Purchase Strike Anchors
Purchase Wedge Anchors
Many homeowners have the skills and capabilities to complete their own home improvement projects and renovations. This can save immense amounts of money as well as help homeowners develop new skill sets they can use in the future as new home improvements are needed. Large projects such as home additions, new garages or adding a patio can also be completed without hiring a professional. When building a new structure, it is critical to securely fasten it to the foundation or slab with the use of a sill plate.
A sill plate, also known as a sole plate, is the bottom horizontal member of a wall or building to which the vertical studs will be attached. Most sill plates are made from lumber - usually a 2x4, 2x6, 2x8 or 2x10. The sill plate is typically anchored to the foundation or slab of concrete, depending on the application. Before the next steps can take place, a sill plate must be anchored to the foundation to ensure proper construction and safety.
Before trying to anchor a sill plate to any type of foundation, it is important to determine which system is best for attaching the sill plates.
One method for fastening sill plates is the use of cast-in-place anchors, commonly referred to as "J" Bolts. "J" bolts are anchors in the shape of the letter J with threads on the end opposite of the bent end. These bolts are set in place before the concrete is poured. The use of "J" bolts provides the best holding values, but can be problematic for the do-it-yourselfer due to the expertise needed and complicated installation steps. The "J" bolts must be installed completely perpendicular and if not, numerous problems will occur when trying to attach the sill plate. Also, this method cannot be used when building a structure where there is an existing foundation, such as replacing a dilapidated garage. This could pose a serious problem for many home improvement projects.
28 days is the required time to fully cure concrete.
There is a type of concrete anchor that can be used when working with sill plates in less complicated applications and those with existing foundations. One option for installing sill plates is the use of Wedge Anchors. This type of anchor is a post-installed anchor, meaning that it is placed in concrete after it is fully cured. These fasteners are designed for use in solid concrete only. Wedge anchors are available from 1/4" to 1 1/4" in diameter. The length of the wedge anchor is completely dependent upon the thickness of the material to be fastened. To determine the size of anchor needed, it is important to check your local building codes or with an engineer or architect. It is also critical to verify the holding values required for your particular application since the quality of concrete will vary in every single circumstance.
Once the required holding values have been determined, use this wedge anchor sizing chart to determine the appropriate diameter and length. There are some other considerations when using wedge anchors.
Minimum embedment for the diameter being used +
Thickness of the material being fastened +
Thickness of the nut and washer =
Minimum length of the wedge anchor needed
Concrete Wedge Anchors can be installed in a few steps. Basic instructions follow:
It is critical to remember that hole diameter is equal to anchor diameter. This will affect the holding values of these wedge anchors.
For more detailed information and further instruction, take a look at this Wedge Anchor Installation Video.
When using concrete wedge anchors, it is important to remember:
As with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.