Questions tagged [structural]

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

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3answers
2k 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 ...
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5answers
3k views

Can I build a car-port on the side of my garage?

I have a 2-car attached garage but three cars in the household. While I'm obviously aware I can just leave the third car in the driveway, it inconveniently blocks the cars in the garage and in the ...
2
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1answer
251 views

How can I fix composite deck railing that wasn't installed with brackets?

Had a contractor install a composite railing on my deck and he did not use brackets to secure the railings he just screwed it to the posts. This was 3 years ago, it looked great at first but, over the ...
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1answer
701 views

Floor joist attachment improvements in presence of existing ledger?

TL;DR: AFAIK there are no joist hangers that can be retrofit in a location where there's an existing ledger board without removing said ledger, right? Is there anything I should think about aside ...
2
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1answer
526 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 ...
2
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2answers
397 views

Are these foundation issues significant?

My wife and I are in the process of purchasing our first home. It is 8 years old. We have found one that we like, but I am a little hesitant about going through for two reasons. The foundation seems ...
2
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1answer
2k views

How would I replace 4 posts and beam holding my covered patio with 2 posts?

I have a covered patio that extends 10' from the house towards the yard/pool and has a width of 30-33'. The covered patio seems to be part of the roof, I even have access from the attic as we ran some ...
2
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2answers
3k views

Does this ceiling joist layout look structurally sound?

I plan on talking with an architect soon, but wanted feedback from this community too. Please see the attached photo. I'm in Raleigh, NC and am using information from this site (http://www....
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0answers
34 views

Temporary supporting rafters in the middle for beam installation

I am intending to remove a load bearing wall that lies between the old perimeter of the house and the new extension. It is holding the extremities of the old roof rafters as well as a wall holding ...
2
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2answers
331 views

Wood creaking sound (intermittent, but persistent), how to finally put it to rest

So we bought a house built in 1986 last year. Over the past year, I've been able to identify a single (and I do meant SINGLE) knocking sound which generally repeats every 20-60 seconds until I go to ...
2
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1answer
407 views

Metal columns in basement span two beams

I am doing some renovations in my basement and noticed that the metal columns aren't centered on one main beam but centered on the gap between two beams. You can see it in the picture below (with the ...
2
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1answer
105 views

How to ensure all deck posts are sharing the load

I'm in the process of levelling my deck. Top down diagram below, showing decking perimeter (black), beams (blue) and posts/footings (red). Because of the irregular shape posts 1 and 3 are only 20" ...
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0answers
105 views

Will my garage truss and beam configuration be adequate for a room in the attic?

I am getting ready to finish some of the space above the garage and have some questions. I am located in Pittsburgh, PA. The garage is sloped on both sides down to the floor. I was going to utilize ...
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2answers
88 views

Do these “rafter ties” tie anything together?

I've been wondering if I can open this ceiling up for a tall room. I've been reading that the ceiling joists are often also rafter ties so I went up there today to take a look. I can see a few are ...
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6answers
9k views

What's involved in moving a support post?

We found this house that we really like, but it needs substantial renovation for our taste. The thing that killed it for us was the crazy kitchen countertop that has been narrowed to make way for a ...
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2answers
76 views

The structural integrity of a backyard structure

I need a shed, but I really don't want to put a standard-looking shed. I would like something that's pleasing to the eye and fits my property. In addition, I thought it would be cool to have a second ...
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2answers
294 views

Fix wobbly storage shelf

I just built this storage rack for my basement out of 2x4s and plywood. It is relatively stable but does have some front to back wobble. More than I would like. Is there a way to increase the ...
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1answer
259 views

Do I need to replace these metal support posts?

I have these 3 permanent lally support posts in the basement: post #1 post #2 post #3 Closeup frame captured from video #1 Recently basement was flooded so I tore down drywall prepping things ...
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1answer
150 views

How to reinforce bowing foundation?

Please note: I am obviously not a tradesman, otherwise I wouldn't be on this site asking this question. However, in five years of home ownership I have: re-roofed my garage, resanded all the hardwood ...
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2answers
55 views

Is adhesive to sister a pressure treated deck joist necessary, and if so what kind?

My deck has a cantilever of about 4 feet from the girder to where the stairs attach, and the stairs tend to have a bit of a spring in them when you walk up. I want to solidify it a bit by sistering ...
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2answers
135 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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2answers
3k views

Why are two columns holding up this support beam?

We purchased a new Ryan Homes house ten years ago and are now finishing the basement. Down the center of the basement ceiling is a large steel I-beam between the footers. Given the size of the house ...
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1answer
346 views

What was the purpose of this diagonal 2x2 along wall?

Local inspector passed me through insulation and I'm preparing to do the drywall. When I pulled the insulation wrap on the yellow insulation part, I noticed this 2x2 sticking out diagonally. For ...
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1answer
2k views

Is a sandwiched beam made out of 2x4s laid flat a suitable for a 15' span that doesn't carry a load?

After working to remove a wall that runs parallel to the ceiling joists, I've run into a little problem. The builder used a 2x6 for a nailer (to attach the ceiling drywall) on top of the 2x4 stud ...
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3answers
856 views

Cheap way to reinforce 1/2" Pipes

I used some 1/2" pipe (I got it at Lowe's; I think it's typically used for gas?) to build a simple frame for a heavy bag, essentially an inverted U (about 6.5' high, 5' wide), attached to wooden feet, ...
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2answers
923 views

Unsure about my structural engineer, can you check his drawing?

