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The Southern Pine Inspection Bureau (SPIB) changed values for dimension lumber material 2-4” thick in the SPIB Supplement 13 , effective June 1, 2013, for Southern Pine and Mixed Southern Pine species. These changes were implemented in the following materials:
Lumber-soft for beams and jJoists
Lumber-other for joists (Mixed Southern Pine)
Lumber n-ply for beams, joists, columns and walls
Lumber-post for columns.
Lumber stud for walls.
The database files created were distributed to users in advance of the release of the Design Office and Sizer version 10 releases, in May 2013, and are also in the version 10 release.
The changes to Southern Pine design values published in the March 2012 Addendum to the NDS Supplement were implemented in version 9.2 only for lumber 2" thick, not for 3" and 4" thick. Therefore southern pine dimension lumber beams and joists 3" and 4" thick may possibly be under designed.
The default values for the custom I-Joist database now come from the APA document Performance Rated I-Joists, found at http://www.apawood.org/pdfs/download_pdf.cfm?PDFFilename=managed/Z725.pdf . Previously they were from an older, unknown source,
You are encouraged to change these values to correspond to the manufacturers specifications for the I-joists you are designing, using Database Editor.
There were numerous changes for NDS 2012 vs. NDS 2005 for glulam table 5A for members stressed primarily in bending, which were applied to the Glulam-Balanced and Glulam-Unbalanced materials for beams and the Glulam-Unbalanced materials for columns. The changes are summarised as follows:
Remove 20F- V9 combination
Add 16F V3, 20F-V14, 20F-V15, 20F-E8, 24F-E/SPF1, 24F-E/SPF3, 24F-V8, 26F-V5 combinations
The Fbx- value was increased slightly for five combinations
The Fvx value increased from 215 to 165 for the 16F E3 combination and reduced from 210 to 195 for the 20F 1.E stress class
The Ex value was increased slightly for 7 combinations and the Ey value changed for 11 combinations, sometimes increasing and sometimes decreasing
Fby changed for most combinations, sometimes increasing, sometimes decreasing.
The Fc┴x value changed from 740 to 805 for 6 combinations, and from 650 to 740 for 16F-V2
Ft changed for most combinations, sometimes increasing, sometimes decreasing.
Fc changed for 11 combinations, sometimes increasing, sometimes decreasing.
The specific gravity G changed for the 16F.1.3 and 20F 1.5 E stress classes.
Fvy increased for 4 combinations, but decreased for the 20F 1.5E stress class.
There were numerous changes for NDS 2012 vs. NDS 2005 for glulam table 5B for members stressed primarily in axial tension or compression, which were applied to the Glulam-Uniform materials for beams and the Glulam-Axial materials for columns. The changes are summarised as follows
Remove all E-rated combinations
Change the name of combinations 47 (SP N2M14) and 48 (SP N2D14) to N2M12 and N2D12.
Add combinations 73, 74, 75 (species POC, grades L3, L2, and L1D), and 49 1:14 (SP N1M14).
Increase slightly value of FT for 1 (DF L3) and 5 (DF L1D)
Change grade name for combination 5 from L1D to L1.
Increase the 2-3 lamination Fc value slightly eight of the Western Species combinations
Change the Fby value for combination 22 (SW L3) from 550 to 575
Increase the Fbx value slightly for 6 combinations, both Southern Pine and Westerm species.
Western Species
For Western Species, 12-¼” wide and 14¼” wide sections have been added. The range of depths depends on the material as follows:
For 12-¼” widths, depths from 12 to 16½; for 14¼” widths, depths from 13-3/4 to.19-1/2.
For 12-¼” widths, depths from 13½ to 60; for 14¼” widths, depths from 13-3/4 to 60.
For Southern Pine, 12” wide and 14” wide sections have been added. The range of depths depends on the material as follows:
For 12” widths, depths from 11 to 15-1/8; for 14” widths, depths from 13-3/4 to.17-7/8.
For 12” widths, depths from 12-3/ to 60½; for 14” widths, depths from 14 to 60½ .
For Stress Classes 24F-1.7E SP and 24F-1.7E WS for both Glulam-unbalanced beams and columns, and Glulam-balanced beams files the Fby value was entered as 850 when it should have been 1050 according to the 2005 NDS Supplement. This has been corrected.
Dry actual sizes have been added to the In NDS Supplement Table 1A for timbers 5” and thicker, whereas previously only wet sizes = nominal – ½” were given. As Sizer designs for dry sizes for all other materials, it now implements the new dry sizes for these materials rather than the previous wet values. The changes for both the b and d dimensions are
Nominal 8 : Previously 7.5, now 7.25
Nominal 10 : Previously 9.5, now 9.25
Nominal 12 : Previously 11.5, now 11.25
Nominal 14 : Previously 13.5, now 13.25
Nominal 16 : Previously 15.5, now 15
These changes affect the Timber-soft, Timber-other and Timber-hard materials for beams and columns.
The Coast Sitka Spruce and Yellow Cedar species have been added to the Lumber-other database file. Coast Sitka Spruce is named C. Sitka Spruce to keep it within the allowable name length.
For the joist material Lumber-other, the Northern species Fb value has changed from 1000 to 975 psi for SS Grade and from 600 to 625 psi for No1/2. For SS the Ft changed from 450 to 425 psi.
A special value of Fvy appears in Database Editor for multiple laminations that are not edge glued for materials in the Supplement from Table 5B ( loaded primarily axially), along with an explanatory note. This input has been obsolete and unused since version 2004, and has been removed, along with the note.