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Questions tagged [joists]

Horizontal support structures beneath the floor running between load bearing walls.

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207 views

When does a splitting floor joist become a problem?

We recently moved to the US Northeast and bought a 6 year old, two level plus basement house. I've been finishing the basement and have noticed several floor joists are splitting. I come from a ...
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2answers
64 views

Anchor drywall edge to ceiling next to a wall running along joist?

I am working on a wall that will separate the main basement area from the storage area (with a door). This new wall will run along the above floor joist which removes the possibility for drywall ...
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400 views

ceiling joist allowable span southern california

I'm adding ceiling joists in my garage. It's a 19' span between walls, and I'm using structural or #1 lumber. Should I use 2x8x22 OR 2X10X22 spaced 12" on center? I'll be adding 1/2" or 5/8" drywall.
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26 views

Can you post a 2nd floor joist beam directly to basement?

I have a house with a middle beam in the basement; all of the first floor joists lap on top of the beam. There's a bearing wall on top of the beam that goes 2/3 the length of the house. Most of the ...
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2answers
134 views

How to repair a beam of structured 2x10s

My house has a beam of 5 sistered 2x10s that are uneven. The beam has joists resting on top of it to support the floor, and joist hangers on one side to support a lowered room. Many of the members ...
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1answer
245 views

How to fix cracked roof joist?

I cut open my ceiling drywall to take a peek in my "attic" (about 20" of vertical space) before I go about having a skylight installed. I have a flat roof and I noticed one of the rafter/joists is ...
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1answer
104 views

Main Floors uneven after attic conversion

We hired a contractor to convert our attic into living space. Long story, short...he was a nightmare and left with out doing any of the finish. Now, the floor joists on the first floor are raising ...
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1answer
60 views

Saggy around sistered floor joist, how to fix?

Our house has a single floor joist that has been sistered running down the center of the kitchen. Sounds great except for the part where all the other floor joists have sagged a little bit and now ...
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1answer
42 views

Moving a Drywall & Trim Access Hatch?

I have a question similar to (Cutting ceiling joist for attic ladder install) but plan on making a typical access hatch out of drywall and trim. The question differs in other ways too. This may ...
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1answer
117 views

my house has old warped joists. Is joist blocking safe?

I purchased a house built in 1960 and like other people have mentioned the terrible bounce, I got the same exact situation. I'm thinking of installing blocking to strengthen the floor. The 7 joists ...
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1answer
584 views

Vertical drilling into ceiling joist for pilot hole

When it comes to vertical drilling into a joist, the internet is split in two: One is discussions about drilling a large hole through the joist to pass plumbing/electrical/etc, and the answer is "...
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1answer
408 views

What's the best way to insulate an attic with 2x4 joists?

My 1938 home currently has zero insulation (aside from a few fiberglass batts haphazardly tossed about). The ceiling joists are 2x4 (spaced 16 inch OC), rather than the more modern standard of 2x6 or ...
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1answer
192 views

Is joist blocking safe on these old warped joists?

I purchased a house built in 1960 and like other people have mentioned the terrible bounce, I got the same exact situation. I'm thinking of installing blocking to strengthen the floor. The 7 joists ...
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1answer
100 views

Joists to binder - best way to attach

I am planning to fit some binders to support sagging ceiling joists and want to know the best way to join the joists to binders. The joists are C16 4x2 and span over 4 meters! The house was built in ...
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3answers
204 views

maximum ceiling joist to beam span without joist hangers

I'm building a tray ceiling and the assembly is easy to visualize. In a 14' x 14' dining room, I'm coming in 18.5" to the inside of the beam on 2 sides with a 2x10, and then similarly cross-wise ...
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18 views

Creak in the floor along a joist

In just one spot in one of my bedrooms I have a creak when I step on the floor. The creak is in sort of a line for 4 or 5 feet, so I suspect it is caused by a particular joist that lies below that ...
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3answers
214 views

Repairing Hole Drilled Vertically in Joist

I'm remodeling my kitchen and pulled up the old flooring down to the joists. I discovered that a hole was drilled down into one of the joists, nearly 3/4 of the entire height of the joist. The joist ...
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2answers
195 views

Drywall installation when ceiling joists lower at the edge

I am trying to install ceiling drywall and everything is fine until I reach the edge. You can see there are 3 2x8 joists at the edge and it's somehow positioned 1/2" to 1" lower than the rest. So my ...
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1answer
230 views

How do i waterproof the joists under my bathroom floor?

