Stringers Formula:
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Definition: This calculator determines the number of stringers needed for a deck based on the span and spacing between stringers.
Purpose: It helps deck builders and DIYers calculate the proper number of structural supports for safe and compliant deck construction.
The calculator uses the formula:
Where:
Explanation: The formula calculates how many stringers fit in the span, then adds 1 for the starting stringer at the beginning.
Details: Correct stringer calculation ensures structural integrity, safety, and compliance with building codes for deck construction.
Tips: Enter the deck span in feet and the desired spacing between stringers in feet. All values must be > 0.
Q1: What is a typical stringer spacing?
A: Standard spacing is typically 16 inches (1.33 ft) on center, but always check local building codes.
Q2: Why do we add 1 to the calculation?
A: The +1 accounts for the first stringer at the start of the span before any spacing begins.
Q3: Should I round up or down?
A: Always round up to the next whole number since you can't have a fraction of a stringer.
Q4: How does deck width affect stringer count?
A: The span (length) determines stringer count, while width determines stringer length.
Q5: What's the maximum allowed spacing?
A: Most codes require no more than 16 inches (1.33 ft) spacing for 2x decking, or 24 inches (2 ft) for 5/4 decking.