Yesterday we took a look at excavation work. Typically excavating a cellar hole isn’t a huge challenge but yesterday’s job site was very unique; go back and take a look.
Once the basement cellar hole has been dug it is time to build the foundation. Over the next couple days we will take a look at various types of foundations being widely used here in Northern New England.
Down at the bottom of everything are poured reinforced concrete footings. The footings of the foundation may not be beautiful but they are what carry the entire weight of the house. Needless to say they are VERY important. Normally the footings are 16” wide and 10” tall; they run around the entire perimeter of the basement wall supporting all of the dead weight from above. Almost every type of foundation wall starts with footings that are all the same. In the northern areas of the United States every home is built using footings that are below the frost line. That almost always requires that the footings be at least four feet below the finished grade so they never are affected by winter’s frost.
Normally footings are poured one day and the setting of Concrete Forms starts the very next day. Forms are the “plywood” panels that are formed to create two walls that are usually 8” away from each other. The inside of the two forms will eventually be filled with concrete; hence the name “Poured Reinforced Concrete Walls.”
In today’s photograph you can see the Forms, on the left side of the picture. On the right is the concrete truck that is delivering the concrete. Sticking out from the truck is a chute. Inside that chute sliding downhill from the truck to the forms; eventually the entire void between the forms will be filled with the concrete making it into a “Poured Reinforced Concrete Wall.”
The word Reinforced indicates that inside the forms are numerous Steel Reinforcing Rods to give the concrete greater tensile strength.
Concrete walls are predicted to have a service life of roughly 100 years. Perhaps that’s why they have become the most popular foundation wall.
Tomorrow we will look at different types of foundation walls.