Questions tagged [structural]

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

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1answer
90 views

Can you install a steel beam in timber posts?

I'm planning to remove a load bearing wall and place a 4500 beam. Steel is stronger than timber and I should be able to use a thinner steel beam than a timber beam. Does this make sense and how do I ...
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1answer
169 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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2k 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
475 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
5k 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
218 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
16k 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
221 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
208 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 ...
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3answers
934 views

What information do I need to size a sawn or hewn beam?

I have a load bearing wall in my house that a previous occupant decided to cut a hole in to make things feel more open. They did not add a header, much to my chagrin. I'm planning to put an exposed ...
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1answer
68 views

Please help - wonky post location on pergola - concerned with shearing and stability

So ever since my wife pushed me to move the post off square I've been searching online (periodically for about a month and I've never found someone dumb enough to have done this and had a tutorial or ...
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3answers
54 views

Supporting Ridge Beam Post with LVL?

I want to open this span (about 12') and planning to purchase 2 x 10" LVL's which will sit beneath the double top plate that is already there (so our beam will be 12.5" tall x 3.5" thick). There is ...
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1answer
68 views

Looking for a part: I want to put a vertical hinge onto a standing pipe

I would like to attach some kind of pivoting hinge onto a 1/2" - 3/4" metal pipe (e.g. galvanized or cast-iron): Something almost like this but instead of bolting onto a flat surface, it clamps onto ...
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1answer
107 views

Interior wall construction - Is it possible for this to be load bearing?

I have a 2-story brick house built in 1940 with balloon construction. On the first floor, I have an interior wall between my kitchen and living room. I have done (I think) my homework, looked at the ...
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1answer
209 views

Don't bore/notch in middle third of a joist… span or member?

Suppose I have a continuous joist supported somewhere in the middle. For ease let's say it's a 24 foot continuous joist, and there's a bearer right in the middle at the 12 foot mark. Here's a picture ...
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2answers
307 views

How can I support drywall with a steel post on an outside corner?

I have a steel support post right on the corner of a wall, which protrudes on one wall about 1/4". I am getting ready to look at drywall and wondering is there any other option than to build around ...
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1answer
5k views

How much weight can mild steel square tubing support?

I am looking to purchase a length of steel tubing with the following dimensions 1800mm x 25mm x 25mm with a wall thickness of 3mm. How much weight will be able to support at mid point if supported at ...
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1answer
220 views

Board on top of joists in attic. Is it structural?

I've attached a picture (not the best), but you can see the board I'm referring to peeking out of the insulation. The joists run left to right in relation to the point of view of this picture and ...
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2answers
3k views

How can I make sure a shed is hurricane rated? [closed]

I need to build a metal shed about 10' high and 6x6 in floor space which must be able to withstand 175 MPH winds. How can I make sure that the shed and its anchors can hold up under those conditions?
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1answer
973 views

Should a board connecting a beam in the attic to a rafter be removed?

When I bought this house (foreclosure) the prior owner was in the middle of a project to remove a wall. It is a load bearing wall 12' long that supports the ceiling joists which span 24'. T the other ...
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2answers
103 views

Need to attach shelving unit to wall; what kind of wall structure is this?

I live in an Australian inner city apartment built in 2007. I want to attach a shelving unit to a wall but haven’t ever done this before, so I want to make sure to do it properly. I’m not sure exactly ...
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2answers
98 views

This wall can be demolished, right?

Seems obvious to me that there is no load bearing on this wall since the wall stops at this point, but would love a second opinion.
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2answers
2k views

Deck post cut too short - possible solutions?

I have a new deck going in the back of my house, about 6' off the ground. Made a HUGE mistake and made cuts on the posts 4.5" too short. Short of removing the posts and concrete, digging new holes and ...
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1answer
72 views

Rising damp, ground floor walls

I have an old house (about 150 years old) which has an issue with rising damp. Plastic sheets were placed under the floors, so they aren't affected, but the walls (up to a max of 4 foot) are damp ...
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1answer
235 views

Where is the ledger supposed to attach to the rim joist?

If you look at the pic there's a gap right under the door way, about 5 inches deep and high. The rim joist of the house is halfway behind the brick and the other half is exposed right under the door. ...
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1answer
49 views

Can a 290mm x 45mm lvl beam be used as a structural ridge beam?

Also are ridge beams only used for exposed ceilings, or can you install ceiling joists which are connected to the rafters, - i assume this would provide extra support. This is for a single story ...
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1answer
492 views

How do you build a portable lightweight frame for trees?

