Questions tagged [joists]

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

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0answers
79 views

How to drill hole in joist for ethernet [duplicate]

i have a bit of an issue. I live in a 2 story house and I'd like to run 2 ethernet cables down to the first floor from my room. The issue is that when I drilled the hole, i drilled it diagonally ...
2
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3answers
969 views

Running wire to ceiling with double joist parallel to wall

I'm finishing my basement, done the framing and starting wiring for lights. One wall runs parallel to the joists, and has a double joist (two 2x8) above the top plate (the wall is right next to the ...
1
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1answer
237 views

Can I drill a bathroom vent through what appears to be an exterior joist?

I'm trying to run a vent out from a basement bathroom shower. It's almost exactly in the middle of the lower floor. I can run relatively unobstructed through the space between the joists out to either ...
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0answers
546 views

Holes through plumbers box (double header in floor joist)

A joist is right where the drain is for the bathtub and I am looking for a solution to do the plumbing. Currently, the plan is to do a 'Plumbers Box' in the floor joists which solves the initial issue....
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2answers
576 views

Do I need joist hangers for deck frame on gravel pad? What is the nail size?

I am building 12'x14' detached deck in backyard and away from the house. Frame will be of pressure treated wood sitting on gravel pad. Essentially a rectangle build of 4x6 with one 4x6 in the middle ...
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2answers
8k views

Bracing 2x6 floor joists

I'm wanting to remodel our attic to add a few bedrooms. We currently have 2x6 floor joist that span 16' on one side and 18' on another. All meeting up on the load wall. We were going to sister 2x8 ...
3
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2answers
738 views

Finding ceiling joists in an old apartment

I'm struggling to find the ceiling joists from which to hang lights in an old apartment. The building is in central Copenhagen and was built in the 1850s, so I can't assume that the joists are spaced ...
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0answers
315 views

Sistering 2x8 joists to existing 2x6 under pitched roof

We are going to be remodeling our attic to create 2 extra bedrooms and a living space. Currently there are only 2x6 joist in the attic. We are being told that we should sister 2x8s against the ...
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1answer
253 views

Should one insulate rim joists prior to adding drywall if batt insulation already exists?

Unfinished basement room with 2 exterior walls. Previous owner did the framing and batt insulation. I will finish the room by adding drywall. Should I still insulate the rim joists (adding pieces ...
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1answer
289 views

How should I strengthen my floor joists that are too small?

I have a house that is 120yrs old. The floor joists on the ground floor are only 74mm x 55mm and spaced 350mm on centres. The brickwork that holds up the floor joists is pretty rough and doesn't have ...
3
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2answers
614 views

What is this metal plate in front of wooden joist for? Can I drill through?

I am trying to install a bike hoist on my garage ceiling, and ran into this piece of metal when drilling through the drywall to the joist: It looks like the material behind the metal plate is wood. ...
3
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1answer
322 views

Unsupported Subfloor Hanging Over Joist

I'm renovating a 2nd floor bathroom and I made the mistake of cutting out the subfloor flush with the wall shared by the doorway. The problem is that this wall sits between 2 joists so my new and ...
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2answers
989 views

Concerned about roof trusses and ceiling joists in new-construction home [closed]

Found a new-construction home I want to purchase, but I have serious concerns about the roof trusses and ceiling joists. The house is completed on exterior (bricked, windows, and roof completed) but ...
1
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3answers
5k views

Can I run this pipe through joists?

I have a bulkhead or soffit above our kitchen cabinets that is being removed to make way for taller ones that will go all the way to the ceiling. I encountered a vent pipe that will be in the way of ...
1
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2answers
3k views

Can I span 23 feet with doubled 2x8 floor joists?

We are remodeling the first floor in our 2 flat. We use it as a single family. Tearing out a wall between kitchen and "second" bedroom from when it was originally built in 1926. The current floor ...
4
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1answer
827 views

Do I need blocking between 2x8 joists with an 8-foot span in a kid's fort?

