Screwbolts vs. Throughbolts

Making the Case for Screwbolts in Concrete Fastening

When it comes to concrete fasteners, the choice between Screwbolts and Throughbolts can significantly impact the efficiency and success of your projects. Both options have their merits, but let's explore why Screwbolts may have the edge, considering key factors like installation, strength, and aesthetics.
h

Threaded vs. Expansion: Easy Install, Removal/Reuse

One of the standout advantages of Screwbolts lies in their threaded design, making them remarkably easy to install. The fully threaded construction not only streamlines the installation process but also allows for effortless removal and reuse. On the other hand, Throughbolts, characterized as expansion anchors, face limitations in this regard. Once installed, they cannot be removed or reused without resorting to grinding, leaving an unsightly steel section in the concrete to rust.
h
h
Strength, Stress, and Safety
The distinction between a 'screw anchor' (Screwbolts) and an 'expansion anchor' (Throughbolts) has significant implications for stress on the substrate. Screwbolts, being screw anchors, exert no stress on the substrate during anchoring, making them ideal for close-to-edge applications. In contrast, the friction force required for Throughbolts' expansion anchoring may lead to cracking, especially when close to the edge. Additionally, Screwbolts, with threads running the entire embedment depth, offer a more even load distribution across a larger surface area, enhancing overall load strength.
h
h
Head Marking for Identification
Screwbolts take the lead in terms of post-installation identification ease. The one-piece design allows for dimensions to be stamped onto the bolt's head, including diameter and length, facilitating quick and accurate identification. Through bolts however need to be hammered in, defacing the top of the anchor. Head marking is not practical for this reason.
h
[
Head Finish
Aesthetics play a crucial role in many applications, and Screwbolts offer a range of head profiles (Hex, Pan, Truss, Countersunk) that cater to diverse needs. The one-piece head profiles provide an aesthetically pleasing finish, ensuring suitability for high-exposure applications. In contrast, Throughbolts, with their thread-through nut design, leave an unsightly head finish once fixed.
In conclusion, while both Screwbolts and Throughbolts have their place in concrete fastening, the advantages of Screwbolts in terms of easy installation, stress-free anchoring, and aesthetic appeal make them a compelling choice for various applications. Consider the specific requirements of your projects, and you may find that Screwbolts offer the ideal solution for your concrete fastening needs.