Table of Contents
Shear Walls
Typical Shear Wall
Location of Shear Walls
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Vertical Offset of Shear Wall
Shear Wall Over Floor Beam
Horizontal Shear Forces
Uplift Forces On Shear Wall
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Two Functions of a Shear Wall
What Provides Shear Wall Strength?
Lumber Strength Failure
Sheathing Strength Failure
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Combining Different Material Strengths
Sheathing Material Strengths
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Most Important Factors
Allowable Aspect Ratios
Northridge Earthquake Showed Us:
Reduced Code Values
Drywall Failure
Stucco Failure
Narrow Panel Failure
Successful Plywood Coverage
Wood Structural Panel Shear Walls
Douglas Fir-Larch
Effect Of Lumber Species On Strength
Use Proper Size Stud
2” Adjoining Stud
Install Proper Size Blocking
Cripple Wall Blocking
3” Flat Blocking
Reinforced Window Opening in Shear Wall
Blocking For Opening Reinforcement
How is the Length of Shear Wall Measured?
What’s Wrong?
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Acceptable Hold-Down Location
Lumber Grade
Effect of Lumber Grade on Hold-Down Capacity
Penetration Through Shear Wall
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Wood Decay
Termite Damage
Crawl Space Ventilation
Installing the Sheathing
Construction of Oriented Strand Board Panel
Construction of Plywood
Minimum Recommended Thickness
Use Correct Panel Grade
Sheathing Orientation
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Cripple Wall Ventilation
Shear Wall Fasteners
Use Common Nails
Use Proper Nail Length and Head Size
Performance Losses for Nail Substitutions
Nail Gun With Flush Attachment
Round-Head Nails (P-Nails)
Clipped Nail Head
1994 UBC:
Overdriven Nails
Important
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How to Nail a Shear Wall
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