I have fruit trees that vary in size that need frost protection in the winter and bird protection in the summer. I have been hanging frost cloth and bird netting over the trees using the branches as ...
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1answer
406 views

What is the unit dead load of concrete?

I have a question about what the unit dead load is. For structural concrete, the unit weight is 145 pounds per cubic food. Is the Unit Dead load 145 pounds?
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2answers
4k views

How do I prevent interior doors from sticking in the winter?

We have several interior doors that only stick or won't completely close in the winter. We also get cracks in the drywall mud above the doors so I think something else is going on besides just ...
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1answer
2k views

How close is too close, when digging below foundation level?

I'm digging a drainage trench near my foundation, and have hit the bottom edge of that foundation. In this case it's a T style foundation at the edge of a slab, but elsewhere there's no slab. From ...
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1answer
304 views

Is it allowed to have a small hole bored in a joist in the area where it is bearing on a beam or joist hanger

I am trying to determine if my house is up to code with respect to some holes that I found bored in the ceiling joists. The holes are about 1 inch in diameter and at least 2 inches from the top and ...
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1answer
93 views

Back door frame no longer square

I live on the 3rd (top) floor of a condo building. Our back door - which opens to the outside, is not square. The building was built in 2006 and the drywall around the door at the corners is cracked ...
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1answer
5k views

Can I use a threaded rod for a rafter tie?

Long story short: I am working on a 1960's house with no rafter ties. The rafters themselves are now attached with screws and strong-ties (previously just double nailed!) but I don't have faith in the ...
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1answer
421 views

How can I remove an inner wall of a gambrel house?

We own a Gambrel house built in 1978. I want to remove a six foot wall section that includes a doorway. This wall runs parallel to the floor joists in the basement. The main center beam is about three ...
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1answer
26 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 ...
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2answers
48 views

What is the best way to hang a weight lifting pulley system in my detached garage?

I want to hang this pulley system in my garage (partially pictured above) and probably will be loading it up somewhere between 100-200 lbs of plate weights: https://www.spud-inc-straps.com/econo-...
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1answer
46 views

How to demo a partially structural chimney?

Just bought a new home and would like to remove its chimney. It was originally built on the outside of the home and they built a carport up around it. It looks like it may have sprung a leak, so the ...
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0answers
44 views

What are the requirements for a header for an open passageway through two rooms?

My question is for both load and non-load bearing walls. There used to be a hinged door between the kitchen and dining room, who knows when it was removed (I've been here a couple years). The door ...
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0answers
25 views

Should I be concerned with the condition of the bearing end for this lintel?

Having stripped back the wallpaper in our living room in preparation for a re-skim of plaster, we have discovered a door which we didn't know existed, right next to the door into the living room from ...
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1answer
143 views

Load bearing wall or not?

I have a 10ft wall that spans only a third of the width of the house but is perpendicular to the 20' long 2x10s below it. One end of the wall could transfer load to the foundational wall but the rest ...
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0answers
154 views

Can I remove perpendicular ceiling joists in porch

I have porch attached to the exterior wall of the house roof is pitched away from the house: I am in the process of gutting it and want a vaulted ceiling. There are ceiling joists running ...
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1answer
293 views

How should I compute the clear span of a purlin in a roofing system?

My house employs purlins to support the roofing rafters. (this video explains almost perfectly what I have in the house). There are two purlins, about 6 feet from each other and the top ridge of the ...
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0answers
114 views

Retrofit Foundation Posts/Beams

Bought a new (old) place and our inspector pointed out beams/posts that need framing/structural straps in the crawlspace. Ballpark estimate I got from a foundation contractor (site unseen) was a $3,...
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0answers
717 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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0answers
363 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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0answers
140 views

Relocating a toilet without weaking floor joists

Can I drill a 4" hole in 2" x 10" floor joists 3' 6" from end of wall? I'm located in Ontario Canada if this is relevant.
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163 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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0answers
66 views

Concrete slab between stories

Here in the U.S., pretty much all the houses, even those that are made of brick, have framed floors, meaning there are 2 x (usually 10) joists from one side of the house to the other and then OSB ...
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0answers
95 views

What aspects of bricklaying are most important structurally vs aesethically

I've seen homes where the mortar is squeezing out between bricks. This appears pretty sloppy must still be structurally sound. It seems that the pointing of the joints is just an aesthetic choice. ...