|
YOU MUST HAVE MICROSOFT EXCEL INSTALLED ON YOUR PC IN ORDER TO RUN THE WWPA LUMBER DESIGN SUITE.
For common issues in installing the WWPA Lumber Design Suite, go to the FAQ page.
The WWPA Lumber Design Suite is a full featured design tool that provides calculations for horizontal framing (beams and joists), vertical framing (posts and studs) and wood-to-wood shear connections.
Calculations are available for the major sizes and grades of Western lumber products available in the market today. All calculations follow the 2005 National Design Specification® for Wood Construction (NDS®).
Beams/Joists Analysis and Design
This horizontal framing design program calculates reactions, shear, stresses, moments and deflections based on the specified loads. Calculations are made using user-specified design parameters and the program assigns appropriate adjustment factors and determines whether the specified member size is adequate.
All input and member qualification checks are handled in one simple screen. The Beams/Joists program calculates and diagrams bending moments, horizontal shear and deflection per the specified loads.
Adjustment factors for load duration, size, wet use, repetitive member, stability, incising, high temperature and form are based on user-specified service conditions.
Posts/Studs Analysis and Design
This vertical framing program calculates compressive stress, bending stress and combined stress ratio based on the specified loads for posts or studs. Calculations are made using user-specified design parameters and the program determines whether the specified member size is adequate.
All input and member qualification checks are handled in one simple screen. Adjustment factors for load duration, size, wet use, bearing area, repetitive member, stability, incising, high temperature, column stability, flat use and form are on user-specified service conditions.
Wood-to-Wood Single Shear Connections
This program calculates the single shear capacity of a nail, bolt, wood screw or lag screw connecting two wood members. Load duration, connector penetration and wood member end grain conditions are considered.
Group effect, spacing, edge distance, end distance, multiple use and diaphram use are not considered in this program. Applicable adjustments should be made if these conditions will increase or decrease the calculated values.
The controlling mode is determined and shown for reference. A Mode sheet is provided to examine the illustrated failure conditions. Always excercise engineering knowledge and judgement before applying any values calculated by this program.
Entering data
Entered and calculated data in the worksheets appear in the following colors:
Input data requiring entry by the user is indicated in blue.
Calculated values generated by the programs are indicated in brown. Reference values appear in olive green.
Correct values that are Checked OK appear in bright green.
Incorrect or "no good" values that are Checked NG appear in red.
Cells with a red triangle in the upper right corner indicate additional information for the related item is available. To see the comments, place your mouse pointer on the red triangle.
After entering data or selecting entries from a pull down tab, pressing the Tab key will take you to the next entry selection.
For additional information on Western lumber, go to the WWPA web site at www.wwpa.org. For information on the professional version of the Design Suite, go to the Forum Engineers web site at www.forumengineers.com/software.htm.
|