The minimum size for habitable rooms, including bedrooms, is 70 square feet. The room must be no less than 7′ in any direction. Data is based on page 54 of the International Residential Code book. Remember, everything relies on finished measurements. Every dwelling must have at least one room with 120 square feet or more. […]

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# Posts by David King

## Minimum Ceiling Height 2012 IRC Building Codes

The minimum ceiling height according to the 2012 International Residential Code is 7′. There are exceptions such as basements and sloped ceilings. The information below is based on page 54 of the IRC. All dimensions are based on finished measurements. Habitable spaces, including hallways and laundry rooms, must have a ceiling height of less than 7′. […]

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## Hip Roof Decking Calculator

Use this roof decking calculator to easily determine the slopes for hips and valleys on all common pitches. Enter the length of one side and then either select a roof pitch or select custom rake and enter a value of your own. The length of the other side is automatically returned.

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## Concrete Yardage Calculator

Calculate how much concrete it will take in both cubic yards and how many of any size bags. Both are returned when values for the length, width, and depth are entered. Concrete Yardage Calculator Enter the width, length, and depth in feet and inches, or simply inches. The number of cubic yards is automatically returned […]

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## Cape Cod Rafter Calculator

Calculate the length of the main rafter, the length of the secondary rafter, the pitch of the secondary rafter, and the rise and run by entering the width of the roof, the pitch of the main roof, the thickness of the ridge, and the HAP for both rafters.

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## This Calculator Multiplies Feet Inches and Fractions

Use this calculator to easily multiply a number consisting of feet, inches, and a carpenter fraction by a factor that could be a decimal value. Multiplying a value represented by feet, inches and carpenter fractions involves reducing everything down to decimal inches. They are much easier too handle. In other words, 10′ 5 1/2″ would […]

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## Making Roof Trusses

Roof trusses are fabricated from individual framing members so they behave as a single object. They are typically engineered, but can also be home built. Home built versions can work great for shops and barns or anything else that must clear span (no posts or beams). Just know that if your project involves building inspectors, […]

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## Divide Feet Inches and Fractions Calculator

Divide a number consisting of feet, inches, and carpenter fractions with this free and simple on-line calculator. Use the number boxes below to select how feet, inches, and the fraction for the dividend. Then use the divisor number box to select the divisor (this an be a decimal value). The quotient will be automatically generated […]

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## Introduction to Roof Framing

From the very beginning of my framing career I was fascinated by roof framing. It was obvious to me, even at such an early age, that this was not easy thing. It was clear to me right off the bat that it involved extreme climbing, heavy lumber, harsh temperatures, and unbelievable schedules (not to mention […]

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## Ceiling Joist Span | What size do I need?

This ceiling joist span table is based on the 2012 IRC for uninhabitable attics with limited storage. It covers #2 common lumber species and sizes at 20 pounds per square foot load. Although 2 x 4’s are included in the official table, they are not listed because it is never advised to use them. 2 […]

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