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Spindle Formula:
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The Spindle Calculator For Decking helps determine the number of spindles needed for deck railing based on the length of the deck, width of posts, and desired spacing between spindles. This ensures proper safety compliance and aesthetic appeal.
The calculator uses the spindle formula:
Where:
Explanation: The formula calculates the number of spindles by dividing the available space (length minus posts width) by the spacing and adding one to account for the starting spindle.
Details: Accurate spindle calculation is crucial for deck safety, ensuring compliance with building codes (typically 4-inch maximum spacing), and achieving a balanced, professional appearance.
Tips: Enter the total deck length in feet, combined posts width in feet, and desired spacing in feet. All values must be positive numbers with spacing greater than zero.
Q1: What is the maximum spacing allowed between deck spindles?
A: Most building codes require that spindles be spaced no more than 4 inches apart to prevent small children from slipping through.
Q2: Should I include post width in my calculation?
A: Yes, post width reduces the available space for spindles and must be subtracted from the total length.
Q3: What if the calculation results in a fractional number?
A: The calculator rounds to the nearest whole number since you can't have a fraction of a spindle. You may need to adjust spacing slightly for perfect fit.
Q4: How do I account for corner posts?
A: Include the width of all posts in your "Posts Width" calculation, including corner posts.
Q5: Can this calculator be used for stair spindles?
A: This calculator is designed for horizontal deck railings. Stair spindles require additional calculations for angled sections.