Questions tagged [structural]

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

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3answers
921 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
55 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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3answers
51 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
58 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
86 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
133 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
195 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
3k 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
1k views

Converting closed tread stairs to open tread stairs

hopefully I'm using the right term. It might be called closed stringer stairs to open stringer (on one side). Please correct me so that I know the correct term for this. I also refer to it as "cut-...
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1answer
189 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
725 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
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
1k 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
70 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
233 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
480 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
389 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
297 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
89 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
4k 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
394 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
40 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
36 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
22 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
122 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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132 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
245 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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1answer
78 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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110 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
622 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
354 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
129 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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150 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
64 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
91 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. ...
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0answers
999 views

DIY Camper, framing advice needed

So my little teardrop trailer plans have changed into a 12'x6' camper so that I can stand in it. I'm in the planning phase still. What I'm doing for the walls is 3 layers; an outer 1/2" board, a ...
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1answer
504 views

Should I use non-shrink grout to help with support posts?

I am installing a new, approx 16' support beam in my house, to be held up initially by adjustable jacks, and permanently by 4 4" wooden posts. Some time ago I saw on one of the construction shows an ...
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0answers
249 views

Can these metal ceiling drywall joists be removed?

I recently removed the drywall ceiling from my basement with the intention to leave it as an exposed ceiling. Would I be correct in understanding that the metal ceiling joists (highlighted in blue in ...
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0answers
3k views

Do I need a header for an egress window?

I am in the process of finishing a bedroom in my basement. I need to add a window to the room and the selected wall is poured concrete. I need to know if I have to add a header above the window in the ...
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0answers
53 views

Calculating Tie Plate loading and double shear

I am considering the use of L strap ties from Strong Tie. I will be connecting two 4x4's in an L-configuration. The image at the very bottom-right corner of the below PDF illustrates exactly the ...
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0answers
775 views

Minor Crawlspace Excavation: Need permits/structural engineer?

Background: First house, built in the late 60s, bought in October 2014. Original house has crawlspace with combination cinder/concrete foundation. Master bedroom is an addition to the house with a ...
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0answers
545 views

Information resources for Traditional Japanese Homes

My family and I are preparing to purchase a more or less traditional Japanese home in Hawaii. I am checking up on the claims that it was brought here from Japan and built in 1965. Interior ...
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0answers
431 views

Is this vertical gap in the concrete block foundation something to worry about?

I'm looking at a home that has a vertical gap or crack running the height of the exposed concrete block foundation. The crack is near the center of the home, about a foot to the right of the concrete ...
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2answers
6k 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 ...
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3answers
114 views

Any chance a studded wall is a supporting wall?

I'm taking out a wall between two bedrooms to make it into one. This is a studded wall that was the back of the closet in one of the bedrooms and the wall in the other. This is underneath a flat roof ...