Questions tagged [joists]
Horizontal support structures beneath the floor running between load bearing walls.
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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 ...
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26 views
How to install second subfloor?
I'm putting in 12mm floating laminate with a 4mm felt underlayment in my living room and I noticed some bowing in the current subfloor to the point where I can see it while standing up. The high ...
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1answer
35 views
Running wire through sole plate and joist at an angle
I am cutting a new outlet in the wall between my living room and dining room. Below is an unfinished garage with completely accessible joists where I can run wire. There are double joists directly ...
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23 views
Don't bore/notch in middle third of a joist… span or member?
Suppose I have a continuous joist supported somewhere in the middle. For ease let's say it's a 24 foot continuous joist, and there's a bearer right in the middle at the 12 foot mark.
Here's a picture ...
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1answer
48 views
Leveling joists for drywall installation
So I asked a question a couple of days ago about leveling my ceiling joists. I got great recommendations, from strapping with 1X3 straps, and also metal studs.
So I placed String Lines across and ...
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2answers
53 views
How to level uneven ceiling joists for sheetrock placement
So I noticed that my 1961 year old one floor home joists are not even, some areas it's bowed down.
I ran a string line, I see about 1/2 inch low points in few areas.
I have read the standard fix to ...
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2answers
77 views
Can you sister floor joists with smaller boards?
Does adding a sister that is smaller than the original joist actually increase strength at all? If so, does it need to be sistered at the bottom (so both beams touch the sill) or does it still add ...
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Should an interior non-load bearing wall stack up to a joist or stud?
I am trying to add a partition in my garage and the ceiling joist does not line up with the wall studs. So my question is which one do I go by?
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1answer
43 views
Storing ladder below subfloor in kitchen
My kitchen height is 9 feet. To maximize storage, I am planning to have cabinets all the way upto ceiling.
To avoid lugging in a ladder all the time, I am planning to build storage under subfloor. ...
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2answers
30 views
Solving subfloor squeaks
I am planning to remove carpet in a living room and dining room area of my house and replace it with floating laminate flooring. There are some spots in my current floor that squeak so I was planning ...
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47 views
Need advice on correcting a floor dip
I have an older house (1940’s) with a dip in the hallway leading to my downstairs (1st floor) bathroom. From wall to wall the hallway is 14 feet with the wood floor joists below running parallel to ...
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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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54 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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1answer
35 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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19 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
69 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
74 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
93 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
50 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
31 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
78 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
99 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
106 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
99 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
29 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
54 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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15 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
175 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
100 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
78 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
38 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
304 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
183 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
110 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
52 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
342 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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168 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
98 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
90 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
95 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
254 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
33 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
55 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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189 views
Rafters become joists is this safe?
I'd like to use the space above a bedroom for storage. The bedroom framing is a bit odd, though, so I'm concerned about it's ability to support anything beyond the ceiling drywall. The roof above the ...
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1answer
78 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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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
809 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
93 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
120 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
102 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 ...
