SBCA’s Load Guide Updated for 2012 Code Cycle
Originally published by: SBCA — February 2, 2015
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The design of structural building components require a clear understanding of design loads and their application on the structure. It is essential that this information be provided by the building designer, while also essential that all applied loads are easily understood by everyone involved in creating the building design and developing the structural framework resistance. To assist its members, the Structural Building Components Association (SBCA), in cooperation with the Truss Plate Institute (TPI), created a Microsoft Excel spreadsheet program called SBCA's Load Guild that is essentially a comprehensive applied loads calculator that references ASCE 7 and the building code. The workbook contains spreadsheets that accept user input in order to calculate live, dead, snow and wind loads.
The Load Guide was created for use by building designers (architects and engineers), building code officials, component manufacturers, truss designer engineers and truss technicians, with the goal of helping users more easily understand, define and specify all the loads that should be applied to the design of each structural building component. It’s important to note this is a guide, or calculator, and is not intended to replace engineering analysis nor engineering judgment.
The Load Guide provides summary sheets for roof truss and floor truss live and environmental load calculations based on the various ASCE 7 input parameters. It also provides a handy dead load calculator for materials commonly used in light frame construction. These summary sheets are linked to commentary pages which include code commentary and referenced interpretations, examples and discussion regarding application of loads.
SBCA's Load Guide was recently updated to include the provisions of ASCE 7-10 referenced in the 2012 International Building Code (IBC) and the International Residential Code (IRC). Commentary was also added to show the provisions of ASCE 7-10 and how the changes to ASCE 7-10 have evolved from ASCE 7-05. Older codes and their references (i.e. UBC, BOCA, SBCCI, 2000 and 2003 I-codes) were removed to stay current within the three most current code cycles (2006, 2009 and 2012).
To view and download SBCA's Load Guide, click here (requires an SBCA-member login account to access).