AWC Span Calc

AWC Span Calc Free App

Rated 4.50/5 (28) —  Free Android application by American Wood Council

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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 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.

How to Download / Install

Download and install AWC Span Calc version 2.0.4 on your Android device!
Downloaded 5,000+ times, content rating: Everyone
Android package: com.awc.spancalc, download AWC Span Calc.apk

All Application Badges

Free
downl.
Android
2.2+
For everyone
Android app

App History & Updates

What's Changed
Minor update to help with future release.
More downloads  AWC Span Calc reached 5 000 - 10 000 downloads
Version update AWC Span Calc was updated to version 2.0.4
More downloads  AWC Span Calc reached 500 - 1 000 downloads
Version update AWC Span Calc was updated to version 2.0.1

What are users saying about AWC Span Calc

O70%
by O####:

I understand this is american but a metric option would be awesome for us in Europe

U70%
by U####:

Great app for fast info, just not one you will use every day.

Y70%
by Y####:

It's a tool you always have handy

E70%
by E####:

Simple to use, no engineering require excellent would love this to do headers and girders

S70%
by S####:

Great application for determining rafters and floor joists

U70%
by U####:

Great tool door sizing wood components when I'm away from my office. Was a big help when I was inspecting a job with storm damage and needed answers immediately.


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Rating Distribution

RATING
4.55
28 users

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