These 8” diameter concrete form tubes are not all the same diameter and are nested
by trippknightly
These 8” diameter concrete form tubes are not all the same diameter and are nested
by trippknightly
27 Comments
Well, you see the inner diameter of each is still 8″, but the outer diameter is varied. That allows the tubes to be nested for storage while also making consistent “8 columns. This is also all bullshit and it doesn’t work that way
Those are Chinese nesting tubes
This kind of stuff make me dislike buying construction materials from retailers more and more. If you “need” a specific diameter you can’t rely on the label alone.
Should we tell them about 2×4’s?
It’s an 8″ form tube – you can fit 8″ forms in all of them.
8″ diameter (+/- .75″)
They round down to the nearest inch. It’s a pillar of concrete in the ground…I’m guessing they went for shipping efficiency over precision, deliberately.
I mean, it’s AT LEAST 8 inches.
Obviously it’s 8 inches *long*.
/s
The cylinder must remain intact
They’re specified to have a tolerance of half an inch diameter
probably 7.75, 8, 8.25 to let them nest easily without fear of being out of spec
they do this mostly for storage and transport. the sizes are close enough for cement pouring. three nested 10″ tubes would all have inside diameters between 9.75-10.25″ which is plenty accurate for concrete forms.
It says nominal right on it
I bought a set of 3 a few years ago for $20. I needed another set and the next time they charged me $60. I complained but turns out they are sold separately and I just got away with it the first time. Very deceiving imo
Never trust a concrete guy when he says 8 inches!
If you read it, it says +/- 1/2inch
Those are all way bigger than 8”. My girlfriend will back me up on this
They say say right on the tube how much they can vary in size. Its intentional
I got yer 8” cylinder, right here!
Wait, you’re going to COMPARE it? Can’t you just take my word for it?
Redditors discovering manufacturing tolerances is always funny.
8″ Form is the brand
I also own the brands ’18” Rims Ford Focus/Fiesta/Fusion’ which sells all sort of rims, ‘Real Crab Meat’ (its not actually crab but i own brand so suck it) and ‘German Lager Beer distribution LLC’ (which sells socks)
Looks like those Tube manufacturers measure 8 inches the Same way I measure 8 inches
the fact that they are nesting is your first clue that they are all not the same diameter. this is done for shipping purposes and the variances are perfectly fine for most construction applications.
Always has been that way. They would be 3x more expensive if they didn’t nest because of shipping and storage.
They’re all the same size according to code. This is how you transport 10 tubes at a time for a deck and don’t need 4 trucks to move them.
Edit. The larger 2 are not 8” tubes.
Try comparing 3 different brands of measuring tapes.
You’re all delusional. Those tubes are 8″ long.