Horizontal support structures beneath the floor running between load bearing walls.

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22 views

Add bracing to I-Joist

I am trying to build a non-load bearing wall parallel to the I-joist in my basement. I know that I need to add bracing to span the gap between the wall and the joist, but I am slightly confused as to ...
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2answers
32 views

What is the recommended post cap or strapping for corner post under beam and rim joists?

I'm trying to find the appropriate strapping to secure a beam to a post, while providing a means to attach a double rim-joist. Consider the drawings below: In both of these drawings if I use a post ...
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1answer
56 views

What is the proper hole size to drill through joists for wiring? [duplicate]

I am running CAT6a wire around my house and I was wondering what the maximum hole size I can drill to run cable across the joists in my basement to various rooms. I should measure but the joists are 2 ...
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1answer
20 views

Calculating floor load strength

Well I'm sure this had been covered over and over. I could not find the formula I seek. I'm building a storage room in the back of a large steel building on my property and I was thinking I'd use the ...
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2answers
58 views

Can I use a 2x8 for a ceiling joist and rafters on a 16' span?

I'm planning an addition which will be 16' wide by 27 feet long overall. the roof will span the 16' dimension. my question is, if there is no plan to use the space above the ceiling for storage or ...
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2answers
31 views

Mounting pull-up/exercise beam in corner above window

I'm considering mounting a beam for climbing exercise equipment similar to what is pictured below (see here for complete details): The set up (in my case) would consist of two 20" 2x8 base boards ...
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0answers
48 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
51 views

Is deck joist sistering a sloppy repair?

I have a few bad deck joists that I replaced with new PT joists. These repairs are great. Now I have a few more not too bad joists that will be rotted in a few years. I am thinking to add new PT ...
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1answer
102 views

Is a toilet drain permitted to run through I Joists?

It was suggested by a plumber, but is it common practice? The I joists are 11 7/8" but a 3.5 or 4" toilet drain line seems like a large hole to be cutting even if it's in the middle of the joist's ...
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2answers
75 views

Load capacity of 2x4s spaced 16"

We are trying to finish an above garage attic space as a playroom (since the ceiling will be slanted - 7' to 4' headroom). The "room" is 25' x 8' and currently has 2x4s that are 16" apart. My current ...
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37 views

2x6 deck joists: salvageable or need replacing?

We have a roughly 10x30 elevated wood deck off the pack of our house. The joists are all 2x6 16oc. The posts are 4x4 and are holding up a beam that the joists hang off of with joist hangers. I feel ...
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57 views

Installing a floor for storage above detached garage?

We have a gabled-roof single-story detached garage with horizontal 2x4 beams spaced four feet apart and a 20' span. There are two vertical 2x4 beams connecting the two horizontal center beams to the ...
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1answer
182 views

Where in the span of a floor joist can I drill holes to run wiring?

How far from the end of a 2x12 or 2x10 floor joist can I drill a hole? NEC 502.8 does not give this answer, only that you have to be 2" above or below the edges, not in what part of the span it has ...
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1answer
190 views

Hurricane ties installed using joist hanger nails top AND bottom. Should I yank them out?

I'm using double sided hurricane ties to secure my joists to my beams for a deck I am building. The tie looks like below: I had been using 1.5" joist hanger nails for the 6 holes at the top that ...
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1answer
40 views

Finding a stud in a highrise appartment

I would like to install my xpole in my apartment but I am unable to find the stud in the ceiling. According to my stud finder the entire ceiling is metal. Can anyone help? I am in a 24 story ...
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2answers
80 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 ...
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4answers
97 views

How to install 2x10 joists of slightly different sizes?

We are trying to install the joist hangers and the joists, but the 2x10s are slightly different sizes. The problem is that some of the boards are 9.25" and some are 9.5" and some in between. So if all ...
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0answers
52 views

Roof joists size and spacing

I am in process of building a 12'x16 lean to shed for a customer using (9) concrete peirs. 4x6 runners--16' long 2x6 floor joists 2x4 wall construction The roof slopes from the front to the ...
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47 views

How do I replace 2x4 outdoor decking with 1x4 hardwood decking?

I have a small entry area deck outside my front door, roughly 70 sqft. The deck is currently made of 2x4's and a few 2x6's screwed into ~16" on center floor joists. I replaced the front door and ...
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2answers
136 views

Free-standing deck joist layout

I'm trying to plan out a free-standing deck in an irregular-shaped garden. It currently has railway sleepers marking a garden bed around the west, north and east edges and the missus would like to ...
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1answer
130 views

How should I repair crumbling joist pockets in a brick wall?

I'm renovating an old row house with wooden joist in masonry pockets. In many places, the mortar under the bearing point of the pockets has crumbled, cracking a few bricks and lowering the pocket. ...
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0answers
104 views

Will insulating rim joist without sill plate lead to moister issues?

The house was built in 1930 and besides some bays stuffed with fiberglass the basement is uninsulated and unfinished. After two MN winters in the house I've managed to fill the larger holes but have ...
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2answers
110 views

Misaligned floor joist hangers

What is the best way to resolve an issue with misaligned floor joist hangers? Our flooring in the kitchen is starting to dip and sag and it is directly related to the fact that the floor joists are ...
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1answer
231 views

Modifying bottom chord of roof truss to accomodate new AC

We just had a new AC air handler installed, and it's much taller than the old one. Due to an error on my part, it's actually too tall for the space. And it is deeper than the space between the ...
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1answer
718 views

Knee Brace support Hanger for Treehouse

I am going to be building a Treehouse soon, and am researching the best and most cost effective means to do so. I am good on the platform and beams (using Treehouse Attachment Bolts), and am going to ...
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95 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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5answers
598 views

How to support the subfloor around a toilet between I joists

I'm replacing some rotted subfloor around a toilet, and I want to add blocking around the flange for extra support, and to give me a place to support the new pieces of subfloor (I'm not planning on ...
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1answer
96 views

Support for Tile floor

I have 2x8 (7.25x1.5) what appear to be doug fur or southern pine floor joists on 16" centers in a finished basement. I want to tile a master bath on the main floor. Joists span exactly 11' 4" from ...
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1answer
361 views

How to hang load from ceiling I-beam joists behind drywall?

