Discussing blueprint

Clark Rosales January 14, 2020

Post-Installed Anchors Vs Cast-In-Place Anchors

There are many types of anchor bolts. But the two most common are post-installed anchors and cast-in-place anchors. They have significant differences that you should watch out for. You might be set on one that may seem to fit what you need but if you don’t have enough information, you might end up choosing the wrong one. Here are the differences between the two anchor bolts.


What are anchors use for?

Anchor bolts, in general, are used to connect structural and non-structural elements to concrete. To connect something to concrete, anchor bolts or fasteners, steel plates, and stiffeners are used. Anchor bolts have the ability to transfer different types of load. This can be both tension forces and shear forces.

The connections made between your structural elements can be represented by a steel column attached to reinforced concrete or poured concrete floors. Another example is a facade system connected to a reinforced concrete wall using the anchor bolts. Any pallet rack or industrial shelving will remain where you attach it when you use these strong fasteners.


Why should you use anchors?

Why should you use anchors

You should use anchor bolts for the sole reason that it can ensure that structural elements are connected and are in place. The two types of anchor bolts can help do that for you very easily during the construction process. It can be used from the smallest projects to big construction plans. These offer the strongest type of security, even in the tensest areas of your project. Anchor bolts are even used to protect construction employees from serious harm. Knowing that the rack columns are attached to the poured concrete floor using anchors is reassuring and will prevent any future accidents in the construction project.

The holding power of any anchor bolt is entirely dependent on the quality of your concrete. When you install your anchors, make sure that the concrete is fully cured and it’s embedded deep within the structure. You can get the best holding power with this type of installation. The diameter can also directly affect the holding value and the right bolt can make or break your project. The anchors discussed below are some of the options you should consider.


Cast-In-Place Anchors

If you’re looking for the simplest form of anchor bolts, then the cast-in-place anchors are the anchor bolt for you. These anchor bolts are cast in wet concrete before setting. The design you’ll encounter with these consist of your standard hex head bolt. But there are other hooked designs like the J and L bolt. Cast-in-place anchors tend to be very strong and is used in many anchor applications. Use this if you’re handling large embedment lengths and high levels of tensile strength.

But these materials tend to be difficult to cast. It’s possible to get the wrong load and the right consistency at times. Some difficulties you’ll encounter are accurately positioning the anchors prior to casting. An expert should be able to navigate through the post pour issues in case there are any. It’s important to cover all miss wall locations when casting to prevent any project delays.


Post-Installed Anchors

Post-Installed Anchors

At times, you may have poured your concrete and let it set already. This is where post-installed anchors come in. This type of anchor is installed within a hole that’s drilled in your fully cured concrete. These are propriety products and there are two types of post-installed anchors. Unlike cast-in-place anchors, you’ll find that this is much easier to install. If you need to finish a project as quickly as possible, most of the time you’ll have to pour the concrete before completing the design. This means that you’re unable to pinpoint the exact anchor layout. This is when cast-in-place anchors become obsolete. Since post-installed anchors are easy to install, you can create your layout as soon as the concrete curing process is complete.

Post-installed anchors have two main types. Adhesive or bonded anchors come in various shapes and sizes. These also use different adhesives with the capability of reaching high bond-stress levels and faster curing times. Epoxy adhesive anchors are great examples of this.

The second type of post-installed anchor is the mechanical expansion anchors. What’s unique with this is that the anchors can expand and bear against the concrete. These are very inexpensive and you can easily install them in a pinch. But they can have low tensile strength. If you have a high tension zone where your concrete is likely to crack, don’t use this type. Wedge anchors, sleeve anchors, strike anchors and undercut anchors are the most common types.


Key Takeaway

If you’re choosing between the post-installed anchor and the cast-in-place, these fasteners will fulfill their purpose of attaching a structural or non-structural element to your concrete. Their differences make each special but a combination of both in your project will do you well. Your engineer should be able to pinpoint which to use to ensure the best strength and safety. Visit our website All Fast Dubai, if you’re interested in these fasteners and more!