How do I waterproof the joists under my bathroom floor? I recently decided to replace the floor tiles in my bathroom and found that there had been a leak under the shower. This has meant that the ...
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1answer
64 views

Mounting a Projector on a joist - Is Joint Integrity still ok?

I am mounting a projector on the ceiling in my single story extension with a sloped roof. My luck had it that there was a joist within range and I proceeded to drill into it from below through the ...
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2answers
487 views

Should I upgrade 2x6 attic floor joists by sistering some or all with 2x8s?

Our 1938 cape cod has an attic that was converted to master suite (who knows how long ago), but we've been living there for over a year. We have since decided to gut the entire upstairs and put in a ...
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1answer
300 views

Removing diagonal truss brace?

Looking to put insulation, plasterboards on the garage ceiling and some down lighters, Not a massive amount of heavy stuff is currently stored there (primarily boxes etc). There are 5 joists, joist ...
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1answer
141 views

Why would my garage have separate ceiling joists suspended below larger floor joists?

I am in the middle of building a complex storage rack system in my garage. I ran 2x4 "sleepers" across the ceiling and tied into every floor joist. My shelving system is anchored to this. Here is ...
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1answer
98 views

Replacing deck joist - board width mismatch

I am working on replacing decking and found a couple of rotted joist I decided to replace as well. The joist size is 2x8-12. I purchased the replacement joists however when I took one rotten out and ...
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1answer
640 views

How to connecting addition frame to existing rim joist

We have an addition that we are adding to our house. We built a new foundation (J-shaped, see image below). Building the floor frame over the new foundation will be done with the standard sill plate ...
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240 views

Gap between Joist and sill plate

I purchase a new home and in the basement I'm finding a section of cracked/split joists where the nail was nailed into the wood sill plate. After investigating, this one wall was not leveled with the ...
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1answer
170 views

Removing 2x4 strapping and still meeting Ontario building code

I am finishing a basement ceiling in a new house. Currently there is a 2x4 used as strapping in the center of the area for the above floor joists. I want to remove it but dont want to create issues. I ...
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2answers
303 views

Nailing a joist hanger to ledger with concrete behind

So I've got a 2x10 Ledger attached to a concrete wall. I have a double 2x10 joist that needs to connect to the ledger. I have a joist hanger for this but the installation requirements say to use 16d ...
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1answer
153 views

Can I remove blocking to level floor and sister this joist?

I'm replacing hardwood flooring but the subfloor isn't flat. In the area above this picture, I can slide two fingers under a 6 foot framing level that's laying perpendicular to the joists. That spot, ...
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1answer
415 views

Ceiling mounted punching bag without compromising structure or floor above

This question is regarding the safest way of installing a heavy punching bag of 100 lbs from the basement ceiling. Above the basement ceiling is a wood floor. The goal is to sleep soundly at night ...
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1answer
40 views

Allowable load tables based on usage

When looking at allowable load tables from Simpson for their joist hangers, why are there different numbers for different cases, even though the force is in the same direction? For example, the LUS24 ...
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2answers
145 views

Deck Joist Hanging Options

I am trying to design a replacement deck for my home. Local regulations require IRC 2015 and the area is designated SDC D2. The surface height of my deck will be ~8' 8" above grade and there is a ...
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1answer
82 views

Are these joists to code?

I am resurfacing my deck and have applied for a county permit to do the work (therefore it will be inspected). I have a protrusion at my house to support a chimney. The size of the protrusion is ...
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0answers
74 views

What is the role of this telescopic pole-looking item in the ceiling?