I'm looking to attach rock rings to my garage ceiling. I've found similar posts, but in each one, they have a seemingly critical difference from my setup: I don't have access to above the joist ...
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1answer
182 views

Can I insulate PEX pipe in a crawlspace with fiberglass insulation?

I have PEX pipe hung under the floor joists in my crawl space. I am inclined to cut fiberglass wall insulation R-14 into strips and run it under the pipe.That will encase it as the floors are well ...
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1answer
226 views

How should I run electrical wire perpendicular to exposed joists in my basement?

I have some questions in regards to running electrical in an exposed, unfinished basement environment. I understand that wire running parallel to floor joists should be at least 1.25" above the bottom ...
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2answers
3k views

HVAC Duct options in floor joists

I will explain what I would "Ideally" want. I would like the HVAC in the basement ceiling to Not require a soffit. Plumbing seems possible because the holes for the most part will be small enough to ...
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1answer
123 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 ...
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0answers
169 views

How to repair straight cut floor joist?

What's the best way to repair a cut floor joist? It looks like when removing floor boards for remodel, someone has cut about half way through the top of joist with saw straight cut. No notching. I'm ...
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2answers
828 views

How to hang a chair from the ceiling joists (with attic access)

I'm planning on hanging a chair from the ceiling. From what I can tell the best method is to add a crosspiece above multiple joists, and mount the chair to that using an eye bolt. The problem with ...
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2answers
76 views

How can I level the joists and ceiling?

I am presently renovating a house that has a 4" difference from the middle to the one side due to the subsidence. It is a semi-detached duplex, with 3 floors including the basement. The worst is the ...
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1answer
816 views

How can I permanently fix a sagging floor?

I have a home I purchased roughly 18 months ago. The house is a traditional 2 story cape code (3BR 1BA) and is structurally very sound and extremely stable. However, on the primary floor of the ...
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2answers
337 views

Is there a limit to the number of holes bored in a joist?

I already know that a hole bored in a sawn lumber joist cannot be within 2" of any edge or any other notch or hole, and that the hole can be a maximum of 1/3 the depth of the member (International ...
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1answer
150 views

How do I lay joists over a complex-sloped basement floor

I am helping a friend install a bathroom in his basement. The basement floor is partially rock which has been covered in plastic vapour barrier and then covered in a thin layer of concrete. (The ...
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1answer
280 views

Can rigid foam board have an air space between it and rim joist?

I am insulating my rim joists with 2" rigid foam board. Most of the rim joist is bare, and the foam fits along it nicely. Some sill boxes have some small irregularities (vent pipes, plumbing, etc) ...
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1answer
129 views

which layer of rigid foam should i caulk when insulating rim joist?

I am insulating my rim joists with rigid foam board in a manner similar to that described on the familyhandyman's website. I am considering adding a second layer of foam board to get closer to the ...
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1answer
194 views

How can I fix a floor joist that has separated from the cross beam?

I have just 1 beam that is no longer in the notch that is supposed to rest in on the crossbeam. The house is 100 years old. Would it be a safe option to install a floor jack to bring the beam back up ...
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1answer
72 views

How much work would be required to repair this roof?

I'm looking to buy a new house that needs a lot of work doing (almost a complete renovation job, rewiring, plumbing, damp proofing etc). On the last visit I went up into the loft to see what work ...
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1answer
950 views

How can I add joists to an existing trussed ceiling?

My garage ceiling framing consists of manufactured 2x4 trusses over a 20.5' span and on 24" centers. There is currently some plywood flooring for light storage. The sheetrock that was on the ceiling ...
2
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1answer
63 views

Can I use the area above my garage for an extra room?

I want to use a 8 x 20 space above garage for an extra room (Load Bearing). It has two 2 x 10’s sister’d together spanning of 20 feet and 16 inches apart with no center support. Can I make this set ...
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101 views

How can I level sistered floor joists? [closed]

I have a 6' deep and 18' wide roof deck that has water damage. I removed the old flooring and tile. The joists by the stucco railing are rotten. The joists by the house are fine. I removed the rotten ...
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1answer
282 views

Insulating and reducing boominess of plywood subfloor

I have a plywood subfloor in a ground floor extension that is laid directly on the joists. The current floor is half solid wood tongue-and-groove laid on top of green fibre underlay and half fake ...
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2answers
340 views

Is a 6 in. hole in a band joist okay?

I'm installing a Zephyr AK6500 range hood. The kitchen is on the first floor a 2 story home, which was built in 1967. I've run 6 in. round ductwork in a joist bay in the kitchen ceiling to the ...
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1answer
153 views

Ceiling joists job in a cinder block house

So I have a 25 x 30 square house made of cinder block. Roof is just a gable roof with gables on the ends of the 30ft length. My question is, I know in stick framed houses the ceiling joists act to ...
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1answer
488 views

How do I correct free-standing deck moving away from home?

I have what is primarily a free-standing deck (18x22) in the back of my house. I say "primarily" because I did nail into the ledger board underneath my glass sliding door, but only there. The rest ...