Filter

I need some advice for a concrete slab.

Thinking for the lift foundation area 4" or 5" is light, but I haven't designed a slab in a hot decade, and only for ag equipment, never a lift. A good article that looks more reasonable since you noted 15,000lbs support (note the 4,000 psi-5,000 psi min. strength in the article):

https://heavydutygarage.com/blogs/news/car-lift-concrete-requirements-thickness-psi-slab-prep-tips

The best way is always to pay an engineering firm to design something like this when human life is on the line (I may be biased as I am an engineer). I would at minimum try to contact the lift manufacturer as they likely have design recommendations for minimum dimensions, concrete strength and reinforcement. Your subgrade material and soils underneath do matter. Local firms should be familiar with working on the geology and soils you have. If you want to really be assured of safety, Quality Control testing of the concrete is usually not cost prohibitive (in comparison to the other costs involved here) to get a couple cylinders broke to check 28 day strength and have air entrainment and slump checked on the trucks when they pour(many concrete companies offer this as a service, but some will refer you to a local lab/engineer). Make sure the concrete in any footing and especially around the supports/beams gets vibrated well to ensure good consolidation as voids could make for a bad day here. Since you are contracting this you can specify you want copies of the QA/QC test results for your records. Find out if part of that $45k included the QA/QC testing as that may explain some of it.
  • Like
Reactions: ZiaHunter

The SIG Sauer P320 drama continues

Any striker fired handgun that keeps the striker cocked all the way back is going to be at the mercy of tolerances. Even Glock aftermarket triggers that do this have problems. Glock factory triggers keep the striker decocked off the primer so shit like this doesn’t happen. You can’t turn a striker fired gun into a hammered gun. People just need to accept it. Either deal with the long trigger pull or get a 1911. In 45 cal.
I agree that having a "dead" striker is the safest approach. However, we solved the same issue in bolt action rifles. Fully cocked striker when bolt is closed, inevitable tolerances between bolt and receiver and no problems (except with some Remington slop and of course SIG with the early versions of the Cross).

I need some advice for a concrete slab.

Got a price for a 40x64 metal building I want. Found a local guy who sounds like he knows what he's doing. It's going to have a 15,000 pound car/truck lift installed. Where the lift is going has to be 4 inches thick, steel reinforced and 3,500 psi.
I was quoted some crazy numbers up to $45,000 for a slab.
40x64 building, so I should probably go 41x65 to have a little wiggle room?
The local guy said to have an extra 6 inchs around the edge.
What size and how much rebar?
He said I'll need to rent a skid steer to clear and level the ground, but I was thinking about a mini excavator so I could dig out a little deeper for the lift area and the perimeter.
Do I need to do anything to the ground before pouring? I saw a video that said to wet it down with water before pouring to keep the concrete from drying too fast.
I am in South Texas, the ground is mostly clay and sand and shifts quite a bit.
Anything I am missing?
Just for reference I have 1 bow kill and I have not bench pressed anything in a long time.
How far south in south Texas? I know a good concrete guy out of bay city. Not sure how far he goes for work, but he's good, and he's fair. If your in his area.

Pouring extra slab outside the building seems crazy to me. Shouldn't need any more than the building size. You should have a detail on the footprint of the building. Anchor bolt layouts, door openings, that sort of stuff.

In my barn, I poured a 4" interior slab. I think. 12x24 beam around the perimeter and across the center of the slab in both directions. 3/8 rod on 16" centers in the mat, and 1/2" rod in the beams.

Poured 30x30 for a parking area in front of my barn. 6" thick, 1/2" rod on 12" centers. No beams. It's held up good.

Someone murdered Charlie Kirk

I agree with your overall assessment, however I would like to point out that the Nordic countries have really enjoyed being trade and military partners with the US, so they never had to invest the scores of billions necessary to equip their militaries with advanced technologies only developed and matured in the US.

This even applies to Finland (where my mom and much of my family is from) even when Finland was not part of NATO. Finland and Poland were 2 of the only European countries who took their defense seriously after the collapse of the USSR, knowing that there would be a limited window of opportunity to acquire advanced military aerospace systems and weapons from the US. Norway has also maintained a continuous state of vigil with their defense, while most of the rest of Europe has lowered their guard substantially since the early 1990s.

All of Europe and Canada have also benefitted tremendously from US loans, Lend Lease, the Marshall Plan, military technology, transportation systems, medical devices, EMS practices and protocols, communications, protection of the shipping trade routes, trade imbalances, and a laundry list of significant developments in the last century of American expansion. None of them developed post-War in a vacuum.

