Questions tagged [structural]

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

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3
votes
2answers
3k views

Reinforcement for Ledger Board on Bearing Wall

I'm helping a friend remodel an old addition on his house. We've uncovered a construction technique that may have been normal 60 years ago, but isn't up to the standards of today. I'd like to know if ...
3
votes
2answers
45k 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 ...
3
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2answers
293 views

When sistering a joist or rafter, must the ends of the sister be supported?

When sistering a floor joist, must the sister be full length to the original joist and must the ends of the sister be supported on a sill or beam for the sister to be truly effective? Assume the ...
3
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1answer
2k views

What is the point of this doorway “header”, and can I simply remove it?

We're remodeling a room with a severely undersized doorway - it is much shorter than the standard 6'8", so much so that I hit my head on the jamb if I don't duck when walking through it. After ...
3
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4answers
17k views

How to calculate steel beam and posts size to replace existing wood beam in terrace

I have a covered terrace that extends 10' out (West) from the house towards the yard/pool and has a width/span of 32'. The current beam is made up of (2) 2x6 in wood placed side-by-side functioning ...
3
votes
1answer
104 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 ...
3
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1answer
2k views

Is This Basement Window Frame Structural

I'm renovating a bedroom in the basement, and I am trying to upgrade the window to meet the local egress requirements (Ontario, Canada). We have a standard bungalow with cinder block walls, built in ...
3
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1answer
503 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 ...
3
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1answer
2k 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 ...
3
votes
1answer
88 views

Temporarily moving 2 walls off of a slab

The very quick backstory is that in order to remain grandfathered to retain my current setbacks (i.e., too close to property line and alley), I must retain those 2 original walls of my garage. I ...
3
votes
1answer
151 views

Illegal power connection, how should I handle this situation?

I saw a yellow (old flat style) extension cord wired to a power pole way above the meter and then the cord dropped to the front of the structure and was wired to the base of an unmounted porch light. ...
3
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1answer
4k views

Replacing rusted metal front porch posts

My parents' front porch is surrounded by old medal posts that have undergone a lot of rust over the years, and this spring we noticed that at least one of the posts is no longer connected to the ...
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2answers
1k views

Advice on hanging gymnastic rings in garage rafters?

I have ordered this metal bracket for hanging gymnastic rings in my garage to add to my home gym ( https://www.roguefitness.com/rogue-ring-hanger ). My garage does not have a second story above it, ...
3
votes
2answers
269 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 ...
3
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1answer
197 views

Remove Foundation Concrete Block

We are having HVAC ductwork installed in our crawlspace and one of the companies mentioned they do not remove foundation concrete blocks due to liability. Unfortunately, for us to have registers in ...
3
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2answers
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 ...
3
votes
1answer
164 views

Should my chimney sit on my roof?

I am renting a house built in the 1940s. The mortar around the brick was cracked causing leaks. Someone had built a chimney around the outside of the original chimney. So outside it's twice the size ...
3
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1answer
1k views

Front House Posts Not Resting on Anything

I have 5 roof support posts that are supposed to be resting on concrete blocks but one of them is not even touching the concrete block and the other 4 have some separation from the concrete block. ...
3
votes
2answers
2k views

Are there span tables published for repairing a cut roof joist?

A roofing company mistakenly cut a 2 foot section out of a roof joist, on my home. I'm seeking a reference to what would constitute a proper repair, preferably a prescriptive code or a load table. ...
3
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0answers
70 views

How can I reduce the bounciness of a floor? [duplicate]

My apartment is on the second floor of a low-rise building. There are no units directly under it; the apartment sits above the open-air garage. I feel basically everything that my next door ...
2
votes
1answer
321 views

Pouring slab but second story sags in old home

I bought a two story home built in early 1900s. It was completely gutted. It had a crawl space so my husband decided we are going to put a slab pouring the concrete 4" higher than the original floor. ...
2
votes
3answers
3k views

What size beam do I need, and can I build one from lumber and steel?

I want to support a 20 ft. span of my roof where two roofs come together. My house is was originally 46'by 20'. A 40'by 12' addition was added, making an L shape, and when they put the beam in they ...
2
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2answers
201 views

When buying a rental home after many years of our occupancy, is a home inspection still necessary? [closed]

I lived in a rental home for around 8 years and am currently negotiating the cash purchase of it. Because I've lived here for so long and (this is my first home purchase),I'm very familiar with the ...
2
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3answers
123 views

Why is double plate necessary in this case?

I'm creating a 10'8" opening to my kitchen. The architect proposed a double top plate with king stud, jack stud and (3) 2x12 header but would not explain why. The existing framing does not have ...
2
votes
2answers
832 views

Overkill from my Structural Engineer, can you check his drawings?

I have a cape I am moving the stairs and dormering the back. My engineer sent me these drawings. I think its overkill that he put HSS steel posts with w6x25(steel beam) across for the support. He has ...
2
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3answers
1k views

How far out of square is too far?

What is a good margin of error on the diagonals for a 5x10 foot, square wood foundation? I have about 1/2" discrepancy on the diagonals. (for a shed).
2
votes
2answers
740 views

Can you place a support header in the ceiling?

