Questions tagged [structural]

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

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3answers
548 views

MC Cable through double 2x4 top plate

I'll be newly wiring a room on the second floor, in this case putting in outlets. The house is old, balloon frame 2x4s, with a double 2x4 top plate that the rafters rest on. I have 250 feet of 12/2 mc ...
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2answers
43 views

How to detect a load bearing wall?

Hello - I attached a quick picture to help determining whether the kitchen wall is load bearing. when I checked my basement, it has set of four concrete square pillars (not in the center but towards ...
1
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1answer
49 views

Rotating a staircase and making a new landing. How do I support it

I am looking to rotate this staircase. Instead of descending in a southerly direction, I would like them to descend to the east. To do that my plan is to make the top step (step 5) into a landing and ...
2
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0answers
72 views

What is the right way to plumb bathroom drainage across small joists?

Finished the demo part of the bathroom remodel to find pretty significant damage to the floor joists caused by the original builder's "design" (see photos/video). Setting aside how I'm going ...
1
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1answer
109 views

Unsupported joists in attic?

In my attic there is a beam that ends 80% of the way through. A few of the joists are connected with nails but are unsupported laterally. Should these joists have better support?
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3answers
127 views

Can I put holes in every floor joist?

I have a detached workshop (30'L x 25'W) with two levels. The second level is mainly (only?) for storage (floor is 3/4" plywood and can be seen in the picture). The floor joists of the second ...
1
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1answer
42 views

Garage ceiling joist support for studio apartment?

I bought a house with a 24x24' attached garage. The rafters above the garage has a cape cod style. There's already a door in the attic space leading to the outside (2 stories up with no staircase....) ...
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0answers
26 views

Is lag bolting ledger board into foundation safe for overhead storage?

I'm planning a project for an unfinished room in the basement and I have an important structural question. There's about 15' of vertical space but I want to build 10' ceilings with access to overhead ...
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1answer
58 views

Rough opening is too small for sliding patio doors

Just before installing a sliding glass patio door today in our self-built home, we measured the rough opening and it is 1-3/4 inch too short for the height of the slider. (The slider is 6 feet wide by ...
1
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1answer
47 views

Can I put a “U” turn in my range hood exhaust duct?

In the photo below The red arrow represents the direction of the exhaust, as you can see there is a load bearing joist in the middle which I can't cut. I'm planning to build a recessed ceiling on that ...
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5answers
5k 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 ...
2
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2answers
35 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 ...
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0answers
47 views

Best way to fill large (3") vertical crack in solid brick party wall?

I live in an East Coast row-house built in the early 1920s. There is a 3" crack in the solid brick party wall that I need to address (see photos). My neighbor's baby's room is on the other side ...
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1answer
51 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 ...
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0answers
23 views

Reflooring a horse trailer

What kind of treated wood thats is 1 1/2" thick x 6" or 12" wide will support roughly 300lbs per hoof.
0
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1answer
27 views

Shed Roof is Black and Has Water Damage

my Dad's shed had a roof that he didn't take care of for a while and now appears to have rotted in several regions. I'll provide several pictures, but the video is best: Link What is the best way to ...
0
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1answer
23 views

Steel stair stringer size

trying to design a straight stair run using steel tubes as stringers. total run = 10'-0". total rise is 8'-8", width 3'-0". Support is only at each end. yes these are steeper than ...
0
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1answer
33 views

Concrete block water wall footing requirements

My wife and I would like to build a 6 foot high, 8 foot long fountain wall, using concrete cinder block that will then be covered with stone veneer. My question is regarding the footing. We obviously ...
1
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1answer
101 views

Safe to remove this wall and header?

I am hoping to remove a portion of wall along with a door header. I don't think it is load bearing but I just wanted to get some opinions. I have had one contractor say it is, and another say it is &...
1
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1answer
96 views

What should be done to check the capacity of a 100+ year old wooden floor joist?

Short version A 7.5cm x 20cm wooden floor joist from an apartment constructed in 1906 in Rotterdam, the Netherlands will be subjected to an increased load. The type of loading the floor joist will ...
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0answers
12 views

Sizing wide flange I-Beam for 20" span

I am doing a barn renovation project (pacific NW, 98922), and need to take out a large load bearing wall and replace it with a beam. Was going to use an LVL (which I sized at about 5.5 x 18") ...
1
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1answer
68 views

Which is the load bearing wall?

We are looking to add a door to a wall in our basement and wanted to see what was possible by figuring out what wall is the load bearing wall. Both walls are perpendicular to the joists. The wall on ...
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
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1answer
80 views

Adding blocking between joist to support column?

I have this drawing for open up the living room wall. The architect is proposing a 5-1/4x16"x16' lvl beam with 5-1/4"x7-1/4" column on each side and adding 2x8" blocking btw. ...
26
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1answer
4k views

Seemingly overbuilt basement wall - load bearing?

I'm doing some prep/exploratory work before I begin finishing my basement. Home was built in 1980 and has a cement block foundation. There is a seemingly random wall framed in the otherwise unfinished ...
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0answers
36 views

Is this brick knee wall tied in to the main wall?

We would like to remove the L-shaped brick "knee wall" in the picture on the left. The picture on the right shows the seam between the knee wall and the main wall of the house. Is the knee ...
0
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1answer
41 views

Where can I get engineering info drafted for a custom header?

