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How To Guide - Ledger Board Bolting

Click on the links below: Ledger Board Bolt Size & Spacing

We have calculated the spacing between ½" carriage bolts for 2"x8", 2"x10" and 2"x12" pressure/preservative treated southern yellow pine framing. Your local building codes may determine a different spacing all together, so be sure to contact them to verify building requirements. These charts are calculated to determine the widest spacing your carriage bolts should be with different ledger sizes.

2"x8" Ledger
Joist Span From Ledger To Beam (feet) 6 8 10 12 14 16
On-Center Spacing Of Bolts (inches) 36" 36" 34" 29" 24" 21"




2"x10" Ledger
Joist Span From Ledger To Beam (feet) 6 8 10 12 14 16
On-Center Spacing Of Bolts (inches) 36" 36" 35" 31" 26" 23"


2"x12" Ledger
Joist Span From Ledger To Beam (feet) 6 8 10 12 14 16
On-Center Spacing Of Bolts (inches) 36" 36" 36" 31" 29" 26"

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