About AWC Span Calc
The American Wood Council (AWC) Span Calculator for Wood Joists and Rafters (Span Calc) performs calculations for all species and grades of commercially available softwood and hardwood lumber as found in the 2012 National...
The American Wood Council (AWC) Span Calculator for Wood Joists and Rafters (Span Calc) performs calculations for all species and grades of commercially available softwood and hardwood lumber as found in the 2012 National Design Specification® (NDS®) for Wood Construction Supplement: Design Values for Wood Construction with March 2012 and March 2013 Addenda. Joists and rafter spans for common loading conditions can be determined. A span options calculator allows selection of multiple species and grades for comparison purposes.
Maximum horizontal spans for joists and rafters are calculated based on the following assumptions and conditions:
· Joists and rafters are oriented to support vertical loads applied to the narrow (1.5 in. thick) face of the member, resulting in strong-axis bending.
· At least three joists or rafters are installed parallel to one another and spaced not more than 24 inches on-center, with properly designed sheathing attached on the top (compression) edge of each joist or rafter.
· Joists and rafters are single-span with adequate structural support at each end. The Span Calculator does not address cantilevered joists and rafters, multiple-span joists and rafters, or spliced joists and rafters.
· For joists and rafters, most building codes specify a minimum bearing length of 1.5 inches on wood or metal and not less than 3 inches on masonry or concrete. These minimum bearing lengths are to be used in the absence of calculated bearing lengths. Consult the local building code for specific requirements.
· Joists and rafters carry only combinations of dead load plus live load (D + L), dead load plus snow load (D + S), or dead load plus roof live load (D + Lr). The Span Calculator does not address wind load or seismic load.
· Buildings in regions with ground snow loads greater than 70 psf should not use the prescriptive provisions of the governing building code without approval of the authority having jurisdiction. Buildings in these high snow zones should be designed in accordance with accepted engineering practice.
While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the American Wood Council nor its members assume any responsibility for any particular design prepared from this Span Calculator application. Those using this Span Calculator assume all liability from its use.
Previous Versions
Here you can find the changelog of AWC Span Calc since it was posted on our website on 2016-10-01 23:35:12.
The latest version is 2.11.22 and it was updated on 2024-03-28 21:18:08. See below the changes in each version.
AWC Span Calc version 2.11.22
Updated At: 2020-08-12
Changes: - More performance improvements;
AWC Span Calc version 2.11.21
Updated At: 2020-07-23
Changes: Fixed:
- If cell does not render correctly, it cannot be selected;
- No feedback when MaxSpan Grade is tapped before a Species has been selected;
AWC Span Calc version 2.11.19
Updated At: 2020-06-30
Changes: Fixed: App crashes when selected Species on devices without Android Roboto font pre-installed.
AWC Span Calc version 2.11.18
Updated At: 2020-05-07
Changes: Fixed: Crash on Samsung devices
AWC Span Calc version 2.11.17
Updated At: 2020-04-09
Changes: Address crashes in previous release
AWC Span Calc version 2.11.15
Updated At: 2020-03-20
Changes: Fixed:
- Changing some application settings will cause other analysis settings options to disappear;
- Intermittent crash when configuring Main Member type;
- Crash when trying to export HtmlPage;
- Intermittent crash when navigating;
- Updated to support 2018 NDS(R) (National Design Specification).
- Improved support for Sharing, printing and emailing results.
- Fixed: crash on Pinch or Rotate gesture
AWC Span Calc version 2.11.10
Updated At: 2020-03-06
Changes: Fixed:
- Intermittent crash when configuring Main Member type;
- Crash when trying to export HtmlPage;
- Intermittent crash when navigating;
- Updated to support 2018 NDS(R) (National Design Specification).
- Improved support for Sharing, printing and emailing results.
- Fixed: crash on Pinch or Rotate gesture
- Intermittent crash when an extended grade is selected and the Species is changed to a species without extended grades;
- The Round Results switch is not visible in the Settings;
AWC Span Calc version 2.11.9
Updated At: 2020-02-26
Changes: - Updated to support 2018 NDS(R) (National Design Specification).
- Improved support for Sharing, printing and emailing results.
- Fixed: crash on Pinch or Rotate gesture
- Intermittent crash when an extended grade is selected and the Species is changed to a species without extended grades;
- The Round Results switch is not visible in the Settings;
AWC Span Calc version 2.11.7
Updated At: 2020-02-21
Changes: - Updated to support 2018 NDS(R) (National Design Specification).
- Improved support for Sharing, printing and emailing results.
- Fixed: crash on Pinch or Rotate gesture
AWC Span Calc version 2.0.7
Updated At: 2017-06-26
Changes: Fix:
- Crash when launching after an upgrade
- Bearing Strength value (Fcp) shown as Shear Strength value (Fv)
Disclaimer
External Download
We do not host AWC Span Calc on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Galad and passed their terms and conditions to be listed there. We recommend caution when installing it.
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