About to embark on a DIY project to build my kids a fort. It will be a deck using 4x4's for legs, holding up a box of 2x8's. Three interior joists for a total of 7 2x8's will make up the frame for the ...
1
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2answers
184 views

Installing a pet door - no ideal location - support beam question

I am in the process of installing a pet door and there really isn't any ideal area in the living area to install it due to either things on the inside that are in the way or on the outside that are in ...
1
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1answer
225 views

Appropriate fixing to lay joists on top of binders

I am attempting to board out a portion of my attic space for basic domestic storage. Nothing very heavy, just Christmas decorations and the like. The area I wish to board out is the span between two ...
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3answers
4k views

How to properly double on ceiling joists

I'd like to double my ceiling joists to make my attic space easier to work in (for electrical/plumbing) and for lightweight storage. Status Quo: 2x4's (actual size) spaced 16" on-center running the ...
0
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1answer
183 views

Floors of Bathroom Very Creaky

I recently bought a new house and one of the major concerns I have is the first floor half bath. At and round the toilet, the floor is ridiculously creaky. I'm half thinking I'm going to fall through ...
3
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1answer
281 views

Which way should my joists run for a tray ceiling?

I'm getting ready to frame in a tray ceiling in my closet. The dimensions are 70" x 30". I was thinking about just using one 2x6 joist that spans the entire length (70") of the trey ceiling right ...
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2answers
3k views

How much weight can my garage's ceiling joists support?

I've got a detached garage which was built in the 1940s and I'm trying to figure out whether it's safe to add an attic ladder and use the attic space for storage. The ceiling joists are 2x6 [pine/fir],...
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1answer
175 views

preventing water from entering my no-step entry

My entry is a no step entry that was poorly conceived by the previous owners. Here are my issues: - Entry door is inset into my home, behind my foundation wall. - I live on a slope, with a circle ...
5
votes
1answer
755 views

Can I place ventilation ducting on top of joists if there is space?

I'm installing a ceiling-mounted extractor fan above a kitchen island. The problem is with the placement of ventilation ducting in the ceiling: the joists are running in the opposite direction to the ...
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0answers
136 views

Can a PSL beam support second story joists all hanging from it

My home is a 2 story home, built in 2003. There is one section in the home that was left open to above with approximately a 20' ceiling in this case. This is over the living/dining areas of the home ...
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1answer
999 views

Using 6x6 beams for roof joists

I'm designing my new home. I live in the desert southwest (Nevada). The house will have an adobe style, i.e. it will be 8" cmu's covered with stucco. I will have an essentially flat roof (1/2:12). I ...
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2answers
105 views

Should I remove existing subfloor sheathing before increasing height of the floor system?

We're turning a 13x13 area of attic space into livable space. The new 13x13 area joins an existing room. The attic floor structure is: 2x8 floor joists and OSB board on top. There is a ~5 inch step ...
0
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1answer
562 views

When to repair engineered floor truss damaged by cut?

While using my circular to cut away rotted subfloor sheathing, I accidentally cut a thin kerf notch into the flat 2x4 top of my engineered floor truss joists. The cut is about 1/2 inch and very thin. ...
2
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1answer
594 views

Repair or Replace Cut Floor Joist

After removing an old bathroom floor in a historic structure, in order to sister joists for a level surface to install new subfloor, we found that one of the original floor joists was notched, and ...
0
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1answer
350 views

Accidentally cut through joist above eave [closed]

On the far corner of our carport, I replaced an eave-mounted light a few days ago that had no junction box holding it. In trying to be a responsible DIY-er, I decided to go ahead and install a ...
1
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0answers
95 views

Bottom wall plate half on parallel joist, safe?

In replacing a bathroom shower stall, we are replacing a piece of sub flooring with your typical shower damage to it. In replacing it, I noticed the exterior wall which runs parallel to the joist is ...
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1answer
95 views

Floor Joist Tolerances

What is an acceptable tolerance for floor joists (subfloor not laid, yet) over a 4 ft span in an old home? How far out (in height) is acceptable?
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1answer
498 views

building a new house, I beams and floor joists different height [closed]

I have one section of the first floor with I beam engineered lumber 11-7/8" joists to span 20 foot area of a 20x20 room, so we have some open space in the basement. The other part of the house has ...
1
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2answers
323 views

How can I fix a squeaky hardwood floor in a small hallway?

