I have run across a dead end distribution line, with an extension running about 200 feet further from the last transformers. Supposedly, this is for lightning surges; the reflection at the end of the line subtracts at the transformers.
Has anyone else seen this? Does it really work?
I'm looking for thoughts on duct design for an energy-efficent house.
The project is a 2400 sf house in the Dallas TX area. Manual J calculations show a 2 ton air conditioner with 800 cfm. More normal houses would have a 5 ton unit.
All equipment and ductwork will be inside the building...
After casting-in-place a buried septic tank with 12" thick walls, the form tie-rods will be removed leaving a 0.83" diameter hole through the concrete.
The question is what is considered sufficient to seal the hole: dry pack with Type 2 cement; dry pack with hydraulic cement; foam; or other...
I'm looking for a good way to seal a PVC pipe going through a concrete wall.
It's to be a buried septic tank with 12" walls, and inlet and outlet pipes of 3 or 4" PVC. The tank will be cast in place.
Your thoughts appreciated.
The problem is trying to design a light residential structure on expansive clay, Houston Black Clay. Footprint is 2400 square feet, rectangular, with a wrap-around porch of 6 feet. Area is undisturbed now, no trees or shrubs.
Geotechnical is potential vertical rise of 3.5", ymc 1.25" and yme...
