Hi All,
Good points!
The concrete bricks make good sense. Water should not be an issue. Structure is on top of a hill and there is a french drain that runs down the center of the slab, which should take water away before it rose up into slab.
But the inspectors feel strongly about not using...
Hi Cvg,
I kinda like the brick idea . . . it is masonary.
Don't have a physics explanation why they don't encourage bricks . . . just know it is either plastic or metal chairs.
Not in a place to really argue this one . . . sometimes the game is about picking the places to challenge . . but...
Hi All,
Local practices and inventories have driven us to step "out-of-the-box" for sourcing of the plastic chairs, which our mesh should sit on.
Since I am spending $3K for mesh/materials . . . I really want this mesh in the middle of the concrete (not at the bottom).
Unfortunately, neither...
Hi DIGT2002,
Thank you!
Was wondering if somebody would mention the obvious support these chairs would carry!
On the way to purchasing 2000 plastic chairs we discovered every last plastic chair within 250 miles has been purchased. So I am now looking at composite chairs, which are designed to...
Hi All,
Closure . . . placed a regular (non-GFC breaker in the box) . . . and turned it all on . .. works great . . .2.8 amps of current flow, under load . . . precisely as designed . . . no evidence, measurable, of current flowing through the ground.
Thank you!
Larry
Hi Jeff,
Have a similar project underway, with an elevator pit 5x5 sunk 6" below the surface of the slab foundation.
On #1 - Water is the subject and no matter how hard we discussed the "bonding" of the sunken pad with the slab . . . we could not get around the potential for water to seep into...
Hi Hokie66 and Ron,
Got it!
We have six drains, on a french drain system under the foundation/slab. The mesh stops as we approach the drains (no reason to try to get the mesh right up next to the drains). So, a foot or so next to each drain doesn't have reinforcing . . . with the fiber used to...
Hi Hokie66,
Appreciate the tip.
No, the plastic chairs are just to hold the mesh in place while we pour . . . no structural strength sought from the chairs.
Using fiber concrete to reduce the surface cracking and address where we don't have wire reinforcement.
Wire reinforcement is just to...
Hi All,
Great advice!
My takeaway . . . should have about 1,250+ chairs to handle the 5,000 sq ft of mesh . . . that would be 24" spacing ~~ 4 sq ft per chair.
Now I just need to talk the contractor into using the plywood walkboards to avoid crushing all the wire and chairs . . . smiling...
Hi
Pouring 5000 sq ft 6" slab in basement. Using W4xW4-4x4 WWF mesh (plus fiber). Need to purchase plastic chairs for the mesh . . . have a hunch I need 1 per 4 sq ft . . . 1250 chairs . . . the concrete will be pumped . . . believe the crew will operate from plywood over the mesh . . . just...
Hi PHovanian,
Thank you! . . . electrician is on his way this afternoon to add a standard 20A breaker and we will plug the longer underground line into that. We do have single GFCI recaptacles every 250 feet.
Realised last night that the long underground line parallels the deeper high voltage...
Hi Waross,
Excellent tip . . . yes, am using a GFI breaker . . . didn't realize the ground fault was as little as 15 milli-Amps . . . have seen small voltage surges during voltage tests . . . power company said the variations were related to having so much amperage so close and using so little...
Hi,
Have temporary 20 amp AC circuit serving no more than 700 watts of DC transformers for Fiber Optics modems. The breaker is in the center of a 3,000 ft line of #8 and #10 wire. 200 watts are at one end 1,600 ft away and 500 watts are on the other end 1,400 ft away.
Facts
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(1) Cable is...
Hi CivilPerson!
Appreciate the reply . . . you are a star!
. . . and yes, was intending to use a geofabric.
. . . so, I gather, using two different gravel sizes would not be a problem. The additional gravel is only about $1,600. The additional stability and ability to distribute the loads...
Building 50 x 100 house on non-expansive sandy-clay sub-surface. Depth to foundation is nine feet. Perimeter footing is 12" x 36", with 12" wide poured walls.
For the sub-base, intend to use 4" depth of 2" stone (#3), covered with 4" of 1" stone (#57).
House has 80,000 lbs of steel...
