system. A dynamic load...Someone walking up and down the stairs, will be the real issue.

Do you have access to the underside of the stairs? There isn't a given stair jack requirement because there are just way too many variables (stair seat cut dimensions, jack material, length, etc.). If you have access to the underside of the stairs perhaps a wall could be built underneath the jacks (perpindicular to them) to keep them from deflecting.

If you're re-building the stairs altogether, I'd suggest 11-7/8" LVLs for jack material. TJI Timberstrand rim board can also be used for stair jacks, and it is nice and stiff. Both products have excellent dimensional stability. If your stairs are three feet wide, I'd use three jacks.

tigerbalm2424 06-24-2008 08:01 AM

Yes, I have access to the underside of the stairs, no issue there. The original builder cheaped a lot of the materials initially so the plan is to start by removing the carpet and see what I am dealing with, and go from there. Im sure there will be some replacing/adding going on. What about adding stringers? If there are 3 and I add two more in between them....



Also, what are stair jacks/jack material?

47_47 06-24-2008 09:59 AM

I'd say the jacks another name for the stringers, based on thekctermite's recommendation to use LVL and a kneewall supporting them.

Termite 06-24-2008 10:21 AM

Quote:

Originally Posted by 47_47 (Post 133275)
I'd say the jacks another name for the stringers, based on thekctermite's recommendation to use LVL and a kneewall supporting them.

Yup, those words get used interchangeably around here. Sorry to confuse things!

tigerbalm2424 06-24-2008 10:28 AM

Quote:

Originally Posted by thekctermite (Post 133280)
Yup, those words get used interchangeably around here. Sorry to confuse things!

ok, if thats the case then adding two more stringers should be adequate right?:yes:


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