I recently asked my structural engineer to provide some calculations and drawings to remove the arch and further open up the opening between the double fronted sitting room of my 2.5 storey (2 at the ...
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2answers
77 views

Advice on supporting a sagging bay window

We have bay window that has sagged enough that that windows are out of square and no longer open or align properly to get a good seal. As such, they are drafty in the winter and we can't open them in ...
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2answers
19k views

What size beam should be used for a 15' patio cover span?

I'm looking into building a covered patio and am having a bit of difficulty finding the proper beam size required for the spans between posts. The cover will consist of either a ledger board attached ...
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1answer
816 views

Is this a load bearing wall? Please help

I have a commercial space I am working on and would like to open up the wall between two rooms its a single story building, flat roof, concrete flooring. one room is 400 sq ft and the other is 600sq ...
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1answer
156 views

How should I go about removing these two walls?

We just bought our first house, so go easy on me as I’m not an experienced DIY’er. I have read the documentation available on planningportal.gov.uk, but am still very confused. We’re hoping to remove ...
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1answer
154 views

Leveling the sagging side of the home

I am buying a home and one part of the home is actually visibly sagging. While looking at the crawlspace, I've noticed that some work was done to support the home. It seems like there is no new ...
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2answers
121 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
328 views

Split/broken rafters a concern?

I'm buying a home and had a building inspection yesterday. The only major defect the inspector found was two split/broken rafters inside the roof. Can anyone tell me if these are a major conern? ...
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2answers
408 views

Can hanging a 70 lbs punching bag from my garage ceiling cause damage?

Took a look in the attic above the garage to find somewhere to hang my 70 lbs punching bag. After seeing what was up there, I wasn't sure it was a good idea anymore so I was hoping to get some ...
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2answers
62 views

Replace steel suppost post with wood

We moved into a new build house with an un-finished basement. I am going to start finishing/framing the basement and 4 steel support posts that run down the center holding the beam. The main beam is 2 ...
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1answer
405 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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2answers
408 views

Leveling a sinking 1st floor addition that is about 4' off the ground [closed]

First time home buyer looking for good advice about possibly raising a sunken 2 room addition ourselves. Wood frame, the sill is in good shape no rotting. No warping or "cupping" of the rooms. The ...
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2answers
123 views

Will supported 2x8s or unsupported 2x12s added to existing joists result in higher rigidity?

Background: I have a kitchen supported with 2x8s 16" o/c over a 13' 3" span. I want to install a 12x24 tile floor, so that much deflection is just not going to work. Question: I have 2 options I am ...
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1answer
4k views

Why are there cracks all over my upper floor ceilings and walls? [closed]

We bought a townhome in 2012 and we moved in. The walls were OK, no cracks except an oblique one near the vent in the bedroom. In the summer of 2014 the association decided to replace the roof. After ...
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1answer
3k views

cracks on both side of the bay window

my house is a typical semi detached 1930 house, there are two cracks on the both side of the bay window , they are roughly about 3-4cm wide, it was easy to filled it up with the mortar. the crack is ...
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1answer
782 views

Can I replace a floor joist cross-brace with two horizontal pieces of blocking in the same spot?

I am doing some remodeling and want to run a 6-inch HVAC (kitchen exhaust hood) duct through the floor joists. There is one section where the path is impeded by a standard floor joist cross-brace. Can ...
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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 ...
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1answer
1k views

How can I safely reinforce my garage trusses to support ceiling drywall and insulation?

Recently bought a home that came with a double detached garage. The garage is older, perhaps from the 70s? It uses what looks like an early adoption of a truss framed roof. The trusses look like they ...
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1answer
429 views

Big vertical crack in brick wall and loose bricks

I cleaned off some loose plaster (which was evidently a patch) around hairline cracks and I found this. The 2 holes actually contained bricks which were glued in with plaster (I saved the bricks). ...
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1answer
4k views

Replace load bearing studs with 4x4 posts

I would like to open up our dining room to our living room, but don't want to install an LVL due to a limited budget. We decided to get creative. By simply removing the sheetrock, and using the ...
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2answers
6k views

Can I drill a small hole in a concrete beam?

I need to pass a bipolar electrical cable through a concrete beam (30cm high, 15 cm wide) (12x6 inches). The hole would need to be about 1cm (3/8"). Is it safe to drill through it? There is no wall ...
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1answer
212 views

How can house corner be supported when there's a deep cellar next to it?

There's this layout (view from above). There's a log house supported by very weak foundation raised from ground level and there's a cellar right next to the house. The cellar is about 1,8 meters deep ...
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1answer
15k views

How far apart should I space rafters for a 13ft patio?

I'm looking to build a patio roof (shed style) and need to span 13ft. I've found several span tables online, some of them with different maximum distances between the rafters. Is it ok to use 2x8s ...
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2answers
213 views

Attic was built to be living space in 1945, but are the trusses strong enough to keep doing so?

I have a Cape Cod style house that was built in 1945 with an attic as a living space. The trusses are 2x6, 16" apart, and don't span more than 15' across. Do I need to reinforce these trusses or ...
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1answer
203 views

New Window in Structural Brick House

I have an old house (built in the 1940s) that is structural brick. I want to add a small window on the wall to the upstairs to let in a bit more light. Is it possible to add a window to a structural ...