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Difficulty: MediumNails and Brads

A carpenter is installing thin cedar lap siding and needs a fastener with a flat head for holding power, but with a thinner shank diameter than a standard common nail to prevent splitting the wood. Which type of nail should be selected?

  1. A
    Roofing nail
  2. Box nailAnswer
  3. C
    Casing nail
  4. D
    Brad

Answer

Box nail
Box nails feature a wide, flat head combined with a thinner shank diameter compared to common nails of identical pennyweight, making them ideal for light construction, thin siding, and box making where splitting along the grain is a risk.

Step-by-Step Solution

1
Identify the required functional characteristics of the fastener from the scenario.
The fastener requires a flat head for broad holding surface area and a thinner shank profile than a common nail to avoid splitting delicate, thin lumber.
Thin materials like lap siding and box crates are prone to splitting along the grain when driven with standard heavy-gauge common nails.
2
Compare standard nail classifications against the structural requirements.
Common nails and box nails have identical lengths for a given penny (dd) size and similar flat heads, but the box nail is manufactured from a smaller wire diameter (thinner gauge).
The reduced displacement of wood fibers prevents splitting while the flat head maintains pull-through resistance.
3
Select the correct nail category.
The box nail is the proper fastener for thin siding applications.
Other nail types either have thick shanks (roofing nails), cupped heads for countersinking (casing/finishing nails), or insufficient holding strength (brads).

Key Concept

Nail Shank and Head Design Variations (Box vs. Common Nails)
Estimated Time:45s
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Topics

Nails and Brads

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