Small Nail Length Progression (2d to 10d)

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What happens here

This step demonstrates how to determine the length of smaller nails based on their penny size. The rule starts with a 2-penny nail, which consistently measures 1 inch long. For every subsequent penny size, up to a 10-penny nail, you add 1/4 inch to the length of the preceding nail. For example, a 3-penny nail is 1 1/4 inches, a 4-penny is 1 1/2 inches, and so on, following a consistent progression. This increment pattern is often relevant for nails used in applications like sheathing.

Goal: Calculate the length of nails from 2d to 10d.

Tools and materials

10-penny nail — Demonstrating 1/4-inch length increase
2-penny nail — Reference point for 1-inch length
3-penny nail — Demonstrating 1/4-inch length increase
4-penny nail — Demonstrating 1/4-inch length increase
5-penny nail — Demonstrating 1/4-inch length increase
6-penny nail — Demonstrating 1/4-inch length increase
7-penny nail — Demonstrating 1/4-inch length increase
8-penny nail — Demonstrating 1/4-inch length increase; often used for sheathing
9-penny nail — Demonstrating 1/4-inch length increase
Wooden board with markings — Visual aid for nail sizes and lengths

What they say

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Learn nail sizes. First off, penny and D mean the same thing. When someone says a 10 penny nail, they mean a 10 D nail, but it's more commonly called penny. The best way to learn this is to start with a 2 penny nail, and that's 1 in. Every consecutive nail, you add a quarter inch. So, if someone says he wants sheathing nailed with an 8 penny nail, that means you're going to do a 2 and 1/2 in nail. So, even though it's consistent, penny doesn't mean the gauge or the type of nail is the same. You see here, this is a 5 penny nail, but it's a finish nail. Nails come in different styles and gauge, but it's still the

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