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Questions tagged [joists]

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

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66 views

Cut Floor joists for HVAC

I own an old home, circa 1919. In the 70's, when the new furnace was installed, they cut through the floor joists to run the air ducts. Awesome. So in direct correlation to those cut joists, are ...
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1answer
68 views

Shaving a floor joist without a planer?

I have an interesting problem. I been in the process of remodelling my living room and dining room - paint, lights, floor, essentially the works. And in doing so I discovered one of my floor joists is ...
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1answer
72 views

Interior wall construction - Is it possible for this to be load bearing?

I have a 2-story brick house built in 1940 with balloon construction. On the first floor, I have an interior wall between my kitchen and living room. I have done (I think) my homework, looked at the ...
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25 views

Floor Joists And Notched On Sill Plate

I have mastered many things in life, but carpentry is not one. I need to replace some flooring, and floor joist, that rotted from water damage, and it does not look like how i have seen others. The ...
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2answers
111 views

Joist hangers to use for rough cut 2x8 (2 3/4“ x 8 3/4”)?

I'm looking for the right size joist hangers for my project. I have an old house with rough cut oversized joists and can't seem to find a joist hangers that will work. I'm nailing into a 2x10 ledger. ...
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1answer
78 views

Sistering a split joist not code?

I know that building codes vary by jurisdiction so for the purposes of this question I am in Baltimore County, MD. We have a split joist in our basement. It's a 2x8, about 10 feet long. One side is ...
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56 views

How to repair cut joist around pipe *after* framing and drywall

I'm finishing my attic and have just realized that my rough carpenter screwed up by not addressing a cut joist. In photo 1, you can see that the joists have been sistered with LVLs, but there is a gap ...
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20 views

Find joists in plaster ceiling

My plaster ceiling is cracking and the advice I’ve gotten is to cover it with dry wall. The issue I’m having is how to locate the joists in the ceiling. Is there an easy way to do this to make sure ...
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36 views

Uneven floors from settling rim joist

We're trying to fix the uneven floors in our 850 sqft, 80 year-old house in San Jose. Our contractor opened up the floors and the problem appears to be that the floor joists rest on a skid, while the ...
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1answer
64 views

Whats the best way to secure a loose flooring joist where mortar has crumbled over the decades?

My kitchen floor sits on joints that are mostly OK. One wobbles though as I walk over it near a wall. It moves 0.5cm (0.25"). I lifted a floor board and had a look. You can see the crumbled mortar ...
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2answers
55 views

How to safely attach block-and-tackle to 2x8 ceiling joist(s) to handle 1000-lb load?

I'd like to make or build a block-and-tackle in my garage to be able to lift up to a thousand-pound load (e.g. a moose). I think I have a handle on the design of a block-and-tackle and the selection ...
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93 views

Should I reinforce these joists at the central beam? If so, how?

Vaguely similar questions have been asked, but I believe this situation is unique enough that I’m looking for some specific advice. I have a floor that is framed with 2x8s, 16 O.C., spanning roughly ...
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40 views

Repairing cut wooden floorboards on either side of the main joists

How do I repair cut wooden floorboards that have been cut on either side of the main joists, as now the floor is squeaking and bouncing all of the time? I have tried attaching baton underneath with no ...
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1answer
59 views

Adding floor joists to an attic

I am trying to add floor joists to an attic and intend for getting decent amount of support for plywood flooring and storage. The existing truss is 13' across and 24'' span between 2x4 ceiling joists....
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39 views

spacing of steel studs for ceiling leveling

I'm renovating a single-family basement. The floor joists above the basement are 2x8 douglas fir, mostly spaced 12" OC. The basement ceiling will be finished with a single layer of 1/2" drywall. There'...
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3answers
102 views

Repairing cracks on deck joists

This year, being a beginner in handyman skills I decided to replace the deck boards and railings of my deck. When I bought the home about 1.5 years ago the professional who checked the house for me ...
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1answer
71 views

floor joists splitting at non-beam end

I'm looking for a good way to correct and arrest horizontal splitting of some floor joists where they rest on the top-plate below. The joists are 2"x8" (nominal), spaced 12" OC, and the ends away ...
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1answer
125 views

Using strong magnets for hanging window blinds

I have a wide window a touch less than 6' across and I want to install a blind with 2" deep horizontals. The blind that was within my price range comes with five support brackets, which can either ...
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1answer
34 views

An idea to mix deflection rated I Joists?

I'm making some hypothetical blueprint ideas and started thinking about the various floor joist options. In our neck of the woods, I-Joists are by far most common with floor truss systems becoming ...
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1answer
35 views

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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41 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
40 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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1answer
54 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
89 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
359 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
279 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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2answers
37 views

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
44 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
37 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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0answers
61 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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0answers
115 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
56 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
79 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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22 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
81 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
133 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
96 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
58 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
35 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
104 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
268 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
194 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
139 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
60 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
99 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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0answers
17 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
191 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
151 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
137 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
45 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 ...