Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [deflection]

13 questions
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How do I correctly install ceramic floor tile?

How do I correctly install ceramic floor tile? There's lots of talk about using backerboard and waterproofing membranes, what an acceptable floor deflection is, different grout and thinset additives, ect... Starting from subfloor-less 16"oc joists,…
Mazura
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Increasing subfloor thickness under new shower pan

I ripped my old shower down to the studs and joists. The studs were rotten, the subfloor was rotten, and the top of the joists (in some places) were weak and rotten. I plan on replacing some studs and sistering others. Joists I'll likely epoxy and…
rvandervort
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Steel tube deflection over span

I am installing 16' desktop to a concrete block wall. The back wall and one side will sit on a 2x4 ledger. The opposite short side will be a solid plywood panel to help support weight. The top will likely be 3 hollow-core doors topped with…
Ben
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Can I modify a roof truss by removing purlins and kickers?

I have an attic space I'd like to make more user friendly. The rafters are original 2x4's, same goes for the purlins, and the kickers. The span is approx 12 feet. This particular space is over a bedroom and bathroom, it has been used for storage…
user1276141
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Tile over 2x6x1.5 T&G subfloor, spanning 48" beams

Long time lurker, first time poster. I think I might have a solution to my problem but I'd like to get some peer review on it before I start work. I'm remodeling a master bath (50sf, 10x5) in a 1966 ranch and would like to add some nice tile. I…
El Jay
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Span calculator using arbitrary spacing?

My "new" 72-y/o house is... interesting. The garage is much younger but still I just raise my eyebrows at some things. One of them is the loft/attic area in the garage. I wanted to move all my computer hardware up there, of which there is a LOT. But…
Nolan Robidoux
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Backer board bowing on 24" inch steel studs for rock ledger panel installation

I wanted to screw Hardie backer board (.42") over my drywall to the steel studs to adhere 6" x 24" x1" stone ledger panels using polymer modified thin-set, floor to ceiling is 12'. Problem is that Hardie and Durock backer board specifies 16"…
Dave
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How to correct possible subfloor l/360 deflection under live load, when basement below is finished

Installing porcelain planks 6"x 36" with 11mm thickness, in main floor Living room that was previously carpeted. House is 2 story town, 13yrs old. Room size across W 18' x Length joist span of 11.8'(below shows end of joists are sitting directly…
Jake
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Stone and brick deflection due to thermal expansion causing wall separation?

The title and photo should say it all. I had chalked up the baseboard separation to foundation movement, but this particularly hot summer I noticed that the stone and brick jutting out in this area. If the photo quality were better, you'd see some…
Zero Cool
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12x24" Porcelain Tile over 2x6x1.5" T&G Spanning 48" Beams

I have some questions in regards to installing 12x24" porcelain tile over 1/2" plywood underlayment that sits above 2x6x1.5" T&G subfloor that is supported by posts and beams on 48" centers. Actually, there is an almost identical question from a few…
trazerr
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How much does 3-sided support of granite countertop material increase the distance that's safe to span?

I am designing a counter for an outdoor kitchen, with a counter made of 3cm granite with block masonry support and stone veneers to decorate. An approximation of the planned layout seen from above appears here (ignore the 5'1" dimension, it's not…
JeffM_A1
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Can I replace the engineer's I-Beam recommendation with a different one?

I'm removing a load bearing wall and the structural engineer recommended a W8x15 steel I-beam. It would save me a lot of effort if I could use a 6" beam instead. So I'm trying to calculate the deflection of the W8x15 beam and then find a W6x??…
Joe Mac
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will any glue bond 2 long, bendable metal components

I am trying to create stiffness on an 8-foot length of 1/4" acrylic, with minimal visual footprint. I hit on an 8-foot aluminum U-shaped channel (slips right over top of the acrylic), but it wasn't quite stiff enough. [1] When I combine it with a…
John G
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