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Old 03-25-2016, 07:56 AM  
plaster
So Fucking Banned
 
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Join Date: Apr 2015
Posts: 2,295
Oh my... Barry I can't even quote your response.

You do not form up a tilt up wall, tilt up means it was pre-fabricated. It would be ridiculous to create the wall as pre-fabricated. Form up the sections, pour it. Every day stuff. So I think we agree that cast in place construction is the route. Just wanted to clarify... tilt up means it was pre-fabricated already.

The only forces on the wall are wind and whatever seismic concerns, wind would govern. The thickness of the wall does not support the wall, the footing does. You do not put a wall on 10 foot packed gravel, you pour a moment footing to handle those forces.

A retaining wall holding back 30 foot of soil at 110 psf would not even be close to 19' at it's base. Wind, at it's highest, would be designed around 25 psf and that would be near the gulf due to hurricane forces. The rest would be around 18 psf or so, unfactored. Seismic would never govern because seismic forces increase based on the weight of the structure, since this is simply a wall supporting nothing other then the wall, seismic would never govern.

The wall would not even need to be 3 foot, reason for 3 foot is not the forces, it's so they can't core it out and walk through the wall. Also wanted to say that the thickness of a pre-cast section, and cast in place section, is roughly the same. Only time that thickness varies is if pre-tensioning of the reinforcement strands occur, which would be so outlandish to consider since the forces on this wall are so minimal. And the thickness of base of wall would be a judgement call to prevent trying to saw cut through it. 3 foot is more then thick enough to deter that.

Pilings and buttresses... lolol. Nope. Spread footing poured wide enough to handle the moment of the small ass forces applied to the face of wall... wind in worst case 100 year occurrence.

It is simple construction. Where did you get exactly these dimensions (19' base and 7' top and then atop a 10 foot packed gravel)?

Ever drive down the road and see those 25 foot or 30 foot sound walls? You think those are 19' wide at it's base and 7' wide at the top?
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