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Questions tagged [structural]

Questions about the structure of a building (i.e. moving, adding or repairing walls).

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50 votes
4 answers
51k views

Are there ways to determine if a wall is load bearing?

Other than looking up blue prints, which many homeowners may not have, are there ways to determine if a wall is load bearing? Methods I can think of might include: Going up in the attic to check if ...
Doresoom's user avatar
  • 15.8k
7 votes
5 answers
13k views

Repairing a notched floor joist

Situation I was running some new gas pipe and I notched one floor joist and drilled a hole in another. I have now learned that this is not appropriate. This was in the forbidden zone of the middle 1/...
Peter's user avatar
  • 191
3 votes
3 answers
19k views

What is the right way to mount a support column to a deck and to a header?

Situation: I have an existing deck with a roof overhang. I'm in the process of planning a rebuild and need to detail how the columns will A: attach to the existing roof and B: to the deck. I can find ...
Sullivan's user avatar
  • 131
3 votes
2 answers
2k views

Floating wall mounted office desk

I'm currently about to embark on redeveloping my home office. We have a room with a small alcove and want to mount a desk top inside it. The approx size is 220cm x 80cm We can source the wood we ...
Wayners247's user avatar
15 votes
5 answers
105k views

How do I improve Pergola Stability?

The deck is nearly finished but I have a small structural problem with the pergola. A left or right force near the top of the pergola (such a a tall person leaning on the post) leads to a bit of ...
Chris Cudmore's user avatar
82 votes
12 answers
70k views

Is there a case where nails are better than screws, from an engineering/structural standpoint?

Is there a case where nails are better than screws, from a structural standpoint? For instance: Say you used screws instead of nails on a backyard deck, when the design specifically called for nails. ...
Chris W. Rea's user avatar
  • 1,495
21 votes
3 answers
29k views

Is notching a flange on an I-Joist ever acceptable?

My home builder said that the following notch in a flange on an I-Joist was acceptable, but I've read that you're never supposed to do so. Is that true?
gibbo's user avatar
  • 313
8 votes
1 answer
35k views

Is my attic floor over my garage strong enough to use it for storage and maybe as a small work area?

I would like to use the attic space above my 2-car garage for storage of items around the house and garage, and if possible, utilize some of the space as a small work area. The previous owners left ...
Al Schuppe's user avatar
7 votes
2 answers
19k views

Is my closet load bearing?

I want to remove the closets that are in the hallway off of my garage so I can install new cabinets for a mud-room. I want to make sure the closets are not load bearing before I remove. Here are some ...
Brett's user avatar
  • 71
4 votes
1 answer
394 views

How Do I Frame an Opening in My Bathroom Floor

I am fixing termite eaten and improperly spaced joists in my home. I need to create space for the bathtub drain fixtures, which are currently riding right up on a joist that runs under the bathtub, ...
Zen00's user avatar
  • 45
3 votes
1 answer
1k views

What structure is inside these stair walls between floors (for running wire)?

I am planning to run CAT6 from the basement to the attic through the first and second floor of my 1905 wood house (renovated some time in the last 20-30 years). Location is Seattle. There's an ...
Steve's user avatar
  • 287
3 votes
1 answer
3k views

Are these drywall blisters normal settling, or is there something wrong?

My house is two-story wood frame construction, built in 1979, with an addition that was put on some time in the (I think late) 1980s. Recently I have noticed several blisters in the drywall, as shown ...
Moshe Katz's user avatar
  • 2,700
2 votes
3 answers
2k views

Hanging heavy bag from I-joists

I have wooden I-beams in my basement ceiling that support the floor above (see attached picture), and I want to hang a 100 lb sandbag from these I-beams. As far as I can tell, the beams are made of ...
StackMonkey's user avatar
0 votes
1 answer
9k views

Why can I feel my seven pound cat walking across floor of my home?

The house is only 9 years old. (I am the second owner) I know they settle but in the last year I can feel all movement across the floor- year ago I could barely feel anything but did notice that ...
Jamie's user avatar
  • 34
29 votes
5 answers
47k views

Is it unsafe to remove one stud from a load bearing wall?

