Double-Headed Nail

Definition

A nail with two closely-spaced heads to permit easy removal; widely used in concrete formwork as a temporary fastener.

Purpose

Double-headed nails are designed for temporary constructions where easy removal is essential. The second head allows the nail to be driven in securely but still be easily pulled out when the temporary structure is dismantled.

Examples of Use

1. Concrete Formwork: Used to hold forms in place during concrete pouring and then removed after the concrete sets.
2. Temporary Bracing: Provides secure yet removable fastening for temporary bracing and supports in construction.
3. Scaffolding: Used to assemble and later disassemble scaffolding structures.

Related Terms

• Common Nail: A standard nail used for general construction purposes.
• Box Nail: A thinner nail used for light construction.
• Screw Nail: A nail with a threaded shank for better holding power.

Notes

• Double-headed nails should not be used in permanent construction due to their design for easy removal.
• They are available in various lengths and diameters to suit different temporary construction needs.