Norway, Sweden, and Denmark are all Constitutional Monarchies with Parliaments.
Finland is a Republic with a parliamentary representative democracy.

When a Marxist or even a peaceful liberal state how well socialism is working or has worked in the Nordics or Scandinavia, I remind them of these facts. After watching them over the past 50+ years and traveling to them or living there for extended times throughout my life, I have concluded that the Nordic countries have existed and made som progress despite socialism, not because of any application of it in their societies. The vast majorities of their parliaments are leftists loons who are clueless about what makes a nation function.
Fair points. Not having to have a defense budget is huge.

Another factor we didn’t talk about is scale. We’re talking about countries of less than an average American city. Some things scale better than others. Socialism doesn’t scale at all. Once you pass a certain size it invariably collapses under its own weight.

Someone murdered Charlie Kirk

One FCC job is literally to regulate decency over the air. Kimmels joke was fucking gross and he was lying his ass off as well. They probably got hundreds of thousands of complaints within minutes of him blabbering.

Fuck him and fuck anyone who watches him. They’re all irredeemable scum.

It’s not cancel culture… it’s consequence culture. — Trump Jr.

Sirhr
  • Like
Reactions: BCP

Franklin Armory Produces NFA Exempt Short-Barrel Firearm

Ok we’re missing the point. This is a regular 5.56 1-7 twist AR 7.5-12” bbl. But because they made special shot shells for it, it’s exempt from nfa without form4 or transfer fees or interstate restrictions. And shipping and transferring now due to court victories
So are you saying that we could still shoot regular solid projectiles out of the Antithesis?

If so, does that necessarily mean we would need to have the specially made shot shells in possession? I don’t think so, because it is designed to shoot the specially made shot shells.

This where FA needs to do a better job of presenting this to the consumer.

To recap, are you saying that we could buy the Antithesis in 5.56 and shoot ball ammunition through it as much as we like but not worry about getting special shot shells for it?

This won’t be popular, but serious question for the Vets on disability

The VA plays dirty games to fuck you over too. They try to tell you you have to see their doctors even if you already saw one and got all the documentation done because if you see their doctors then their doctors can write you up as if you are fine and deny you.

I had to get a letter from an attorney to get the VA to stop lying to me telling me I had to go back and see their doctors before they would process my claim.

It is just an endlessly dirty system that actively tries to screw you.

Don't rush to blame the vets first before the VA.

Both sides have their problems, but the VA causes most of the problems on both sides.
  • Like
Reactions: diggler1833

I need some advice for a concrete slab.

The slab will only be as good as the material underneath it. If you have clay in the sub grade the potential for movement will be there which can lead to slab failure. Spend the time to remove any expansive material under the slab and replace with quality fill or crusher fines or screenings. A 5" slab with 3,500 PSI concrete with #3 or #4 rebar on 16" OCEW will be plenty strong with turn down footings. Been a PM on large construction projects my whole career and have on more than one occasion been brought in to try correct slab failures which is very expensive. Best to do it right the first time.
  • Like
Reactions: BurtG

I need some advice for a concrete slab.

There should be a perimeter footing at the minimum. For a metal shop there is typically a 1-1/2" drop ledge so the ends of the metal sheets are below the base angle.
The amount of concrete and rebar is dependant on how much the ground can support. My new garage in northern Arkansas is a 5" slab 4000kpsi with a 2'x2' perimeter footing. 4 #5 rebar in the perimeter footing and 4x4 wire mesh on the top.
I did all the prep and the finishers charged me $1ft to finish. Concrete was $180 per yard. Which what the fuck it was $130 last year.

Only having 4" around a 2 post lift. Nope, I know some lift manufacturers say it's ok. I would have a perimeter footing in that footprint of the lift or piers. A buddy of mine is a civil engineer the flat 4" is not enough if something goes wrong.

There should be a vapor barrier under the concrete also. So wetting the ground pre pour isn't going to help with drying to fast. A decent size pour needs to start as early as possible with a big enough finish crew to get it down and finished. 40' wide will need truck access to both sides or pump it. Pump is going to be probably $2k plus $5/yd. Concrete batch plant can put retarder in the mix if there is concern about it going off too fast. Don't add water to the mix when it's there, it shrinks to much and does bad shit.

What did I miss..