Butterfly screws, also known as toggle bolts, are a type of fastener that features a pair of wings that fold during installation and expand once they are inside a pre-drilled hole. The design allows for a stronger grip on hollow walls, such as drywall, where regular screws might not provide sufficient anchoring. Butterfly screws are particularly useful for mounting heavier items like televisions, where the risk of falling can be a significant concern.
Shear studs are typically welded to the steel section of a composite beam before concrete is poured. Their primary function is to transmit shear forces between the steel and the concrete, preventing the two components from sliding apart under load. This connection enhances the load-carrying capacity of the beam and allows for a more efficient use of materials, ultimately leading to lighter and more cost-effective structures.
