« "forty mike mike" .... w/in the great tradition of american crowd control .... | Main | "a house divided against itself cannot stand" .... »

October 17, 2013

Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

rightwingterrorist

Something wicked does indeed this way come.
My house in NE TX sits on a 6" slab, as does for the most part the rest of my outbuildings.
I agree with the assumption that this may be a garage, possibly for maintenance of up armored vehicles.
It may be possible though that what you're witnessing is typical .gov wasteful spending, which is completely out of control.
Who knows?
One would have to be deaf, blind, and dumb to not see the signs that something very bad is coming down the pike.
I sure as shit hope not, but if it is, I certainly hope it's swift, violent, and complete with patriots being the victors. I don't want my kids to have to do it.

rightwingterrorist

Also, and I may be wrong, isn't most plumbing for inhabitable structures (offices for instance) laid before the slab is poured? I didn't notice any in the photographs.

john jay

right wing:

you are correct.

if the plumbing is in there, i didn't notice it being laid. the only pvc line i saw go in was a single blue line from the front to the back, and the trench was back filled.

you'll also notice in the picture that no stubs of any sort are sticking out of the slab as it is being worked by the power floats. (floating trowels.)

and, a building with a "footprint" as substantial as this thing is not intended to house people.

john jay

Ross

Hi John,

Commercial grade concrete (generally what is used in driveway and garage slabs) generally has a compressive strength of about 3,000 lb/sq in, and about a factor of ten less (300 psi) in tension. If a slab in going to be cast on good, solid base material then slabs generally just have a welded wire grid cast into them at about mid-thickness to minimize the width of the inevitable shrinkage cracks (you can find hairline cracking in all slabs). If a slab is intended to support a load that may exceed the capacity of whatever the material that it is cast on then a grid of reinforcing steel (1/4” dia. to ½” dia) is placed at a level that is 2” above the dirt/ground/gravel/etc.). This places the reinforcing steel in tension. Steel will take about the same loads in tension as it will in compression. Reinforcing steel generally has a tensile strength of about 60,000 psi. So the steel takes the tensile load, and all the concrete above the steel handles the compressive load. Therefore, if the slab is reinforced in that manner, the thicker the slab the more resistance it will have against failure.

Without knowing the details of how the slab was cast it is impossible to calculate the load capacity. Typical garage/driveway slabs are 4” thick with the welded wire mesh in the center. So 6” to 8” slabs, if cast with the same wire mesh, are 50% to 100% stronger. If they are cast on a good, solid subgrade then slabs of that thickness will handle HUGE loads.

Ross

rightwingterrorist

Gas line?

rightwingterrorist

http://en.wikipedia.org/wiki/Utility_location

Guess I should have looked first.

Blue=water.

Should have been evident to me.

john jay

rwt:

i am a little weak on my pipe identification, especially pvc and the like, but the pipe i saw stacked in the trench, and they laid out in the trench, was about 3 or 4" in diameter.

a little big for a water supply line.

leading to the front door/garage door entrances.

sewer?

who knows?

john jay

rightwingterrorist

4" is quite large for a pipe. Must be using a fair amount of volume. If it were white I would suspect sewer, if it had open ends and holes in it and then covered with gravel I would suspect drainage.
4" color coded, now that's to be something hooked up to utilities.
Water, gas, possibly compressed air...
I'm thinking along the lines of a maintenance shop here.

john jay

rwt:

it looked a little thin walled to me to handle much air pressure.

but, i don't know the specs on the stuff, because i couldn't read the specs on the pipe. but, it was big stuff, easily 3", maybe 4".

i am thinking maintenance shop, as well. and, the different textures on the concrete surface, easily discernible at rectangular patterns, has me very curious as well.

i wish that i had seen the pours, and the preparation for same. i'll try to watch the parking lot prep a lot closer.

john jay

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name and email address are required. Email address will not be displayed with the comment.)