We’re building a shop ourselves and keep failing the shear inspection because we don’t have the engineering results to send to the city engineer. He said our wood supplier should be able to draft that ...
1
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1answer
39 views

Turn triple window into one bow window, structural concern?

I have a very old window probably from the beginning of this house in 1970's. Now I want to replace this old aluminum window with a bow window. my question is there are two posts of the triple window. ...
0
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1answer
239 views

Do I need a lintel on a non-load bearing wall?

I'd like to knock through an internal, 8cm-thick wall in order to install a door. The door will be sliding, and the sliding rail will be drilled into the wall above the opening. I know lintels are ...
4
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5answers
2k views

Will these DIY steel plates for post to beam connections work as well as the commercially available ones?

My soon to be constructed deck will have beams made from three 2x12s sandwiching ½" plywood, sitting on 6x6 posts. This gives both the beams and the posts a width of 5½ inches. To ensure the ...
1
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1answer
192 views

Is it safe to drill a 6" hole into a beam or i-joist for range hood duct?

I'm installing a range hood over my island after a kitchen remodel and I ran into an issue. If I try to run the ducting alongside the joists in the ceiling I run into a beam which looks to be ...
1
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2answers
76 views

Cracks in new house concrete foundation

I am buying a new home. The foundation was poured in Sept 2019. The home is nearing completion but the floors have not yet been installed. I see cracks in the foundation. Most concerning are two ...
3
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2answers
531 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 ...
1
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1answer
67 views

How to connect cross bracing on rotated posts?

I'm adding X style cross bracing to an elevated playhouse to increase stability. The deck sits 8' up on joists, which are on two beams, which are on posts. Problem is, the posts are sorta in a V shape ...
2
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3answers
101 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 ...
0
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1answer
32 views

How do I figure out if these walls are load-bearing?

My house is a bungalow built in 1917. There are pillars under a central beam in the basement supporting the first floor (marked in red in my little drawing.) There is nothing obvious supporting the ...
2
votes
1answer
123 views

Drywall is off, can this wall come out?

I know the most sure way to figure this out is to have an engineer look at this but am hoping to get some insight here from someone knowledgeable in this area. We live in a condo and have a truss roof ...
0
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1answer
23 views

Which foundation type for conservatory?

I live in a new property where due to the underlying characteristics of the land, piling was required for the foundations. Due to the additional cost, I'd like to explore what options for extension or ...
1
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0answers
64 views

Can I drill through the bottom plate of this first floor into the basement?

I have a 1905 balloon-framed house in western Washington. I would like to run wiring down the front exterior wall into the basement. I've tried looking up designs for this architectural style but it's ...
1
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0answers
31 views

concrete blocks

can you use the large interlocking concrete blocks(1600mmx800mmx800mm) to build a house? Would you use extra cement or would you it be safe and strong with the right structure to withstand hurricanes? ...
0
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2answers
78 views

Need advice on moving a cable with a steel beam and stairs in the way

I live in a tri-level home. I am on the bottom floor and trying to run a cable from the wall up into the ceiling of the lower floor to put lights into this room. The way that it is currently done is ...
0
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0answers
46 views

Steps to repair rotten 2 story wall

So I have a porch that has significant rot due to a leaky skylight. This had been fixed with a new roof. I found significant rot in the wall. This wall is load bearing and is supporting the roof. The ...
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1answer
80 views

How to stabilize a pergola

I am building a pergola but have no way of sinking the posts into the ground. I have drilled a steel bar into the ground about 8" and the same up into the 4 post which are 8"×8" 7 feet ...
0
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1answer
60 views

Lime mortar mix ratio

I am going to repoint an old interior brick wall (This is my first time) but the problem is that, I do not know what the best lime-to-sand ratio is? 1:2, 1:3, 1:1, 2:2 or something else? I want my mix ...
2
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1answer
82 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 ...
0
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2answers
56 views

Is it a structural wall

So my adult kids started working on the kitchen-they were planning to remove a wall that runs perpendicular to the peak (along the cross-joists, so we thought it wasn't a supporting wall). After ...
0
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0answers
28 views

suspending a 36x26 solar panel on a single 4x4x12 post (9' above ground 3 feet into the ground)?

I'd like to suspend a 36x26x1 aluminum solar panel 9 feet above ground on a SINGLE 12' 4x4 timber with some 2x4s at the top. I'm in central Florida. Will it be too top heavy? wind issues? it's a ...
1
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3answers
65 views

Is it possible to cut a larger opening in this window / serving hatch of this pool house?

I'm curious if it is possible to cut a taller opening in this pool house or if that would create structural issues supporting the roof From the inside you can see I would remove the 3 stubby studs ...
0
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1answer
62 views

Is a permit necessary to avoid any issues with future insurance claims?

Short story. I have an old brick building that is in poor condition and I have been working with a structural engineer to develop plans to make it structurally sound again. I want perform this work ...
2
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2answers
107 views

What's the proper way to add spacers between deck beam and joists

I have a 20 year old deck. One of the foundation posts (4x4) has sunken about an inch. The 4x4 post goes into the ground where it is affixed in concrete. The 4x4 post is notched at the top and two ...

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