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

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82 views

Contractor cut joists short (followup to earlier question)

We are removing a couple of load bearing walls as part of renos in our home. The engineer specified a W8x21steel beam to replace the load bearing wall. The floor joists are 2x10. The joists are 2x10 ...
16
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5answers
14k views

Contractor cut joist hangers to make them fit

(edited with additional info re. header) We are removing a couple of load bearing walls as part of renos in our home. The engineer specified a W8x21steel beam to replace the load bearing wall. The ...
0
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1answer
30 views

Any experience with Metwood joist reinforcers?

Does anyone in the group have experience using the following product from Metwood to reinforce joists that had to be to cut to route plumbing drains/pipes? https://www.metwood.com/product/1-...
2
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1answer
59 views

What is the most cost-efficient design of a 16' temporary wooden ramp?

I need to build a 2'x16' ramp to load a moving truck. What is the cheapest design of 2x boards and plywood to do this with? The maximum load will be less than 500 lbs. I'll use plenty of 2.5" deck ...
2
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3answers
76 views

How to cut hole larger than 1/3 of joist?

I need to run a toilet drain (3”) through three joists (9 1/4”). Code states holes in joists can not exceed 1/3 the size of the joists. Catch is for 3” pipe I need a 3 5/8” hole — which is larger than ...
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0answers
29 views

Soundproof Garage Ceiling

I’m building a soundproof room in a garage for a friend, after having done something similar for myself, but am not sure about the ceiling. I was planning to use two layers of acoustic plasterboard (...
0
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1answer
32 views

Double header for skylight frame

I'd like to install a new skylight in my dining room. The skylight is 30x30 and will require one ceiling joist to be cut and (2) new double headers to be installed. Do the new headers need to span ...
29
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5answers
5k views

Is it safe to remove the bottom chords of a series of garage roof trusses?

See attached picture. Looks like an 8x10 cut-out. He wants to lift cars up so he can walk under them. Is this safe? Doesn't removing the joists affect structural integrity?
3
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2answers
141 views

Run conduit perpendicular to ceiling joists in garage

I have a sub panel on a finished wall in my garage. I want to add two 20 amp circuits and run them go outlets on two unfinished walls on the sides of the garage. Is it okay to run metal conduit ...
1
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0answers
23 views

Joist span for grade level deck

I have a sunken backyard concrete patio which is sloped for drainage. The slope reduces usability for sheds, BBQs, picnic tables, etc. The space is approx 15' x 25', with concrete walls on 3 sides. ...
0
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1answer
25 views

What fasteners to sister LVL to 2x6 joist?

We live in an antique cape and have 2x6 joists. My builder is making extra headroom for a staircase in our living room which involves reinforcing a couple joists with 2x6 LVL. Which is the best option ...
3
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2answers
68 views

Joist design for shed/workshop

I am in the process of building a roughly 12' x 16' shed/workshop. It is going to be a pier-and-beam design. There are 8 concrete piers, 4 on each side, that will support 2 4x12 beams. The span from ...
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1answer
14 views

Remove damaged flooring under edge of fiberglass tub and direction of new underlayment

I am currently living in my grandmother's old house (built ~1940 or before) where I have yet to find any previous repairs done correctly. The house is a two bedroom, one bathroom mill house type ...
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2answers
70 views

How much weight can threads hold?

I'm building a pot rack that will hang from my ceiling and I want to make sure it is secure. I rigged up a hanging apparatus that consists of a 1/2" x 12" bolt, two lock nuts, a 3/8" pipe floor ...
1
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1answer
75 views

Running wire through ceiling, ceiling joists blocking access to the top of the frame

So I was in my attic last night, about to drill some holes in the top of the wall to run CAT 6 ethernet cables down the wall. I found above the wall is two parallel ceiling joists that are completely ...
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0answers
20 views

How to frame corner of staircase header for a stairwell opening? Do you use a hanger here?

I'm designing a staircase and was a little curious on how to frame out the stairwell opening where the header meats the existing joists. There will be a double 1.75"(x2) LVL header joined up against ...
1
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2answers
134 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 ...
0
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2answers
150 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 ...
1
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1answer
86 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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0answers
51 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 ...
3
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2answers
172 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. ...
1
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1answer
143 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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0answers
62 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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0answers
54 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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0answers
38 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 ...
2
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1answer
70 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
76 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 ...
1
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2answers
138 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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0answers
41 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 ...
0
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1answer
66 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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0answers
46 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'...
2
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3answers
239 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 ...
1
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1answer
100 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 ...
1
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1answer
256 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 ...
0
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1answer
39 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 ...
1
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1answer
45 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 ...
0
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0answers
48 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 ...
2
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1answer
45 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 ...
1
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1answer
132 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 ...
1
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1answer
136 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 ...
1
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2answers
704 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
587 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 ...
0
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2answers
38 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?
1
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1answer
46 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. ...
0
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2answers
44 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
106 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 ...
0
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0answers
184 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 ...
2
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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 ...
1
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1answer
300 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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23 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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