![]() Start with the 16.0 line in the Spacing column. ![]() Using Table F-2 (Figure 3), check each lumber size to see if a 16-inch spacing will permit a span of 15 feet 1 inch. The Table of contents indicates that Table F-2 matches these loading conditions. Note that these are normally only required to trussed rafter roofs and not for traditional purlin and rafter roof construction. Step 2 Span Table: Select the appropriate table in Span Tables for Joists and Rafters. Download the Northpine SG8/SG10 3 kPa Span Tables 3 KPA span tables> Northbeam Product List 2023 Northbeam product list> LINKS. This is the right way to fix truss clips connecting the rafter and wall plate. SG8/SG10 span tables> NEW 3 kPa Span Tables. Accessed byWflliam Powers on Feb 26, 201 s 6:29 AM pursuant to License Agreement with ICC. ![]() Chapter 8 also provides requirements for the application of ceiling finishes, the proper ventilation of concealed spaces in roofs (for example, enclosed attics and rafter spaces), unvented attic assemblies and attic access. 376 INTERNATIONAL CODE 2015 INTERNATIONAL RESIDENTIAL CODE Copyxight 201 4 ICC. Allowable span tables are provided to simplify the selection of rafter and ceiling joist size for wood roof framing and cold-formed steel framing. For simple construction, such as domestic construction, this can be determined from span table supplements in AS1684.2 and AS1684.3. Ratter Span Adjustment Factor 0.67 0.76 0.83 0.90 1.00 b. Vertical strapping at eaves pitched roofsĪt eaves level, vertical straps 1m long should be fixed as shown in the diagram opposite at a maximum of 2m centres. Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. ![]() Effective strapping at gable wallĮach strap should be fixed as shown in the diagram opposite with noggins between the rafters to support the metal strap along its whole length. Gable walls need to be strapped to the roof at the maximum 2m centres using 30 x 5m galvanised mild steel straps. This diagram illustrates the typical arrangement of a rafter and purlin roof and shows the dimensions referred to in the tables above. Roof pitch between 30 and 45 degrees strength class C24 Size of purlins in mm ![]()
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