I need to cut a hole for a recessed medicine cabinet. This wall is at the end of the house. I only need to cut one stud to make a frame for the cabinet. Will this damage the integrity of the bearing ...
Sonia Leon's user avatar
25 votes
1 answer
24k views

Is my rapidly failing foundation dangerous?

I'll be succinct. I'm afraid we're having a full structural failure. Over the past week, crack after crack has been appearing in our plaster and walls. I'm honestly concerned for our safety. Our ...
Slytherincess's user avatar
12 votes
1 answer
9k views

Can I raise a sagging shed roof by winching the walls back into place?

TL;DR Can I fix the sag by slowly jacking up the ridge, simultaneously tightening some steel cables attached to the top of each wall? Measuring between the top of the wall and the top of the ridge, ...
3Dave's user avatar
  • 237
10 votes
6 answers
11k views

Are these integrated diagonal wall braces structurally important?

I was helping a friend expand the width of a closet door, and when we pulled the drywall off the interior wall frame, we noticed some diagonal wall braces in the interior wall. I am pretty sure they ...
TylerH's user avatar
  • 1,076
10 votes
3 answers
52k views

How can I choose the best lag screw / lag bolt?

I will be fastening Unistrut vertically along studs to facilitate garage storage, and want some guidance on choosing the "best" lag bolts to use. I want them large enough to handle hundreds of pounds ...
Billy left SE for Codidact's user avatar
8 votes
5 answers
7k views

Can I put a 6" hole in this ceiling joist?

I'm working on my kitchen to add a range hood that goes outside the house. I'm putting the 6" exhaust pipe in my ceiling, between my 1st and 2nd floor, going in the direction of the ceiling ...
Guj Mil's user avatar
  • 194
5 votes
2 answers
2k views

Could I cut out the affected area in a termite damaged joist or would I need to replace the whole joist if it's rotted at the end

So I have a 2x10 floor joist that's only about 5 feet long (short because it only spans a rounded part of my house) which has termite damage at one end for about 1.5 feet. The damage is on the ...
MonkeyBonkey's user avatar
  • 1,209
5 votes
1 answer
4k views

Should I worry about sagging joists?

I have a two story house and some of the joists between the floors are sagging about an inch or two. When I walk around upstairs I can feel the level difference and downstairs you can slightly see the ...
ddonnell's user avatar
3 votes
1 answer
1k views

Proper backfill for a trench dug below foundation level (within the 45 degree cone of support)

Given a trench dug below foundation level, what's the proper way to backfill? Here I'm talking about a trench below the bottom edge of an unreinforced concrete foundation built in 1950, supporting a ...
Bryce's user avatar
  • 10.9k
3 votes
1 answer
3k views

What is involved in enlarging a concrete garage door opening?

I have a concrete garage with an opening measuring 99" wide by 85" high. There is 10" of concrete from the door opening to the left and right walls and about 1' above. All walls are 8" thick and ...
Uncle Meat's user avatar
3 votes
1 answer
2k views

Can I remove a rafter tie from my shed roof framing for better access?

I have a 10x16 shed that use for a woodshop and am planning to remodel it soon. I currently store some lumber in the roof trusses and would like to make it a little easier to do that in the future by ...
jesse_b's user avatar
  • 584
2 votes
2 answers
4k views

Need help reinforcing a pergola

We built a pergola last fall and are noticing some wiggle in the structure. The columns are bolted into deepened edges of a concrete slab, But we did not want traditional brackets at the column to ...
Ziggystardog's user avatar
2 votes
1 answer
1k views

Remove support under the interior stairs

Hi I’m putting storage space under my interior stairs. The area I want to open up has a piece of timber right in the middle. I’m hoping some one can tell me if it can be removed? Pic1-Purple is the ...
pamela lucas's user avatar
2 votes
1 answer
277 views

Exterior wall framing - Safe to remove 2x4 that was part of soffit/bulkhead?

