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Expansion plugs are used instead of screws or nails to secure objects to walls, floors, or ceilings. They expand during installation to grip the surrounding surface, ensuring a secure bond. They can be used in wood, masonry, and even drywall. Metal expansion anchors are needed for concrete or masonry. Single and double expansion anchor models are available. The strength of the anchor depends on the material it is installed in, and it may not be suitable for damaged surfaces.
An expansion plug serves as an alternative to traditional screws or nails when fixing an object to the wall, floor or ceiling. Designed for use in solid materials, expansion anchors are often used in wood or masonry to ensure a secure and solid bond. The ends of these anchors expand during installation to grip the surrounding surface, which prevents the anchor from slipping out of the opening.
Builders and homeowners can use an expansion anchor to secure a picture to the wall or to hang a flower pot from the ceiling. These anchors can also be used to secure objects to floors or outdoor paved areas. While expansion anchor is often associated with concrete or masonry applications, it is also commonly used in wood and even drywall.
For applications involving drywall or wood, a plastic rawlplug may suffice. These anchors consist of a plastic casing with flaps on the ends. The installer drills a hole in the wall, then manually presses the anchor into place until the head is flush with the wall. When a nail or screw is driven into the center of the anchor, it forces the wings at the end of the casing to spread out to the sides. These wings, or flippers, are then capable of gripping drywall or wood from many different angles to hold an object in place.
Metal expansion anchors are typically needed to join concrete or masonry objects together. These bolts consist of a steel shell with wings at one end and a standard screw set in the center of the shell. Installers start by drilling a hole, then insert the bolt in by hand. Once the bolt is in place, a screwdriver or drill is used to tighten the screw. This pulls the screw inside the lugs of the bolt, forcing these lugs to the sides.
Both double and single expansion anchor models are available to meet the needs of various applications. Single expansion bolts have tabs on one end, while double expansion bolts have tabs on both ends. Double-ended expansion anchors work well in brittle materials, such as soft stone or mortar.
Users should note that an expansion anchor is only as strong as the material in which it is installed. This means that an expansion anchor will not hold if the surrounding surface is weak or badly damaged. Expansion anchors may not be suitable for use in damaged or crumbling concrete or softer woods.
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