September 22, 2015

Why Did the Wood Design Values Drop?

You may notice discrepancies in the wood design values when comparing RISA with the NDS 2012 and older versions of the code. The American Wood Council updated the wood design values in the Addendum, which supersede the values used in the NDS 2012 and previous versions of the Design Values for Wood Construction. The design values for all grades of visually-graded Southern Pine and Mixed Southern Pine lumber 2-4″ thick have changed. The Addendum can be found on the AWC website using the link below.

AWC - Addendum to 2012 NDS

The updated wood design values from the Addendum have been implemented in the Shape Database in RISA programs for all wood codes. These values can be found in the Shape Database under the Wood tab once a specific a material and size are selected.

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Tags: RISA-3D, RISAFloor, New, Wood

December 22, 2015 | RISA-3D, RISAFloor, RISA-2D, New, Wood

Wood Design per AWC NDS 2015 Wood Code

The latest versions of RISA-3D and RISAFloor now incorporate the AWC NDS 2015. The new provisions have been implemented in RISA-3D v14.0 and RISAFloor v10.0 and can be utilized by selecting the AWC NDS-15: ASD from the Wood dropdown menu on the Codes tab of Model Settings. After solution, the results are available in the Design Results spreadsheet. A Member Detail Report can be used to verify the code selection used in your design…

October 2, 2018 | RISA-3D, RISAFloor, New, Wood

Wood Design per AWC NDS 2018 Wood Code

The new AWC NDS 2018 code has been implemented into RISA-3D v17.0 and RISAFloor v13.0. To select this code for your design, simply choose this code from the Codes tab within Model Settings. After solution, the results are available in the Design Results spreadsheet. You can also verify the code selection used in your design in the member Detail Report. Some notable changes in RISA between the 2015 and 2018 NDS Wood Code are: The flat use factor (Cfu) is now applied to E & Emin for beams and stringers loaded on their wide face Design for Structural Composite Lumber in tension now includes the volume factor (CV) Updated and new material properties per NDS 2018 Supplement…

August 30, 2019 | RISAFloor, RISA-2D, New, Wood, LRFD

LRFD Wood Design per AWC-NDS 2015/2018 Codes

Strength Design (LRFD) according to the AWC-NDS 2015/2018 code has been implemented into RISAFloor v14.0. To select this code for your design, simply choose this code from the Codes tab within Global Model Settings. After solution, the results are available in the Design Results spreadsheet. You can also verify the code selection used in your design in the member Detail Report. Some notable differences between the ASD and LRFD design includes: The use of the Load Duration Factor, CD (per NDS 2015/2018 section 2.3.2) is no longer applied. The use of the Format Conversion Factor, KF (per NDS 2015/2018 section 2.3.5) The use of the Resistance Factor, ɸ (per NDS 2015/2018 section 2.3.6) The use of the Time Effect Factor, λ (per NDS 2015/2018 section 2.3.7) will be added as an input in the Load Combinations spreadsheet. A factor of 0.8 is used when designing wood wall panel sheathing according to NDS SDPWS 2015/2018 section 433…