I've removed all the soffits in my kitchen, however, there is one 2x4 that I have left until I could consult someone more knowledgeable. I'm thinking the 2x4 was there just to hang the drywall ...
DrTarr's user avatar
  • 396
2 votes
1 answer
354 views

Structural engineer recommends fix

I asked a question a few weeks ago about a diagonal crack in one of our main support beams in our basement. With your advise I ended up have a structural engineer come take a look at it and he ...
Mitch DiMauro's user avatar
2 votes
1 answer
2k 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 ...
mctossy's user avatar
  • 23
2 votes
4 answers
4k views

Acceptable joist depth for a second set of ceiling-only joists

Background I'm installing a new ceiling in the kitchen of the bottom unit of a multi-family home. The house is quite old and uses 2x8 (actually 2"x7.5", not 1.5"x7.5", due to era of lumber) over a ...
Steve's user avatar
  • 21
2 votes
1 answer
1k views

Is this drywall cracking a structural problem?

I have a multifloor condo, with garage first floor, living space second floor, bedrooms third floor. At the corner stairs from second floor to first floor, the drywall is cracking (and seems to be ...
DuckMaestro's user avatar
1 vote
1 answer
896 views

Add storage to hidden attic space above garage?

I recently discovered that I have an unfinished attic in a guest bedroom on the second floor of my house, above the garage. The overall area is behind the closet in the bedroom and is approximately ...
ab217's user avatar
  • 151
1 vote
1 answer
53 views

Are Steel SIPs Structural?

I am from the Caribbean and we have a lot of termites so OSB SIPs are not an option, my question is this, are steel SIPs Structural like OSB SIPs? SIP = Structural Insulated panels. EPS = Expanded ...
Pitaboss's user avatar
1 vote
1 answer
137 views

Need help evaluating damage to pergola post

I have a 10-year-old cedar pergola (see picture) and I just discovered some moisture and carpenter ant damage in the base of posts. The damage had been hidden beneath decorative base caps. I scraped ...
Darryl's user avatar
  • 383
1 vote
2 answers
20k views

Filling a hole made in a wood stud

Bottomline, I think I've made a huge mistake. I was drilling through studs in a load bearing wall to pass a cable. This is on a doubled-up stud going perpendicular into a joist. Definitely load ...
Matt's user avatar
  • 1,301
0 votes
1 answer
309 views

How do I repair this joist? [duplicate]

Previous homeowner cut a big notch into a joist in the basement to vent a gas water heater. I had the water heater replaced with electric, and now I want to fix the joist. (Photo below, with annotated ...
Andrew's user avatar
  • 128
0 votes
1 answer
153 views

Trying to see if wall I removed 1.5 years ago was load bearing [duplicate]

We bought a house awhile back and removed a wall we think was there to divide the kitchen from the dining room. We wanted a more open concept. Just want some assurance the wall was not load bearing. ...
Brady's user avatar
  • 11
0 votes
1 answer
224 views

Adding storage above garage ceiling

I'd like to add some storage space in the ceiling of the garage. It looks like someone got a start on it already. There looks like a 16 foot 2x4 nailed into the top of the wall on both sides with one ...
Chad's user avatar
  • 17
0 votes
1 answer
562 views

Floor frame for 8' wide shed is 3" too wide on either side

I'm currently building an 8' x 13.5' shed with a loft. Here is what it is supposed to look like (according to the plan): For a few reasons, the floor frame is too wide. I poured the piers slightly ...
fisherpeak's user avatar
0 votes
2 answers
4k views

Structural (cored) bricks for a patio?

I have the opportunity to purchase some pallets of structural bricks, the cored ones with three holes in them. I want to use them to build a patio but I live in Ohio where the winters can get harsh. ...
The Marinos's user avatar
0 votes
1 answer
706 views

What's the purpose of diagonal braces on the attic's wall

I am trying to make a closet in one of the rooms on the 2nd floor of my house & when I broke the wall, I saw diagonal braces, which made me kind of wonder what the purpose of those would be & ...
i--'s user avatar
  • 263
0 votes
2 answers
2k views

Roof eave missing knee brace - how to mitigate problems as snow season approaches?

Photos at the end of the post. On an old house (new to me and my partner) there are ~2' eaves extending all around the house, supported by knee braces made of 6"x6" beams and a few 2"x4"s. Inspecting ...
cr0's user avatar
  • 1,439