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AWS Allowable Shear Stress Factor of Safety

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johnhanging

johnhanging

Mechanical
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The allowable shear stress for fillet welds on non-tubular steel structures in AWS D1:1 Table 2.2 is .30 x filler tensile strength. Since this is an allowable value for buildings I presume there is a factor of safety inherent in this formula. Does anyone know what factor of safety is applied for determining the allowable in this case?
 
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The factor of safety of weld metal would be 2.0, based on an ultimate shear strength of 0.6 x ultimate tensile strength of weld metal. The factor of safety of the joint may depend on the strength of base metal, depending on how the joint and welds are configured.
 
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