I've recently viewed a property and done a first pass at the work that will need doing. But, I noticed this in the ceiling of the stairwell and I'm not entirely sure of a few things: What exactly is ...
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1answer
2k views

How to Pocket joist into double Wythe solid Brick wall?

I have a project in which I am relocating a staircase in a home I recently purchased. The engineer's drawings show the joists being pocketed into the walls. My original understanding was that you ...
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1answer
96 views

After 1 year, how much gap between members is acceptable in light framing?

Many of the connections between various members (rafters, collar ties, joists, studs) in the attic of a newly constructed small barn (~1 car garage) have grown over the past year. In short, the ...
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1answer
194 views

Board on top of joists in attic. Is it structural?

I've attached a picture (not the best), but you can see the board I'm referring to peeking out of the insulation. The joists run left to right in relation to the point of view of this picture and ...
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1answer
228 views

How can I even out my subfloor?

I bought a fixer-upper knowing little about how much of a headache I was creating for myself. I've recently removed the hardwood flooring that was lain directly on the joists (no subfloor) of my ...
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3answers
994 views

Correct way to use jack post

These photos show the way the previous owners of my house used a jack post to brace sagging floor joists. I'm not sure of their method, so I wanted to check what the correct method is. Angle 1 ...
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1answer
46 views

Can I carve a portion out of the side of a floor joist to accommodate a Fernco Clamp

I am tying a pvc sanitary tee into a 3" copper DWV line which runs along a floor joist (2x12) in the ceiling of my basement. I plan on using a fernco shielded coupler 3007-33 (https://www.fernco.com/...
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1answer
81 views

how to identify lumber grade of unmarked ceiling joists

I have a detached garage that I'd like to finish the attic space to make into a office like workspace. The garage ceiling joists are 2x8x14' (unnotched) with a 13'6" span on 16". The joist appear to ...
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2answers
305 views

How to replace porch joists?

My covered porch has seen some better days. The 2x10 joists are rotted on top causing the wood on top to sag. The 2x10 is notched and inserted into the brick on both sides. I have a feeling that this ...
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2answers
788 views

Romex cable tidying in basement

Old house, crazy town in the basement in regards to wiring. I'd like to clean it up a little, at least visually - happy to get contractor out if needed - but not sure what to ask for. So what would be ...
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1answer
895 views

Attic Floor Joist - Structurally Secure

I am helping my son remodel the 70 year old house that he just purchased. He is planning on expanding on the attic on his second floor. The current ceiling joist are 12'- 2"x6" with the old plaster ...
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2answers
194 views

What to be done about cut I-joists? Cut is in lower flange above load bearing point

I am a first time homebuyer in the due diligence phase with this house. We identified in the crawlspace that a few of the I-joists had been cut, looks like with a reciprocating saw, for unknown ...
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1answer
676 views

how to run ceiling joists across a 15' room with no ceiling [closed]

removed some metal T system drop ceilings now I want sheetrock but not sure best way to run ceiling joists across 15' room if I go with 8' 2x4 how do I tie them together towards center of room to ...
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2answers
607 views

What is involved with replacing floor joists [closed]

I need to replace 3 joists on the second story of our 2 story + basement 1920s townhouse. The joists are rotted on one side all the way into the cement block wall. There is not enough good wood to ...
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1answer
61 views

Extending joists to reach a new beam. What code to review?

I have spoken with a contractor about removing two load bearing walls (amongst other work). The two load bearing walls are parallel but offset by two feet to provide space for a range/oven in the ...
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1answer
407 views

Are floor joists allowed by code to be notched at the ends?

I'm repairing termite damaged floor joists in the crawl space a 1940s house. At the chimney, there are double 2x10 trimmers and headers as you would expect but on each side of the chimney one of the ...
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4answers
212 views

Would two 1x10 placed together be as strong/load bearing as one 2x10

I have a rotted joist in my floor that I can access through my basement, but is above several pipes. I could squeeze a 1x10 through the gaps but can't get a 2x10 to fit. So wondering if I got two 1x10 ...