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What sizes do spindles come in?

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Standard Sizes for Stair Spindles in the USA

Brief Summary

In the United States, common spindle (or baluster) sizes typically range in diameter from 1-1/4 inches (32mm) to 1-5/8 inches (41mm). However, other sizes are available, and the specific dimensions may vary depending on the material, style, and manufacturer.

Expanded Answer

Standard Spindle Sizes

While there is no single, universally mandated size for spindles, several standard dimensions are prevalent in the US market:

  • 1-1/4 inches (32mm): This is a common size for both wood and metal spindles, offering a slender and elegant profile.
  • 1-3/8 inches (35mm): Another popular choice, particularly for wood spindles, striking a balance between visual impact and structural integrity.
  • 1-5/8 inches (41mm): Often used for larger staircases or where a more substantial look is desired, this size provides increased strength and stability.
  • Other Sizes: Depending on the manufacturer and specific style, you may find spindles in other sizes, such as 1-1/2 inches (38mm) or 2 inches (50mm). Custom sizes may also be available for unique projects or design preferences.

Factors Affecting Spindle Size Choice

  • Building Codes: While there is no minimum spindle diameter requirement in most US building codes, the spacing between spindles is regulated. The maximum gap allowed is 4 inches, measured at any point along the balustrade.
  • Staircase Design: The overall design and scale of the staircase will influence the appropriate spindle size. Larger staircases may benefit from thicker spindles for visual balance and structural support.
  • Material & Style: Spindle material and style can also impact size selection. Metal spindles are often thinner than wood spindles due to their inherent strength. Ornate or heavily carved spindles may require a larger size to accommodate the design details.
  • Personal Preference: Ultimately, the choice of spindle size depends on your aesthetic preferences and desired visual impact. Thinner spindles create a more open and airy feel, while thicker spindles convey a sense of solidity and grandeur.

Measuring Spindles

  • Diameter: Spindle size typically refers to the diameter of the central shaft, not including any decorative elements or profiles.
  • Length: Spindle length varies depending on the staircase height and desired baluster height. Standard lengths are available, but custom lengths can be ordered or cut on-site to fit your specific needs.

Conclusion

Understanding standard spindle sizes and considering factors like building codes, staircase design, material, and personal preference can help you choose the right spindles for your project. Remember that proper spacing and installation are crucial for safety and compliance. If you have any questions or concerns, consult a qualified professional for expert guidance.