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Structure Magazine Holdown System Articles
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Al Commins has authored a series of articles
published by
Structure Magazine concerning shear wall performance,
tie-downs, self adjusting systems etc. Six articles are currently
published with more information to follow. Part 6 "Evaluating
Tie-Downs-a Systems Approach, the Sixth in the series, elaborated on the
four performance elements needed: Strength, Stretch, Shrinkage and
Reliability. It also outlines the requirements of several leading
jurisdictions.
The performance of shear walls supported on
settled/shrunken walls is difficult to understand unless you have
witnessed full scale testing. To aid your understanding we developed a series of videos. These videos show how a tight and loose walls behave, how
shrinkage compensators work and why a screw type device with no
backlash is only solution to full shear wall connections.
The series may be accessed through the following links:
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Hold Down Systems, Key to Shear Wall Performance, Part 1 - Basics
Part 1
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August
2007 |
530 kb |
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Strap and Tie-Down Systems, Part 2 - A Critical Evaluation
Part 2
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November
2007 |
321 kb |
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Continuous Tie-Down Systems, Part 3 - A Critical Evaluation
Part 3
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March
2008 |
1018 kb |
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Designing Rod Tie-Down Systems, Part 4
Part 4
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April
2008 |
332 kb |
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Rod Tie-Down Systems, Part 5 - Inspection
Part 5
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August
2008 |
610 kb |
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Evaluating Tie-Downs - a Systems Approach, Part 6
Part 6
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June
2009 |
400 kb |
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Pre-Publication Articles:
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Tie-Down Systems: Critical Code Changes Draft 7:
Part A Strength, Stretch and Shrinkage-Settling
Describes the codes that require including
Delta R in the elongation calculations of tie down systems.
Discusses how they work and how to meet them.
Includes graphs pictures and examples.
Part B Tie-Down System Reliability
Compares different types of shrinkage compensators. Includes graphs pictures and examples.
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March
2011
March
2011 |
410 kb
488 kb |
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