FOOTINGS & FOUNDATIONS - Messerly Concrete's
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Footings & Foundations
Concrete Footings
Footings are an important part of foundation construction. They are typically made of concrete with rebar reinforcement that has been poured into an excavated trench. The purpose of footings is to support the foundation and prevent settling. Footings are especially important in areas with troublesome soils.
The construction of footings is best left to the pros that can assess the soil conditions and decide on the proper depth and width for the footings as well as the proper placement. The dimensions of footings also depend on the size and type of structure that will be built. Placement of footings is crucial to provide the proper support for the foundation and ultimately the structure.
Concrete Foundations
T-Shaped
A traditional foundation method to support a structure in an area where the ground freezes. A footing is placed below the frost line and then the walls are added on top. The footing is wider than the wall, providing extra support at the base of the foundation. A T-shaped foundation is placed and allowed to cure; second, the walls are constructed; and finally, the slab is poured between the walls.
In summary:
T-shaped foundations are used in areas where the ground freezes.
First, the footing is placed.
Second, the walls are constructed and poured.
Lastly, the slab is placed.
Slab-on-grade foundation
As the name suggests, a slab is a single layer of concrete, several inches thick. The slab is poured thicker at the edges, to form an integral footing; reinforcing rods strengthen the thickened edge. The slab normally rests on a bed of crushed gravel to improve drainage. Casting a wire mesh in the concrete reduces the chance of cracking. A slab on grade is suitable in areas where the ground doesn't freeze, but it can also be adapted with insulation to prevent it from being affected by the frost heaves. (see below)
In summary:
Slab on grade used in areas where ground does not freeze.
The edges of the slab-on-grade are thicker than the interior of the slab.
The slab-on-grade is monolithic (poured all at one time).
Frost Protected
This method only works with a heated structure. It relies on the use of two sheets of rigid, polystyrene insulation—one on the outside of the foundation wall and the other laid flat on a bed of gravel at the base of the wall—to prevent freezing, which is a problem with slab-on grade foundations in areas with frost. The insulation holds heat from the structure in the ground under the footings and prevents heat loss from the edge of the slab. This heat keeps the ground temperature around the footings above freezing.
In summary:
Only works with a heated structure.
Has the benefits of a the slab-on-grade method (concrete poured monolithically) in areas subject to frost.
Concrete is poured in one operation, versus 3 pours required for T-shaped foundations.
Helical Pier
A helical pier is a steel shaft with helices, similar to a large screw, that provides a foundation support for various types of structures. The shaft is usually square and manufactured in 5 foot sections. Helical piers are often used when challenging soil conditions prohibit a traditional foundation system. They are also commonly used to correct and support existing foundations that have settled or failed.
The helical piers main function is to support and stabilize the structure’s load bearing walls by transferring the weight of the structure off the weaker soils and onto the piers. One of the key benefits of helical piers, is that they can permanently lift a sunken foundation back to its original level.
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Toll Free877.731-3226
1678 South 1900 West • Ogden, Utah 84401
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801.731-3226• Toll Free 877.731-3226
Concrete Footings
Footings are an important part of foundation construction. They are typically made of concrete with rebar reinforcement that has been poured into an excavated trench. The purpose of footings is to support the foundation and prevent settling. Footings are especially important in areas with troublesome soils.
The construction of footings is best left to the pros that can assess the soil conditions and decide on the proper depth and width for the footings as well as the proper placement. The dimensions of footings also depend on the size and type of structure that will be built. Placement of footings is crucial to provide the proper support for the foundation and ultimately the structure.
Concrete Foundations
T-Shaped
A traditional foundation method to support a structure in an area where the ground freezes. A footing is placed below the frost line and then the walls are added on top. The footing is wider than the wall, providing extra support at the base of the foundation. A T-shaped foundation is placed and allowed to cure; second, the walls are constructed; and finally, the slab is poured between the walls.
In summary:
T-shaped foundations are used in areas where the ground freezes.
First, the footing is placed.
Second, the walls are constructed and poured.
Lastly, the slab is placed.
Slab-on-grade foundation
As the name suggests, a slab is a single layer of concrete, several inches thick. The slab is poured thicker at the edges, to form an integral footing; reinforcing rods strengthen the thickened edge. The slab normally rests on a bed of crushed gravel to improve drainage. Casting a wire mesh in the concrete reduces the chance of cracking. A slab on grade is suitable in areas where the ground doesn't freeze, but it can also be adapted with insulation to prevent it from being affected by the frost heaves. (see below)
In summary:
Slab on grade used in areas where ground does not freeze.
The edges of the slab-on-grade are thicker than the interior of the slab.
The slab-on-grade is monolithic (poured all at one time).
Frost Protected
This method only works with a heated structure. It relies on the use of two sheets of rigid, polystyrene insulation—one on the outside of the foundation wall and the other laid flat on a bed of gravel at the base of the wall—to prevent freezing, which is a problem with slab-on grade foundations in areas with frost. The insulation holds heat from the structure in the ground under the footings and prevents heat loss from the edge of the slab. This heat keeps the ground temperature around the footings above freezing.
In summary:
Only works with a heated structure.
Has the benefits of a the slab-on-grade method (concrete poured monolithically) in areas subject to frost.
Concrete is poured in one operation, versus 3 pours required for T-shaped foundations.
Helical Pier
A helical pier is a steel shaft with helices, similar to a large screw, that provides a foundation support for various types of structures. The shaft is usually square and manufactured in 5 foot sections. Helical piers are often used when challenging soil conditions prohibit a traditional foundation system. They are also commonly used to correct and support existing foundations that have settled or failed.
The helical piers main function is to support and stabilize the structure’s load bearing walls by transferring the weight of the structure off the weaker soils and onto the piers. One of the key benefits of helical piers, is that they can permanently lift a sunken foundation back to its original level.
1678 South 1900 West
Ogden, Utah 84401
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