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Difficulty: EasySpecialty Fasteners and Anchors

When mounting a heavy fixture onto hollow drywall where no wall stud is available, which specialty fastener utilizes spring-loaded wings that spread open behind the wall surface to distribute the load?

  1. A
    Blind rivet
  2. Toggle boltAnswer
  3. C
    Masonry wedge anchor
  4. D
    Fluted wooden dowel

Answer

Toggle bolt
A toggle bolt is the standard specialty fastener engineered specifically for hollow walls. It consists of a threaded bolt and spring-hinged metal wings. When pushed through a pre-drilled clearance hole, the wings snap open inside the wall cavity and pull flush against the interior drywall face when tightened, distributing the load over a broad area.

Step-by-Step Solution

1
Identify the base material and load conditions described in the scenario.
The substrate is hollow drywall with no framing stud support, requiring an anchor that expands behind the cavity.
Hollow drywall cannot support heavy shear or tensile loads without spreading the weight across the back of the panel.
2
Match the mechanical expansion mechanism to the correct fastener type.
A toggle bolt consists of a machine screw and spring-actuated metal wings that unfold once pushed completely through the wall opening.
The expanded wings clamp firmly against the back of the drywall panel as the screw is tightened.

Key Concept

Hollow-wall mechanical fasteners and anchors
Estimated Time:45s
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Topics

Specialty Fasteners and Anchors

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