Trying to fix squeaky hardwood floor in small hallway, think joists run parallel to floorboards on sides, near or under the walls on either side, can't find any with stud finder that run at 90 degree ...
0
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1answer
115 views

Can I use the 6x6 beam in our crawlspace as a “running board” for electric cable?

A portion of our house sits on unfinished 36" crawl space. I need to run some electrical cable (NM/Romex, 14/2) through the middle of the crawl space, perpendicular to the joists. I could drill holes ...
0
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1answer
783 views

Shimming a Floor Joist

I've got a floor joist that is low between 3/16 and 1/2 in. Because of its position, I can't sister it. How can I level it? Can I rip a 2x4 and glue and screw it to the top? Would it be stable or ...
5
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5answers
4k views

Can I cut a hole in a 2“ x 8” joist that is less than 1/3 the height of the joist, leaves at least 2“ above and below the hole, but is 10” wide?

I would like to redirect a 5" air pipe to the other side of a 2" x 8", second story, floor joist so that I can have the vent exit a bathroom vanity kick plate. I realize I cannot just drill a 5" hole ...
4
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1answer
1k views

Joist re-enforcement instead of sister

So I've got a scenario where I'd like to re-enforce my joists, and I don't currently have the ability or time to sister the entire length of the 12' joists. Now I could remove blocking, insulation, ...
0
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2answers
407 views

How do I repair deck sloping on one side of the house?

I'm in Jonesboro, GA. My deck is about 3 ft off the ground. I have a crawl space. The deck is leaning/sloping down from the house on the left side. I looked at many youtube videos and found the ...
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2answers
561 views

How Do I Level Joists for a Subfloor?

I'm renovating a 4x5 ft. bathroom and I'm having problems leveling the sistered joists with the existing floor (the doorway). I've clamped the new sister joists to the old ones in order to see how it ...
0
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1answer
180 views

Trying to hang my self-made gymnastics workout machine in my garage

I basically made this machine referencing two videos: Power Moves Training System How to Make Your Own Breakdancing Flare Trainer Mine is a tiny bit different than both but same basic design. It's ...
7
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6answers
3k views

Increase size of ceiling joist compromise roof strength?

I am in the middle of renovating my home and discovered a major problem in my livingroom. The room is 20 feet by 20 feet (400 sq ft) and the ceiling is built out of 2x4s spaced 24 inch on center. Each ...
8
votes
2answers
1k views

Structurally required? I-beam support under stair opening header

The stair opening into my basement is framed like this: A partition wall (non-load bearing) sits on top of the header. A square duct runs parallel to the header, and on the other side of this duct ...
0
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1answer
1k views

Can I run NM 12 ga circuits on a running board or MultiCable Staples across floor joists use in a basement with an unfinished ceiling?

The original wiring (1994) is along the best route where wires are stapled at the top of the interior wall plate above the finished drywall. I want to run 4 new circuits, but there is no room to ...
2
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1answer
359 views

I need help supporting and jacking up my attached, wood front porch

I live in Ohio in a home built in 1926. I do not believe the front porch is that old. The porch is L shape, wrapping around the house and is 24 X 8' in the front extending another 14' back, with ...
2
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1answer
784 views

Can I attach a freestanding deck to concrete block garage wall?

I'm certain you can't attach a ledger to cinder block that is why the deck is going to be free standing. However, I would like to know if the deck could somehow be secured to the garage. Kind of like ...
1
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1answer
88 views

What length header should I consider?

I have 2 bathroom remodeling we are planning on the 2nd floor of 2 storied house. I want to carve out part of the bathroom as laundry room where Washer (27") and Dryer (27") will be stacked in a ...
3
votes
1answer
869 views

Help running ethernet between floors, with double joists in the way

I will like to redo the existing Ethernet (and maybe COAX) wiring in my home. I have looked for the most ideal path from the basement through the floors into the attic and then drop into the second ...
1
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1answer
1k views

Which trade(s) should I hire for structural repairs?

I need some structural repairs done to the floor joists of my house. Which trade should I contact for quotes? I was initially thinking about getting a structural engineer involved directly since I ...
3
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1answer
1k views

Why does the maximum deck overhang sometimes decrease with joist spacing?

The deck construction guide for my area contains this table: Look at the "Allowable Overhang" columns. It's odd that a wider joint spacing (24") permits a longer overhang. For example, look at the ...