Previous Topic

Next Topic

Book Contents

Book Index

I-Joist Deflection (v9 - Bug 2783)

Roof Joist Shear Deflection

For roof I-joists only, the program applied a 10% reduction to stiffness EI to approximate the effect of shear deflection, but also calculated the change needed in EI to implement shear deflection, compounding the effect of shear deflection. This has been corrected by removing the 10% reduction.

Floor Joist Composite Action

The program now adds a 10% increase in stiffness for floor I-joists to approximate the effects of composite action with the floor sheathing. Customized versions of WoodWorks Sizer for proprietary I-joist manufacturers such as Nordic Engineered Wood and Web Joist include detailed calculations of composite action.

EI in Output

The modified EI for shear deflection and composite action is now shown in the Additional Data of the Design Check report.

See Also

Engineering Design

Notch Design

Lateral Stability Factor KL

Vibration Design for Joists

NBC Glulam Fire Design (v9 - Feature 197)

Maximum Lamination Width for Kzbg Factor (v9 - Feature 205)

Glulam Shear Design

Weak Axis Structural Composite Lumber Design (v9 - Feature 140)

Wood Volume Output (v9 - Feature 171)

Bearing Design – Miscellaneous Changes

Absolute Deflection Limit Default (v9 - Feature 167)

Design Check Output Improvements

Case 2 System Factor for Axial Tension (v9 - Bug 2838)

19.2” Spacing (v9 - Change 132)

Design Search for Built-up Beams (v9 - Bug 2742)

Design for Custom Section Size Same as Nominal Size ( Bug 2842)

Design Search for Unknown Lower End of Section Size Range (v9 - Bug 2843)

Design Values in Output for Custom Multi-ply Members (v9 - Bug 2859)

Deflection Design for Weak Axis, Custom Multi-ply Members (v9 - Bug 2859)

Multi-ply Member Weak Axis Bending Resistance (v9 - Bug 2860)

Deflection Design for Weak Axis, Custom Multi-ply Members (v9 - Bug 2859)

NBCC Terminology (v9 - Change 173)

Part 4 of NBC in Program Information (v9 - Change 177)