Table 4a is based directly on the aci method but for table 4b the author has applied a reduced strength reduction factor a factor of safety.
F16 vs concrete wall.
Increasing the strength of the concrete mix or the thickness of the wall increases the wall s capacity.
The areas where they join together worry me as that could breakdown over time and leaking.
However the rate of change is different for each material.
A standard basement foundation 9 foot walls 5 inch floor etc can be 50 000 dollars this gets you a footing the foundation walls and the floor.
Plus superior walls offers a 15 year warranty that covers any structural defects and side wall water penetration.
The portions aboveground aremadeof wood.
Concrete masonry units cmu or precast concrete block wall are typically 8 x 8 x 16 blocks that can be stacked to form walls.
The fear of water is always in my mind with a basement and seen where precast walls are inherently waterproof above 5000psi.
Poured concrete foundation walls are arguably stronger than cinder block foundation walls.
I am currently deciding on precast vs poured concrete walls.
So taller walls in heavier soils should be made thicker or with stronger concrete.
An us f4 phantom jet tests the strength of a concrete wall built to withstand a nuclear blast by crashing into it at 500 mph.
The addition of reinforcing steel to either wall system complicates the issue.
The poured concrete wall has more mass or interlocking cement paste crystals to resist the cracking force.
Some bricklayers actually charge more to install concrete masonry they claim it takes more time to install and to clean.
Both materials change size when subjected to temperature and moisture changes.
The foundation is typically made of concrete asit has superior strengths against compression from the earth and rot from moisture.
The hollow block wall is depending solely on the strength of the thin mortar bed between each concrete block.
Without joints poured walls possess a greater lateral strength which essentially means they have a greater ability to resist pressure presented by water and the soil from the outside.
Both are made from concrete but depending on your project schedule and budget precast walls may be the best option.
Concrete masonry walls shrink whereas clay brick walls expand.