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Calculate Withdrawal Strength of Dowel-type Fasteners:
 
Calculation:
Designer/Checker:
   
Input:
 
 
 
(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)
 
AWC 2012 NDS For Wood Construction 11.2.1, 11.2.2 & 11.2.3, Lag Screws, Wood Screws, Nails and Spikes:
The following is for calculating withdrawal strength of connection made up of lag screws, wood screws or nails and spikes.
 
Number of fasteners (N)
Specific gravity of wood member (G)
Fastener diameter (D - in or mm)
Average Length of fastener penetration into side grain of member (L - in or mm)
Load duration factor (Cd - for ASD only)*
Wet service factor (Cm)*
Temperature factor (Ct)*
End grain factor (Ceg)*
Toe-nail factor (Ctn)*
Time effect factor (TEF - for LRFD only)*
*Note if the factor is not required leave the default value set at 1.00.
     
   
Output:
 
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Adjusted withdrawal strength, W' =
Total connection withdrawal resistance, WR =
 
 
 



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