I am opening up a pass-through in my home and, ideally, the pass-through would open up all the way to the ceiling. It is a load bearing wall, so it will need a header. A contractor told me it is ...
2
votes
3answers
758 views

Does this truss have two or three bearing points?

Part of my roof is made from studio trusses as shown in the picture. I'm trying to determine if any of the load from these trusses is borne by the highlighted wall. The wall is built with 2x6s, but ...
2
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2answers
103 views

How much should I worry about this large crack in the foundation slab?

I recently bought a 3-story townhouse in northern Virginia. I pulled up the carpet on the bottom level (foundation is a slab on grade) and discovered a large crack running along the whole room and ...
2
votes
1answer
156 views

beam to replace 5 studs of wall

I recently removed 2 studs from a wall and now I feel like it is not enough, so I intend to remove 3 more. The house is 26' wide and 30' long, built in 1918. It has a basement, main floor, and attic....
2
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2answers
1k views

ELECTRICIAN BORED 4" HOLE through top & bottom chords in attic — how to fix?

I'm extremely concerned; hopefully unnecessarily so. We recently upgraded our electrical panel and I just noticed (about a month and a half later) that the electrician bored a 3.5" hole through what I ...
2
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3answers
2k views

Are window air conditioner support brackets designed to support a window air conditioner by itself?

I have this air conditioner that is designed to be used with vertical sliding windows. The problem is that I have a horizontal sliding window. I understand that the air conditioner I have is designed ...
2
votes
2answers
574 views

Structural cross joists and load-bearing walls (century home)

I have a friend that recently took possession of a century home. Its a 4 plex and He was told it was an old school house (at least at some point in time). We’re experienced weekend warriors but ...
2
votes
1answer
5k views

Replacing rot in wooden porch column

I have a porch column which has some rot at the bottom. These are smaller porch columns similar to http://www.homedepot.com/p/Unbranded-6-in-x-6-in-x-8-ft-Pine-Porch-Column-709721/202087424. I've ...
2
votes
2answers
3k views

Fixing a sagging foundation

We are currently renting our house and considering purchasing it from the owner, but it is sagging, and in some rooms it is rather significant and noticeable, with the worst parts being approximately ...
2
votes
2answers
34 views

Mounting bat house on cedar siding - too heavy?

I have built a pair of bat houses using these plans at Bat Conservation International. A finished house weighs about 25 lbs (11 kg) and I would like to attach it to the outside of my house, over ...
2
votes
3answers
90 views

Can I remove this post on the lower floor of a two-storey home?

In the living area of my house is this decorative rail and post. I want to remove them. While I suspect such a narrow, solitary post would not be made to bear a load, I am not a builder so I still ...
2
votes
1answer
89 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 ...
2
votes
4answers
3k views

Fix Leaning Playhouse

We just moved into a new house and acquired this playset/swing in the process. When we walked through before buying it I never realized how badly it was leaning. I am now trying to figure out the best ...
2
votes
1answer
1k 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 ...
2
votes
1answer
19k views

How can I calculate the yield strength of steel tube?

There's a lot of information -- and even some debates -- on which has a stronger yield strength between square and round steel tube. The majority points to square when the dimensions are equal at the ...
2
votes
2answers
85 views

Can my house support a bathroom addition?

When I bought the house, it was a 4 bedroom, 1 bath rancher with basement laundry. We have since "converted" the smallest of the 4 bedrooms to an upstairs laundry, and took the closet out to ...
2
votes
1answer
173 views

What size should sistered joists be when repairing a cut joist?

I need to repair a cut joist in my kitchen floor. I was going to use a header and sister the joists on either side of it. Question: how do I know what thickness of a header I should use? What about ...
2
votes
1answer
35 views

Can these be support columns with these brackets

Is there any way these columns with the top and bottom brackets can be supporting columns. If I can't tell by the brackets, I will need to break into their drywall at places to see if it or another ...
2
votes
3answers
325 views

Will installing a beam under my shed's floor framing eliminate the bounce?

The previous owner of my property built a roughly 16x12 outbuilding on posts. Besides doing many things in slightly stupid ways, the building overall isn't awful. I've converted it into a manhut where ...
2
votes
1answer
111 views

Hardwood Flooring Direction on Older Subfloor

I have some old hardwood flooring in my house and I'm considering installing new hardwood floors as it's not in the best shape. The house was built in the 1940's and has an older type of subfloor that ...
2
votes
1answer
72 views

What are the possible consequences of excavating an exterior basement wall?

I just bought my first home and right now we have a storm door entrance into our basement. This kind of baffles me why they put in a below-grade storm door because half of the exterior wall is exposed....
2
votes
1answer
8k views

What kind of board can span 16 ft for a wall pergola

We are building a wall pergola that we want wisteria to grow on top of. The pergola will only come about 3.5-4 ft out from the wall (Edit: the columns themselves are less than 2ft from the wall). I ...
2
votes
2answers
2k views

Is a double 2x4 beam adequate for a 64" opening?

I am opening my dining room and I don't want to compromise the structural integrity. The previous entryway was supported by two 2"x8". The new entryway is supported by two 2"x4". The new support is ...

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